A power supply is an electronic device that supplies electric power to another device, such as a computer, monitor or printer. This is achieved by converting wall power (or mains power) to a lower voltage, and in most cases also from AC to DC. Most power supplies also provide protection from ...

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135 views

Can't screw PSU to computer case

As a software engineer willing to know more about hardware, I have started the dangerous quest of mounting my home computer myself. The part I've been struggling the most so far is screwing things ...
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1answer
73 views

Weird alarm sounding on my computer when under load, but no overheating

I am having a rather odd hardware issue and to be honest, I am not quite sure what is causing it. I have been building my own systems for over 10 years and have all kinds of qualifications, but this ...
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2answers
60 views

Power suppply sounds like a hard drive being defragmented

Came back from a holiday and noticed that my computer makes a new sound: the sound of a (quiet) hard drive being defragmented, i.e. reading/writing lots of data. Was worried it was one of my hard ...
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83 views

UPS will work on power but not battery

I have an old APC Back-UPS 200 I'm hoping to use for my PC. Connected to power it works fine. When unplugged it emits a "i'm on battery power" constantant tone. The 2 plugs on the back are not ...
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36 views

Are my devices severely underpowered?

I have a terrible setup. But first, let me say that I used a voltage meter to get a reading from my outlet, and it was starting at 119.5 volts right off the batt, with nothing plugged in. I am ...
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56 views

Powering a HP BL680c Blade Server Without a Rack

I picked up an old HP BL680c from a computer surplus store and have no rack with which to power it. The board seems to indicate that it merely requires 12V in. When I try to run it off of regular 12V ...
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2answers
99 views

Need assistance in connecting my PSU fan cable

I noticed that my PSU got really hot during gaming (to the point where it shut down my computer). I searched my PSU's model name (AXP-630P12P) and it said that the fan on the PSU was supposed to start ...
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2answers
94 views

Melting/smoking Universal AC adapter

So I own a Samsung RV520 for 2 years now and 3 months ago my AC adapter stopped working and had to replaced. I went to the closest computer service and they gave me an universal AC adapter. Now, the ...
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1answer
93 views

PSU coil whine, black screen & loud gpu fan (need help)

As of 1 week ago my computer started having some really weird coil whine coming from the PSU, and my monitor became black a few times and you could hear the GPU fans go 100%, so i instantly went and ...
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1answer
107 views

Battery recharge functionality broken due to short in AC adapter?

I have a problem recharging the battery of my netbook, an ASUS Eee PC 1025C. Since last week the LED of the AC adapter doesn't light up when it is connected to the wall. The netbook won't turn on ...
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1answer
63 views

Computer crashes when streaming Team Fortress 2

New computer. Played TF2 for 15 minutes, computer crashed and on boot it said something like PC shutdown because of power supply surge detected. I fixed the problem by playing TF2 at the worst ...
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43 views

Hard drives not always recognize

I'm having an issue. 80% of time when I power on my computer my hard drives aren't recognized (on BIOS). It's really random. I have a 4770k i7, an asus maximums IV hero, an SSD kingston 128g, a ...
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18 views

Darker patches on laptop monitor

I have a Lenovo G560 laptop, and the monitor is a LG Philips LP156WH4-TLA1. I have noticed some darker patches, like two of them, to the right of the screen that are slightly darker than their ...
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2answers
62 views

Laptop won't boot without power cable connected

My laptop is an Acer Aspire 5750 that used to run Windows 7 but is now dual-booted with Ubuntu 12.04 (now my predominant OS). Recently an annoying bug developed in that my laptop won't boot without ...
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1answer
170 views

Checking if NVIDIA graphic card crashes due to an underpowered PSU

I've started playing some newer games lately and encountered frequent, intermittent crashes printing errors such as DXGI_ERROR_DEVICE_HUNG, DXGI_ERROR_DEVICE_REMOVED, or similar. Researching reduced ...
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1answer
129 views

35% Maximum Frequency in the Windows Resource Monitor

I have a problem with my CPU as it runs over 100% on battery yet it doesn't go beyond 35% when plugged in. Yes, I've checked power management options like a million times for high performance and ...
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2answers
1k views

Can using the wrong power supply slow my computer down?

