Newly Built Computer, Will Not Stay On For Long

sepulveda

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Mar 19, 2009
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I just built a new computer. I will list the parts below.

RAM: http://www.newegg.com/Product/Product.aspx?Item=N82E16820134012

Motherboard: http://www.newegg.com/Product/Product.aspx?Item=N82E16813188036

Processor: http://www.newegg.com/Product/Product.aspx?Item=N82E16819103274

HDD: http://www.newegg.com/Product/Product.aspx?Item=N82E16822136075

PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817148027

When I first turn it on, It will stay on for about a minute. If I try again, it will power up and then turn off approx 3 seconds later.

Also I noticed that after it turns off, the NUMLOCK key on my keyboard will remain on even though the computer is now off.

Any help would be appreciated.
 

sepulveda

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I narrowed it down to the CPU power supply. When the 4 pin is plugged in, it resets every 30 seconds or so, when it is unplugged, it runs continuously. Would this be a problem with the PSU or the motherboard?
 

sepulveda

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I have had many people tell me that it is my PSU. Since my motherboard uses an 8 pin. Should I find a PSU with an 8 pin connector or would a PCIe 6+2 work just as well. What do you recommend?
 


The PSU that you selected is one step above junk.

If the replacement PSU does not have an 8 pin EPS connector, plug the 4 pin connector into the 4 pins closest to the CPU socket. The plug will only fit one way. DO not use a 6+2 PCIe connector there. It's wired wrong. If you managed to plug it in, you would groung the 12 volt output. Hopefully, the protection circuits in the PSU would electronically shut it down before damage occured.
 
Although I used a couple of those particular PSUs in low-power rigs a few years ago, I'd agree with jsc that they're really only a step above junk.
Your symptoms are consistent with an overheating problem. If you go into your BIOS to the "PC Health" (or similar) screen, what are your temps? Are they climbing?
 


What case do you have, how many fans is it running, and what video card are you running?
 


Here's another good psu for the same price as that Antec, but it has better specs.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817341021 $59.99
OCZ Fatal1ty OCZ400FTY 400W ATX12V / EPS12V Active PFC Power Supply - Retail
 
As Why_Me asked, what case do you have? Depending on where it has places to mount fans, in a typical mid-tower ATX case, fans in the rear and top (if present) are exhaust, and fans in the front and/or side are intake, in order to create a balanced flow of air through the case.
I just noticed that you bought an OEM CPU, which means it did not come with a CPU cooler. What CPU fan did you put on it? If you didn't get one (it isn't on your list), you'd get exactly the symptoms you are describing. The CPU MUST have a heatsink/fan attached to it, with a thin layer of thermal compound sandwiched between them.
 

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