I have been attempting to diagnose random computer crashes for a few days, and have been unsuccessful so far. I had a desktop that I build a year and a half ago which I ran Linux on. I never had problems with it, and several times saw 30-90 days of uptime.
A few days ago I reformatted the hard drivee to install 64-bit Windows 7 Pro. At the same time I installed a new DVD R/W drive. After the first install of Windows, I also added a second used but working 1TB Seagate drive (identical to the boot drive). I don't know for certain if the problems started right then, or if they began somewhat later. All I know is that before I had the system entirely up and running it began crashing randomly. The screen goes black and a couple seconds later the computer restarts. It is also throwing POST codes that I have been unable to decipher. It has AMI BIOS, and the codes sound like a long beep, pause two beeps, pause one beep followed quickly by two more. I had real trouble counting the later beeps. I am not sure if this is two/three memory errors on top of each other or what. I don't even know if they are related to the crashes.
Things I have tried:
- Windows disk check
- Windows memory check
- stress test the CPU with Prime95 for several minutes.
- stress test the GPU with Unigine valley benchmark
- remove the new hard drive
- remove 2 of the 4 sticks of RAM at once, testing each pair
- reinstalling the video driver
I don't have integrated graphics, so I can't try removing the graphics card. All the tests pass. The crashes appear to be independent of load/time powered up. I've had it go all night without a problem only to crash minutes after a restart. I also just turned off the automatic restart to see if any warnings are actually printed.
If there are any more specs/tests you need please let me know, but I am currently at a loss as to what to try next that could help me sort out what is wrong.
- Core i5 - 2500 @ 3.3 GHz
- NVIDIA GTX 560 Ti
- 4 x 2GB RAM
- 2 x 1TB Seagate 7200