PC issues

[cartilage]

My Specs:
EVGA 01G-P3-1280-AR GeForce GTX 280 1GB 512-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card
Antec TruePower Quattro TPQ-1000 1000W Continuous Power ATX12V / EPS12V SLI Certified CrossFire Ready 80 PLUS BRONZE Certified
ASUS RAMPAGE FORMULA LGA 775 Intel X48 ATX Intel Motherboard
Western Digital Raptor WD740ADFD 74GB 10000 RPM SATA 1.5Gb/s 3.5" Internal Hard Drive
CORSAIR XMS2 DHX 8GB (4 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Quad Kit Desktop Memory Model Q2X8G6400C4DHX
Intel Core 2 Quad Q9550 Yorkfield 2.83GHz LGA 775 95W Quad-Core Processor Model BX80569Q9550
Antec P182 Gun Metal Black 0.8mm cold rolled steel ATX Mid Tower Computer Case
SAMSUNG 22X DVD±R DVD Burner Black SATA Model SH-S223Q LightScribe Support
Microsoft Windows Vista Home Premium SP1 64-bit for System Builders
Samsung SyncMaster T240

I built this last November. It took me roughly 2 hours to put together and since that day I have not had any problems. The roughly 2 days ago while I was in the midst of doing something it shut down. I attempted to turn it back on and the only thing to appear before it shut down again was the motherboards republic of gamers then it shut down again. I just left it off and came back around 6 or 7 hours later. It powered on fine and I went back to doing what I do. After about 10 minutes it powered off. I attempted to power it back on. With no joy. It continuously shuts down. I've stripped it down, cleaned every part and put it all back. It still shuts down. So, I go though and made sure everything was placed properly. But, it's not very complex. I left it alone for a while again. Then came back to it and it worked fine for about 4 minutes. Then back to shutting down. I read a few forums about people having simular problems and I notice my motherboards name comes up in conversation a lot. I just have no fault lights or beeps. I've tried to run test but, if I attempt to enter bios or anything it powers down. Does anyone have any ideas?

 

[Outlander_04]

are the cooling fans in the psu spinning?

you probably have an over heating problem , and the pc is turning off to prevent damage

 

[shortstuff_mt]

Sounds like either an overheating problem or a dead stick of RAM. What are your idle/load CPU/GPU temps?

Did you manually set the RAM speed/timings/voltage to the recommended specs in the BIOS (DDR2 800 @ 4-4-4-12 timings and 2.1v)? Have you tried each stick of RAM by itself in the first RAM slot? If that works, run Memtest86+ for multiple passes on each RAM stick to find the problem child. Memtest86+ is good for finding faulty RAM, but not so great at detecting incorrect RAM settings. I've seen RAM with the voltage set too low pass Memtest86+ but BSOD in normal usage.

 

[cartilage]

Fans are al working and overheating is not a problem. I cannot get into the bios. The computer shuts off after it's starting display. I've gone through attempting start up with each stick of RAM with no luck.

Any other ideas?

 

[jsc]

Defective power supply. I know that you have a much better than average PSU, but anything can fail.

 

[cartilage]

2 power supplies and no joy. It's still doing it.