I have a Dell Studios XPS 1640, and it requires a 90W charger for use. I lost my power cable, so I'm now using a 65W charger. My computer has slowed down noticeably whenever it is charging. The ...
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2answers
200 views

Can a motherboard work when only supplied with ATX12V?

I am thinking of making a silent NAS for 3-4 people. Today I bought: 4TB Western Digital HDD 2x4GB DDR3 204 pin RAM Supermicro X10SBA motherboard which has 24 pin and 4 pin power connector. Does ...
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1answer
28 views

After building first computer, powering on works for only 2 seconds until it switches on and off infinitely

I have built my own pc, with z87x - UD4H / i5 4670k / 770 GTX. I installed the CPU / stock fan / connected it to the MOBO. Connected the 24 pin power supply Connected the GPU / Ram / Sonar DX audio ...
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26 views

No Video Until I Restart My Machine On First Boot, Then Black Screen Before Windows Loads Desktop

Here are my computer's specs. Windows 7 Intel i5 3570k EVGA 780 When starting my computer for the first time in the day, nothing will show up on the screen until I push the button again and turn it ...
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38 views

Does the laptop power supply the SATA drive from battery even being powered off?

I have a Fujitsu Lifebook s762 with a native SSD drive. After a couple of months or so - the SSD became the "brick". I read the article and remembered, that just before the failure, I shut down the ...
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24 views

Gtx 780 upgrade seasonic g series 450rm

as of right now I have a seasonic 450rm power supply with 37 amps on the 12v rail. Its powering a mini itx motherboard with an i7 4770k on it and 16gb of 1.5v memory. The i7 is over clocked to 4.3ghz. ...
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2answers
58 views

Losing monitor input - PSU or GPU suspect

I randomly lose video after playing games once in a while (mainly guildwars 2) regardless of graphics quality. Computer still produces sounds and appears working, but monitor reports no input. I ...
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2answers
1k views

Can I use a GeForce GTX 750 Ti graphics card in Dell Precision T1700?

I want to buy a Geforce 750 Ti for my Dell Precision T1700. But I'm worried if the power supply is sufficient. The Dell Precision T1700 has a "365W 90% efficient (80 Plus® Gold Certified)" PSU and ...
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1answer
44 views

Connect a Codegen 200XA power supply to an Asrock H61M motherboard

I am trying to use some computer parts I found at home to build a computer for my parents. Currently I have a Codegen 200XA power supply, but it doesn't seem to have an ATX12V1 conector which I need ...
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26 views

Shorted laptop due to human error

One of the kids put the end of the universal charger on the wrong way round, then plugged it into the laptop. Now neither the charger nor the laptop will work. I'm no power supply expert, but I'm ...
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1answer
385 views

PSU Power Supply makes a high pitch sound when pc is off

Let me be clear about a few things. The power plug is plugged into the PSU (obviously) but the power switch is turned ON. If I turn off the switch with the plug is still plugged in, the noise or sound ...
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110 views

Virus through power supply

Is it possible to get a virus through a power supply for a notebook? I mean not a battery but really the power supply itself. I heard that there is a chance for IOS.
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20 views

POST Beeps - was my mobo playing taps? Now it won't power on

I have an Asus P5Q Pro Turbo mobo. I use it for a file server for home. It's in a case with a total of 8 SATA drives, mostly the green eco type, of various brands. Four are connected on the mobo, ...
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2answers
121 views

Multiple PSU rails: How do I find out which is which?

The title explains it all: I have an Antec VP-450 PSU and it has two 18A 12V rails. There are two yellow wires which I assume are 12V: one is solid yellow and the other has a black stripe. (The yellow ...
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2answers
127 views

No video output on GPU or MOBOTHERBOARD (pc does nothing?)

I have a pc from 2007, the issue is, the power LED is on, like normal, when the following cable is disconnected: But, no GPU or BIOS VGA output. When I connect it, the CPU fan spins, normally, ...
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363 views

Battery detected but not charging (remains 0%)

I've recently bought a new, 6600 mAh battery for my Acer Aspire One Netbook (AOA110, ZG5 Model) that refuses to charge. My adapter will charge the old battery (although it only lasts 10 minutes), so ...
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1answer
55 views

Computer won't start back up. [duplicate]

I unplugged everything from my computer a couple of days ago because I had to move it. After half an hour later I plugged everything back but my computer wouldn't start. It's a HP desktop. Here are ...
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1answer
172 views

Debugging a “Somewhat” Faulty PC Component

TL;DR: I have a component that fails very infrequently, preventing my computer from POSTing (I am suspicious that this may be a motherboard issue). Since I cannot reliably reproduce this error, what ...
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235 views

How much power can a 3/4 pin fan connector handle?

