Just built a gaming pc but it won't boot?

grob1996

Reputable
Aug 17, 2014
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4,510
I have recently built my own pc (using same parts and method from jackfrags recent budget pc video), and the first 3 days the pc worked perfectly, booted quickly and I was really impressed. However recently the computer has just refused to boot up at all. The problem has occurred totally randomly and only hours after the pc was working fine.
What happens is when I press the power button, the lights come on, the fans turn on - as you'd expect - however about two seconds after pushing the power button the whole system just dies.
After the system has died for the first time, the lights and fans won't even come on when you push the power button and you need to turn the power supply off and on again before the system responds to any use of the power button.
I have absolutely no clue what is causing this especially since the system worked so well for the first few days.
Could anybody tell me or hazard a guess as to what's wrong? I've spent well over £500 on components and software and for the pc to just not turn on is utterly heartbreaking!

My components are as follows:
Sapphire Radeon R9 270X dual-X 2GB Graphics Card
AMD FX-6300 Black edition 6-core processor
EVGA 500W 80 plus power supply
Seagate 1TB HDD
Ballistix 8GB (2x4GB) 1600MHz RAM
LG BD-ROM/DVD rewriter optical drive
BitFenix Comrade midi tower ATX case
Gigabyte 970A-UD3P AM3+ motherboard

OS:
Windows 8.1 64 bit

I have checked all connections and im sure they are all intact. HELP PLEASE?!
 
Solution
I'd start by checking your power supply to make sure it's working correctly. For the components you listed there is a chance you are not providing enough power. The extra strain on your PSU may have caused it to fail. I ran your components through a PSU estimator, and it said 800-900 watts for 1 video card 1200-1400 for 2.

You can always disconnect everything except the CPU, memory, and see if stays on then. If so, try it with the graphics card. Keep adding things (with the power off, of course) until it fails. If it won't stay on with just the CPU, and memory, then definitely check your PSU.

Spacemoss

Reputable
Aug 15, 2014
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4,520
I'd start by checking your power supply to make sure it's working correctly. For the components you listed there is a chance you are not providing enough power. The extra strain on your PSU may have caused it to fail. I ran your components through a PSU estimator, and it said 800-900 watts for 1 video card 1200-1400 for 2.

You can always disconnect everything except the CPU, memory, and see if stays on then. If so, try it with the graphics card. Keep adding things (with the power off, of course) until it fails. If it won't stay on with just the CPU, and memory, then definitely check your PSU.
 
Solution