{"id":548415,"date":"2023-02-06T16:00:00","date_gmt":"2023-02-06T13:00:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/how-to-test-the-power-supply-unit-psu-in-your-pc\/"},"modified":"2023-02-06T16:00:00","modified_gmt":"2023-02-06T13:00:00","slug":"how-to-test-the-power-supply-unit-psu-in-your-pc","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/","title":{"rendered":"#How to Test the Power Supply Unit (PSU) in Your PC"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a2f27c0002ed\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #dd3333;color:#dd3333\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #dd3333;color:#dd3333\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a2f27c0002ed\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#%E2%80%9CHow_to_Test_the_Power_Supply_Unit_PSU_in_Your_PC%E2%80%9D\" >&#8220;How to Test the Power Supply Unit (PSU) in Your PC&#8221;<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Signs_Your_PSU_Is_Failing\" >Signs Your PSU Is Failing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#How_to_Test_Your_PSU\" >How to Test Your PSU<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Testing_Your_PSU_with_a_Basic_Jumper_Test\" >Testing Your PSU with a Basic Jumper Test<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Testing_Your_PSU_With_a_Multimeter\" >Testing Your PSU With a Multimeter<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Testing_Your_PSU_With_a_PSU_Tester\" >Testing Your PSU With a PSU Tester<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Power_Supply_Unit_Frequently_Asked_Questions\" >Power Supply Unit Frequently Asked Questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Can_You_Have_Too_Big_of_a_PSU\" >Can You Have Too Big of a PSU?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Do_Oversized_PSUs_Waste_Power\" >Do Oversized PSUs Waste Power?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#What_Do_%E2%80%9C80_Plus%E2%80%9D_Power_Certifications_Mean\" >What Do \u201c80 Plus\u201d Power Certifications Mean?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Does_PSU_Quality_Really_Matter_That_Much\" >Does PSU Quality Really Matter That Much?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Can_I_Reuse_My_PSU_in_a_New_Computer\" >Can I Reuse My PSU in a New Computer?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Can_I_Reuse_My_Old_PSUs_Cables\" >Can I Reuse My Old PSU\u2019s Cables?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#If_You_Upgrade_Your_GPU_Do_You_Need_a_New_PSU\" >If You Upgrade Your GPU, Do You Need a New PSU?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Can_You_Upgrade_an_Existing_PSU\" >Can You Upgrade an Existing PSU?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Are_the_PSUs_in_Prebuilt_Computers_Low_Quality\" >Are the PSUs in Prebuilt Computers Low Quality?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Can_I_Use_Two_PSUs_in_a_Computer\" >Can I Use Two PSUs in a Computer?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/buradabiliyorum.com\/en\/how-to-test-the-power-supply-unit-psu-in-your-pc\/#Is_Capacitor_Aging_Really_a_Concern_in_PSU_Longevity\" >Is Capacitor Aging Really a Concern in PSU Longevity?<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E2%80%9CHow_to_Test_the_Power_Supply_Unit_PSU_in_Your_PC%E2%80%9D\"><\/span>&#8220;How to Test the Power Supply Unit (PSU) in Your PC&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<div>\n<figure style=\"width: 1272px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"type:primaryImage wp-image-867935 size-full\" data-pagespeed-no-defer=\"\" src=\"https:\/\/www.howtogeek.com\/wp-content\/uploads\/2013\/10\/PSUHeader1.jpg?width=1198&amp;trim=1,1&amp;bg-color=000&amp;pad=1,1\" alt=\"A modular power supply unit, inside a PC tower case.\" width=\"1272\" height=\"720\" data-credittext=\"Hannah Stryker \/ How-To Geek\"\/><figcaption class=\"wp-caption-text\"><span class=\"type:primaryImage imagecredit\">Hannah Stryker \/ How-To Geek<\/span><\/figcaption><\/figure>\n<p>Testing your computer&#8217;s power supply unit is fairly simple. You can test the PSU with a basic jumper test, multimeter, or power supply tester. This will help you rule out power delivery issues as the source of your problem.