What I know so far: It happens generally anytime after boot, right after boot, during login process, at the desktop, playing a game, doing work, browsing web, It mostly happens within 10-15 minutes after boot, but it will occur an hour or so after using the computer for general use or during a game, etc...
I'd like some additional opinions/help if anyone cares to aid me in my new found troubles. There is a bit of history to my computer, so bear with this as I describe the actions, issues I had in the past. My current thinking is that my motherboard is having problems, but it could be something else.
System specifications (Self built):
Intel Q6600 Quad Core 2
6Gb DDR2 800(PC6400) (2x2G, 2x1G) RAM
EVGA GeForce GTX 460
OCZ 650Watt Power Supply
Hitachi 500Gb HD
Asus P5K motherboard (Onboard RealTec Audio & network adapter(i think)
ASUS DVD & Lite-on DVD+-RW drives
Currently using a DLink PCI network adapter (part of the story)
Windows 7 Home premium 64bit
(did I miss anything important)
Things I have done:
I run speccy and nVidia monitor, and I'm positive this is not a heat issue, my system has really good air-flow and temps are good:
Idle temps: 22C Graphics, HD: 20C, MB 32C, CPU: 37.
Besides, after being off for a day or so, on boot up, it could be up for about 2 minutes, and shutdown.
I'v tried downloading memtest and run this off USB boot, but I experience shutdowns (no errors indicated thus far, but I have yet to get through a full memory test, it will usually shutdown somewhere in the process, I've seen it as far as about 30% complete, but I don't wait around for it to finish.
Power to room: I haven't done much here, except change outlets and circut, put on UPS, etc.. no effect on issues. Other equipment is not turning off either if on same power outlet or circuit.
Network card issues::
After about 3 months (initially having Vista, and about a month after upgrading to Windows 7), my computer started taking a very long time to boot. Rummaging through posts and doing my own diagnostics, I found that after disabling the onboard network controller, the system booted fine. I ended up purchasing a Dlink PCI network adapter and have had success for about 2 years running with this. (meanwhile working with Tech support from ASUS, but not getting anywere, because they would call anywhere from 11:30pm-1:00am my time, I gave up on them, even though it was under warranty).
Some research indicated that an drive update published through Windows updates created some havoc with people that had the p5K motherboard. something do do with Realtech being acquired and new company releasing drivers not tested very well, or similar.
Video Card issue::
About 6 months ago, my computer wouldn't POST, at the time I had an EVGA GeForce 8800GTS video adapter, so after borrowing a friends 9600GT adapter, and testing with that. It would POST fine. Worked with EVGA an issue they agree'd its probably the video card. Unfortunately, I missed the boat on this warranty because It was lifetime and i didn't register this within the timeframe to claim a replacement, otherwise, i they would have shipped me a new one. well, I wanted to upgrade anyway, so I purchased a 460GTX, and the problem was solved. (btw, I didn't get to test my old one on someone else's computer to see if that had issues)
Current Power Issue::
So with the old Motherboard issue, and testing, I have come to the conclusion, that it just might be the motherboard, I'm not sure what else I can test.
Anyone have some other ideas? I'm about to pull a trigger on a new MB, btw with isn't easy with the Socket775, 4 memory slots, ATX form, ...just might have to do some additional upgrades (DDR3 ram...)
----- updates -----
2/10/2012 - I have tested by just going into BIOS and letting it run. It did indeed power off.
2/10/2012 - In process testing Power supply as indicated below
Edited by bishopk, 10 February 2012 - 10:55 AM.