I was thinking of buy 5 very high power 120mm fans. These ones to be sepcific. Delta PFB1212UHE. These fans require a lot of power. They are 4 amp, 48 watts. They sell them with the 3 pin ...
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2answers
145 views

Either my CPU, motherboard or PSU is bad. Which one is it?

I've asked a question here before, in December 2013, about a hard drive I wasn't sure whether it was bad. Turns out it was just a side effect from a bigger problem. Symptom: It started with Windows 7 ...
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21 views

Full CPU power with AC power and battery

How to check if my computer (Lenovo, Intel Core i5 running Windows 7 64bits) is running with full CPU power when both AC powered and battery-powered ? There are so many places (BIOS, Windows control ...
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122 views

Planning out an NES PC build (on the cheap) [closed]

I'm in the process of building a PC inside an NES case. I'm trying to get as much power out of it without breaking the bank. Rigging up the power switch and reset has been well documented, so this ...
2
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1answer
57 views

Computer is OFF, and fans turn on and off twice a day

We have an OptiPlex 755 desktop acting quite strangely here. It's powered off, not in standby or hibernate, and from time to time it will just start spinning its fans for a few seconds, and then turn ...
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2answers
58 views

Using a U.S. router with U.S. power supply in India

I took a Belkin Share Max N300 router bought in the USA and connected it directly to power in India. Specifications of the router's power adaptor are input 120V AC 50/60Hz 0.5A, and the output is ...
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13 views

HP J8156A Vernier network adapter

I've got a network card, that may or may not be working that I am trying to use in my home server. Got it from ebay as "used".The card does not let the computer boot, the computer turns on, but ...
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143 views

Can I Power the front-panel USB 2.0 ports with the power supply's 5V rail?

I have a high power (700ma+) USB device I wish to use on a single front-panel USB port. The USB specification in Wikipedia states: The USB 1.x and 2.0 specifications provide a 5 V supply on a single ...
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1answer
175 views

The registry cannot load the hive (file):

Yesterday I had a fully working PC... I was typing away when suddenly the screen went black. I thought there was a power cut but then realised it was only my PC that had fallen silent. Because there ...
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1answer
33 views

pc turns on but display nothing

I turn on my pc all the fans and leds working but no Beep and nothing on the display then on turn it off and on again it works fine with NO problem then I turn it off and the same scenario again and ...
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1answer
60 views

9 Bleeps Installing new GPU - Black Screen

BIOSTAR TH55B HD Intel i5 760 2 x 4gb ddr 3 ram 600W PSU 1TB Samsung HD105SI ATApi iHAS124 CD/DVD Windows XP I am trying to install my new msi radeon r6950 twin frozr iii However when I install it ...
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72 views

I have a issue with my Power Supply and Graphics Card I think

I recently am doing a new build and I am having a problem with the video card. I am using the EVGA 03-P4-2888-KR 780 Ti Classified Graphics card, on a Gigabyte GA-X79-UP4 Motherboard with an Intel ...
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69 views

Compatible power supply for Radeon 280x Graphics Card

My friend and I just bought 2 Radeon 280x graphics cards, found here: http://www.newegg.com/Product/Product.aspx?Item=N82E16814127759 In addition, we have an older PSU ...
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1answer
15 views

power supply without original fan

Original fan (120 mm) rotates fast and makes quite a big noise I replace original fan with 140 mm fan which makes little noise. Original fan was located ~ 5 mm from other parts of power supply. The ...
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1answer
62 views

Desktop Computer - One Second Shutdown

Hello superuser community. My computer just died on me yesterday, I've spent over five hours trying to figure out what broke but had no success. My computer's hardware CPU - Intel I5 2500K @ ...
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1answer
363 views

Can I run a Lenovo T440p I7 4600 M (Dual Core) with a 65W power supply

I'm thinking about ordering a T440p with a I7 4600M cpu ... It comes with FHD Display, the nvidia graphics chip and the integrated intel chip. They deliver it with the 90W power supply but i was ...