<\/p>\n<p>Experiencing computer problems? They could be caused by a failing (or outright fried) power supply unit. Here are some signs your PC\u2019s PSU hardware is the problem\u2014and three ways to test the PSU to see if it\u2019s still working properly.<\/p>\n<h2 role=\"heading\" aria-level=\"2\"><span class=\"ez-toc-section\" id=\"Signs_Your_PSU_Is_Failing\"><\/span>Signs Your PSU Is Failing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Before we talk about testing your computer\u2019s power supply unit (PSU), let\u2019s talk about <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/834049\/8-signs-your-computers-psu-is-failing\/\">common signs your PSU is failing. These are worth investigating and potentially replacing your PSU to avoid bigger problems like hardware failure or data loss.<\/p>\n<p>The power supply unit is often overlooked in the PC troubleshooting process. But if you have unstable power, you\u2019ll have numerous small and difficult-to-diagnose problems cropping up all over the place.<\/p>\n<p>When a PSU fails, the best-case scenario is your computer won\u2019t start, and you simply replace the bad PSU. In the worst-case scenario, it fails catastrophically and takes other hardware components with it. If there are any signs your PSU is failing, you should test it.<\/p>\n<ul>\n<li><strong>Smoke or burning smells<\/strong> can indicate component failure and electrical arcing, even before a complete PSU failure.<\/li>\n<li><strong>Your computer shocks you<\/strong>. The shielding and grounding in your computer have failed somewhere.<\/li>\n<li><strong>Your computer randomly shuts down or blue screens<\/strong>. If you can\u2019t pinpoint it to a software problem or a new piece of hardware like a GPU, it\u2019s possible issues with your PSU are causing voltage drops and shutdowns.<\/li>\n<li><strong>Boot stability is inconsistent<\/strong>. If your computer errors out or crashes intermittently on boot, there\u2019s a good chance your PSU is on its way out.<\/li>\n<li><strong>Noise from the PSU<\/strong>. Whether it\u2019s fan grinding (the fan in most PSU models is not user-serviceable) or high-pitched whining or buzzing from the PSU, any noise beyond the slight hum of the fan is usually a bad sign.<\/li>\n<\/ul>\n<p>If you\u2019re troubleshooting a ghost-in-the-machine type problem that seems unsolvable no matter how many times you reseat hardware components, reinstall drivers (or even the whole OS), or otherwise deep dive into fixing your PC, you absolutely should test your PSU.<\/p>\n<p>We\u2019d go even further and suggest that you not only test a PSU if you suspect power supply issues are behind your current PC woes, but you should also test a brand new PSU before installing it in your computer.<\/p>\n<p>The chances of getting a defective PSU from a reputable manufacturer are slim, but testing a PSU is so easy there\u2019s no reason not to take a moment to do so before mating that PSU with hundreds of dollars worth of hardware.<\/p>\n<h2 role=\"heading\" aria-level=\"2\"><span class=\"ez-toc-section\" id=\"How_to_Test_Your_PSU\"><\/span>How to Test Your PSU<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>There are three ways to test your PSU. One requires little more than a paperclip or a scrap of wire. The others require inexpensive tools that, while you might not have them on hand, are easy to acquire.<\/p>\n<blockquote class=\"admonishment_warning\"><p><strong>Warning:<\/strong> Do not open your power supply unit at any point during the diagnostic process. The internal components of a power supply unit are not user serviceable. Handling them without proper equipment and training can give you a lethal shock.<\/p><\/blockquote>\n<h3><span class=\"ez-toc-section\" id=\"Testing_Your_PSU_with_a_Basic_Jumper_Test\"><\/span><a rel=\"nofollow noopener\" target=\"_blank\" name=\"autotoc_anchor_2\">Testing Your PSU with a Basic Jumper Test<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<figure style=\"width: 1200px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-834255 size-full   \" data-pagespeed-lazy-src=\"https:\/\/www.howtogeek.com\/wp-content\/uploads\/2022\/09\/PSUMulti1.jpg?trim=1,1&amp;bg-color=000&amp;pad=1,1\" alt=\"Testing a PSU with a piece of wire.