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· Registered
19 Posts
Discussion Starter · #1 ·
Hi, I've just completed my new build and here are the specs:

Asus GTX470 1280MB GDDR5 PCI-E Graphics Card
Samsung HD103SJ 1TB Hard Drive - 7200rpm 32MB Cache (SATA)
8GB (4x2GB) DDR3 1333MHz RAM @ 1.65v
AMD Phenom II X6 1055T 2.8GHz 9MB Cache (AM3)
Powercool 550W PSU
Asus M4A785TD-V EVO 785G Motherboard
Arctic Cooling CPU Freezer 7 Pro
Samsung SH-B083L 8x Blu-Ray player
Windows 7 Ultimate x64

The PC just randomly powers off, even when doing simple tasks such as browsing the net. I had to wait about 1 minute and then I could turn it back on but now it won't power on at all.

I have tried taking out the graphics card and RAM but still no power. The motherboard has a green light so there is some power getting through. All the fans work fine as well.
I think that the 550W PSU may not be capable of running my spec so I've ordered an 850W one. Is there anything I can try in the meantime to power my PC on?

Many thanks,

Lee :mad:

· Registered
142 Posts
Agree with makinu1der2. Although I am no expert on the matter, the minimum psu for the 470 is a 550w psu. Lets hope you did not damage any other parts of your machine from, most likely, an underpowered psu.

· Emeritus
51,728 Posts
When you get the, hopefully much better quality, PSU do a bench test.
4GB of RAM is more than sufficient for any game and almost all apps.

Remove EVERYTHING from the case.
Set the motherboard on a non conductive surface. The motherboard box is perfect for this. DO NOT PLACE THE MOTHERBOARD ON THE STATIC BAG! It can actually conduct electricity!
Install the CPU and heat sink.
Install 1 stick of RAM.
Install the video card and attach the power supply connection(s) to the card if your card needs it.
Connect the monitor to the video card.
Connect the power supply to the motherboard with both the 24pin main ATX Power connection and the separate 4 or 8 pin power connection.
Connect power to the power supply.
Do NOT connect ANYTHING else. Make sure you have the power connector on the CPU fan connected.
Use a small screwdriver to momentarily short the power switch connector on the motherboard. Consult your motherboard manual to find which two pins connect to your case's power switch. Then touch both pins with a screwdriver to complete the circuit and boot the system.

If all is well, it should power up and you should get a display. Then assemble the parts into the case and try again. If the system now fails to boot, you have a short in the case and need to recheck your motherboard standoffs.

If the system does not boot after this process, then you most likely have a faulty component. You'll need to swap parts, start with the power supply, until you determine what is defective.
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