\" width=\"1200\" height=\"675\" data-credittext=\"Jason Fitzpatrick\" src=\"\/pagespeed_static\/1.JiBnMqyl6S.gif\" onload=\"pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\" onerror=\"this.onerror=null;pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\"\/><figcaption class=\"wp-caption-text\"><span class=\"imagecredit\">Jason Fitzpatrick<\/span><\/figcaption><\/figure>\n<p>The jumper test is the least detailed test. In a pinch, however, it will at least tell you if your PSU can power on (or if it\u2019s damaged in such a way that it can\u2019t even spin up and provide power to your computer).<\/p>\n<p>To perform a jumper test, you simply need a paper clip or a piece of wire with a gauge of 16AWG or 18AWG. You can purchase <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.amazon.com\/gp\/product\/B01N8Q0TOE?tag=lsmedia-4971-20&amp;asc_refurl=https:\/\/www.howtogeek.com\/172933\/how-can-i-test-my-computers-power-supply\/\">a jumper bridge tool, but it\u2019s a bit overkill for most people unless you troubleshoot power supply units all day.<\/p>\n<p>With your wire or paper clip jumper handy, here\u2019s how to test whether your PSU can turn on. These instructions assume that your PSU is currently inside your computer, and you\u2019re starting the troubleshooting process from there.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"  alignnone wp-image-834033 size-full\" data-pagespeed-lazy-src=\"https:\/\/www.howtogeek.com\/wp-content\/uploads\/2022\/09\/PSUTest1.jpg?trim=1,1&amp;bg-color=000&amp;pad=1,1\" alt=\"Color-cored ATX power pinout diagram.\" width=\"1200\" height=\"341\" src=\"\/pagespeed_static\/1.JiBnMqyl6S.gif\" onload=\"pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\" onerror=\"this.onerror=null;pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\"\/><\/p>\n<p>Refer to the ATX power pinout diagram above while following the instructions. Even if your PSU uses non-standard colors for the cables (such as all black, or a rainbow gradient), the pinout pattern should still be standard with the \u201cPower On\u201d pin located four slots over from the front side of the connector.<\/p>\n<ol>\n<li>Unplug your computer\u2019s PSU from the wall.<\/li>\n<li>Open your computer\u2019s case to access the PSU.<\/li>\n<li>Unplug the large 24-pin connector from the motherboard.<\/li>\n<li>Use your jumper to bridge the green wire (pin 16) to an adjacent black wire (pin 15 or 17).<\/li>\n<li>Plug the PSU back in.<\/li>\n<\/ol>\n<p>Bridging the green \u201cPower On\u201d wire to any black ground wire on the motherboard connector and then plugging your PSU back in should cause the fan on your PSU to spin along with any power indicator lights (if present) to illuminate.<\/p>\n<p>If bridging the green wire to an adjacent black wire does not turn on your PSU, it is safe to assume that the PSU is damaged and inoperable. If the unit is brand new, you should return it. If it\u2019s within warranty, you should file a claim.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Testing_Your_PSU_With_a_Multimeter\"><\/span>Testing Your PSU With a Multimeter<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<figure style=\"width: 1200px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-834258 size-full  \" data-pagespeed-lazy-src=\"https:\/\/www.howtogeek.com\/wp-content\/uploads\/2022\/09\/PSUMulti2.jpg?trim=1,1&amp;bg-color=000&amp;pad=1,1\" alt=\"Testing a PSU with a multimeter.\" width=\"1200\" height=\"675\" data-credittext=\"Jason Fitzpatrick\" src=\"\/pagespeed_static\/1.JiBnMqyl6S.gif\" onload=\"pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\" onerror=\"this.onerror=null;pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\"\/><figcaption class=\"wp-caption-text\"><span class=\"imagecredit\">Jason Fitzpatrick<\/span><\/figcaption><\/figure>\n<p>If you have <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/318722\/how-to-use-a-multimeter\/\">a multimeter in your toolbox, you can use it to perform a more detailed test on your power supply unit.<\/p>\n<p>While the jumper bridge test will only tell you if the power supply unit turns on, you can use a multimeter to test the connectivity and voltage between all the different pins. To do so, you simply need to short out the Power On pin and an adjacent ground pin with a jumper, as we did in the previous section.<\/p>\n<div class=\"product-box  \">\n<div class=\"product-img product-img-noaward\">\n<p><img decoding=\"async\" data-pagespeed-lazy-src=\"https:\/\/m.media-amazon.com\/images\/I\/41+kxKzqvPL._SL160_.jpg\" height=\"147px\" width=\"147px\" alt=\"\" role=\"presentation\" src=\"\/pagespeed_static\/1.JiBnMqyl6S.gif\" onload=\"pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\" onerror=\"this.onerror=null;pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\"\/>\n<\/div>\n<\/p><\/div>\n<p>Then you can connect one of your multimeter\u2019s probes to one of the ground pins, and then to each of the other pins on the connector pinout one by one to check if the voltage is correct.<\/p>\n<p>Our guide to testing your PSU with a multimeter includes detailed instructions for testing, not just the 24-pin motherboard connector but also your GPU and other power connectors.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Testing_Your_PSU_With_a_PSU_Tester\"><\/span>Testing Your PSU With a PSU Tester<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<figure style=\"width: 1200px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-834213 size-full  \" data-pagespeed-lazy-src=\"https:\/\/www.howtogeek.com\/wp-content\/uploads\/2022\/09\/PSUTester1.jpg?trim=1,1&amp;bg-color=000&amp;pad=1,1\" alt=\"A PSU tester.\" width=\"1200\" height=\"675\" data-credittext=\"Jason Fitzpatrick \/ How-To Geek\" src=\"\/pagespeed_static\/1.JiBnMqyl6S.gif\" onload=\"pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\" onerror=\"this.onerror=null;pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\"\/><figcaption class=\"wp-caption-text\"><span class=\"imagecredit\">Jason Fitzpatrick \/ How-To Geek<\/span><\/figcaption><\/figure>\n<p>Using a multimeter to test your PSU is great because many people have multimeters on hand (or can borrow one from a friend or neighbor). But it does involve a lot of fussing with the multimeter, poking pins, and it\u2019s hard to test small connectors like fan headers and SATA connectors.<\/p>\n<div class=\"product-box  \">\n<div class=\"product-img product-img-noaward\">\n<a rel=\"nofollow noopener\" target=\"_blank\" aria-hidden=\"true\" tabindex=\"-1\" role=\"presentation\" href=\"https:\/\/www.amazon.com\/gp\/product\/B076CLNPPK?tag=lsmedia-4971-20&amp;asc_refurl=https:\/\/www.howtogeek.com\/172933\/how-can-i-test-my-computers-power-supply\/\" onclick=\"fbq('track', 'Buy Button'); if (fb_t_convert){fb_t_convert();}\"><br \/>\n<img decoding=\"async\" data-pagespeed-lazy-src=\"https:\/\/m.media-amazon.com\/images\/I\/41l+vox+iyL._SL160_.jpg\" height=\"147px\" width=\"147px\" alt=\"\" role=\"presentation\" src=\"\/pagespeed_static\/1.JiBnMqyl6S.gif\" onload=\"pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\" onerror=\"this.onerror=null;pagespeed.lazyLoadImages.loadIfVisibleAndMaybeBeacon(this);\"\/>\n<\/div>\n<\/p><\/div>\n<p>Fortunately, dedicated PSU testers are quite inexpensive. Further, testing your PSU with a PSU tester is unbelievably simple. You just plug in the cables you want to test, turn on the PSU, and read the LCD screen readout on the tester.<\/p>\n<h2 role=\"heading\" aria-level=\"2\"><span class=\"ez-toc-section\" id=\"Power_Supply_Unit_Frequently_Asked_Questions\"><\/span>Power Supply Unit Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If reading this article in a bid to troubleshoot possible PSU problems has you giving serious thought to your PSU for the first time, we\u2019re here to help! Here are some common questions people have about power supply units.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_You_Have_Too_Big_of_a_PSU\"><\/span><a rel=\"nofollow noopener\" target=\"_blank\" name=\"autotoc_anchor_6\">Can You Have Too Big of a PSU?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can hurt your wallet by buying a super-size premium PSU when you don\u2019t actually need it for your particular build, but it won\u2019t hurt your computer.<\/p>\n<p>You can\u2019t <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/833331\/can-you-buy-too-big-of-a-psu\/\">buy too big of a PSU. Your computer will simply use as much power as it needs and leave the rest of the potential capacity of your PSU untapped.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Do_Oversized_PSUs_Waste_Power\"><\/span>Do Oversized PSUs Waste Power?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Putting a powerful high-watt PSU in your computer will only use as much power as your hardware requires. So in that regard, there won\u2019t be wasted energy by way of excessive consumption. However, there is one way that an oversized power supply unit can cost you money.<\/p>\n<p>Power supply units convert the alternating current (AC) supplied by the wall outlet in your home into the direct current (DC) used by your computer. The process is most efficient when the power requirements of your PC are around 50% of the rated capacity of the PSU.<\/p>\n<p>If your PSU\u2019s wattage rating is very close to the actual demands of your PC (such that it\u2019s running at nearly 100%) or extremely high compared to your PC\u2019s needs (such that it\u2019s running very low at 10-20% of the total capacity), there will be a decrease in efficiency. Practically speaking, however, <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/833580\/does-an-oversize-psu-waste-power\/\">power supply inefficiencies will only cost you a dollar or two a year, so that\u2019s hardly a reason to avoid buying a higher-rated PSU.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_Do_%E2%80%9C80_Plus%E2%80%9D_Power_Certifications_Mean\"><\/span>What Do \u201c80 Plus\u201d Power Certifications Mean?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When shopping for a power supply unit you\u2019ll quickly come across <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/805493\/what-is-80-plus-certification-on-a-psu\/\">PSU power certification ratings like \u201c80 Plus Gold\u201d and \u201c80 Titanium.\u201d<\/p>\n<p>These ratings are an industry standard that indicate how efficient a power supply unit is under an 80% power load. The most basic \u201c80 Plus\u201d certification indicates that the PSU is 80% efficient when placed under a 50% load. The efficiency increases with each tier up to \u201c80 Plus Titanium,\u201d which offers 94% efficiency under a 50% load.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Does_PSU_Quality_Really_Matter_That_Much\"><\/span>Does PSU Quality Really Matter That Much?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The poor PSU might get almost zero press time and none of the glory that flashier components like GPUs and advanced multi-core CPUs get, but <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/706624\/how-important-is-the-power-supply-psu-when-building-a-pc\/\">the humble PSU is the bedrock of a stable PC build.<\/p>\n<p>You don\u2019t need to buy the most premium PSU on the market, but you want to avoid no-name white-label PSUs. Stick to established companies with solid track records like EVGA and Corsair. Your PSU shouldn\u2019t be the PC component you splurge on the most, but it shouldn\u2019t be an afterthought.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_Reuse_My_PSU_in_a_New_Computer\"><\/span>Can I Reuse My PSU in a New Computer?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can absolutely <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/834443\/can-i-reuse-my-old-psu-in-my-new-computer\/\">reuse an older PSU in a new computer. Unlike many computer components that end up incompatible with newer builds (such as outdated RAM), PSUs are standardized, sturdy, and one of the PC components you should consider reusing.<\/p>\n<p>While we don\u2019t recommend reusing a twenty-year-old PSU from your old college computer in a new build, you can easily get ten years out of a high-quality PSU, so there\u2019s no reason to buy a new one every time you rebuild your gaming PC unless your new build has much higher power requirements.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_Reuse_My_Old_PSUs_Cables\"><\/span>Can I Reuse My Old PSU\u2019s Cables?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If you buy a new PSU to replace your old one, and they both have modular cables, you might be tempted just to unhook the cables from the old unit and plug them into the new one.<\/p>\n<p>We advise against reusing modular PSU cables because it can have catastrophic consequences. The physical power connections and their pinouts are standardized on the end of the cables (the part you plug into your motherboard or GPU), but the connections on the PSU side are not, and the \u201cpinout\u201d of the PSU is manufacturer dependent.<\/p>\n<p>This means if you plug a modular cable from one manufacturer into the PSU of another manufacturer, you have no guarantee the right voltages are going to the right pins resulting in a situation not unlike plugging in an extension cord without realizing the hot, neutral, and ground wires have been switched around.<\/p>\n<p>If you wish to reuse them, be sure to <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/833243\/psa-upgrading-your-psu-dont-reuse-the-cables\/\">identify and test your modular PSU cables to ensure the device side pinouts are correct.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"If_You_Upgrade_Your_GPU_Do_You_Need_a_New_PSU\"><\/span>If You Upgrade Your GPU, Do You Need a New PSU?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You don\u2019t necessarily need to upgrade your PSU if you upgrade your GPU. If your new GPU has power demands that will push your computer\u2019s total power consumption beyond the load rating of your current PSU, you will need to upgrade.<\/p>\n<p>Before you upgrade, however, it\u2019s wise to <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/832946\/will-i-need-a-new-psu-if-i-upgrade-my-gpu\/\">calculate your PC\u2019s power load with the new GPU instead of assuming you need to upgrade the PSU along with the GPU.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_You_Upgrade_an_Existing_PSU\"><\/span>Can You Upgrade an Existing PSU?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can upgrade an existing PSU, but with a noteworthy caveat. If you built your own PC, ordered it from a custom PC builder, or it is a prebuilt computer that uses standard ATX connectors, then it should be trivial to <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/348257\/how-to-upgrade-and-install-a-new-power-supply-for-your-pc\/\">upgrade your power supply unit.<\/p>\n<p>Several manufacturers, notably Dell and HP, have used non-standard power connectors over the years, making it a hassle to upgrade their prebuilt computers. If you attempt to swap out their propriety PSUs with a standard off-the-shelf PSU, you\u2019ll find that the connectors aren\u2019t compatible, the wiring pinouts don\u2019t match, or both.<\/p>\n<p>While it\u2019s possible to work around that with third-party adapters or even redo the wiring pinouts yourself, it\u2019s probably not worth the hassle, and it\u2019s better to replace the PSU with an identical OEM model or upgrade the entire machine.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Are_the_PSUs_in_Prebuilt_Computers_Low_Quality\"><\/span>Are the PSUs in Prebuilt Computers Low Quality?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The power supply units in prebuilt computers are not inherently low-quality. Some prebuilt computers are made by shops that use off-the-shelf parts, and you\u2019ll find a quality EVGA power supply in your \u201cprebuilt\u201d machine just as if you\u2019d picked the part yourself and installed it.<\/p>\n<p>But many prebuilt computers, especially the mass-produced low and mid-level offerings you at your local big-box electronics stores, have terrible no-name PSUs produced by the lowest bidder. This is one of the many reasons <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/773750\/buying-a-prebuilt-pc-9-things-to-check-first\/\">we recommend using a checklist when buying a prebuilt computer to ensure you get the build quality you want.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_Use_Two_PSUs_in_a_Computer\"><\/span>Can I Use Two PSUs in a Computer?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It might seem like a strange question if the thought hadn\u2019t crossed your mind, but it makes sense. When you need more RAM or storage in a computer, you typically add more, so why not do the same with a PSU? If you need 400 more watts because of your new GPU, why not just stack another PSU on the pile?<\/p>\n<p>Using <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/835337\/can-you-use-two-power-supplies-with-one-computer\/\">two PSUs with one regular desktop computer is possible, but it\u2019s not a very elegant, efficient, or safe solution. Unless you have a specific use case, we recommend upgrading your power supply unit and enjoying a simple all-on-one experience without any questionable hacks or workarounds.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_Capacitor_Aging_Really_a_Concern_in_PSU_Longevity\"><\/span>Is Capacitor Aging Really a Concern in PSU Longevity?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When you get into the weeds of PSU comparisons and performance, you\u2019ll find articles and discussions about <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.howtogeek.com\/794997\/what-is-capacitor-aging-in-psus-and-should-you-worry\/\">capacitor aging in power supply units.<\/p>\n<p>When buying a PSU from a reputable manufacturer with a good warranty, this isn\u2019t really something most people need to worry about. If you really want to max out the life of your PSU, however, you can look for manufacturers that use high-quality solid capacitors (instead of less expensive liquid ones) and offer 10-year warranties\u2014an excellent indication they expect their product to last.<\/p>\n<\/div>\n<p><script>\n setTimeout(function(){\n  !function(f,b,e,v,n,t,s)\n  {if(f.fbq)return;n=f.fbq=function(){n.callMethod?\n  n.callMethod.apply(n,arguments):n.queue.push(arguments)};\n  if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';\n  n.queue=[];t=b.createElement(e);t.async=!0;\n  t.src=v;s=b.getElementsByTagName(e)[0];\n  s.parentNode.insertBefore(t,s) } (window, document,'script',\n  'https:\/\/connect.facebook.net\/en_US\/fbevents.js');\n   fbq('init', '335401813750447');\n   fbq('track', 'PageView');\n  },3000);\n<\/script><\/p>\n<blockquote><p><strong><span style=\"color: #ff6600;\">If you liked the article, do not forget to share it with your friends. Follow us on\u00a0<span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/news.google.com\/publications\/CAAqBwgKMLG0nwswvr63Aw\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Google News<\/a><\/span>\u00a0too, click on the star and choose us from your favorites.<\/span><\/strong><\/p><\/blockquote>\n<blockquote>\n<p style=\"text-align: center;\">For forums sites go to <span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/forum.buradabiliyorum.com\/\" target=\"_blank\" rel=\"noopener\">Forum.BuradaBiliyorum.Com<\/a><\/span><\/strong><\/p>\n<\/blockquote>\n<blockquote>\n<p style=\"text-align: center;\"><strong>If you want to read more like this article, you can visit our <span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/en.buradabiliyorum.com\/technology\/\" target=\"_blank\" rel=\"noopener\">Technology category.<\/a><\/span><\/strong><\/p>\n<\/blockquote>\n<p><span style=\"color: black;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.howtogeek.com\/172933\/how-can-i-test-my-computers-power-supply\/\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;How to Test the Power Supply Unit (PSU) in Your PC&#8221; Hannah Stryker \/ How-To Geek Testing your computer&#8217;s power supply unit is fairly simple. You can test the PSU with a basic jumper test, multimeter, or power supply tester. This will help you rule out power delivery issues as the source of your problem&#8230;.<\/p>\n","protected":false},"author":1,"featured_media":548416,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/www.howtogeek.com\/wp-content\/uploads\/2013\/10\/PSUHeader1.jpg?height=200p&trim=2,2,2,2","fifu_image_alt":"","footnotes":""},"categories":[18],"tags":[],"class_list":["post-548415","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/548415","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=548415"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/548415\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media\/548416"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=548415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=548415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=548415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}