This is my first time posting so here goes:
I have an Asus A7n8X Deluxe motherboard (Revision 1.04 I think) with a GeForce FX 5700 video card. 2 Gigs of Ultra PC3200 Memory.
AMD 3200+ running w/ a 200 MHz FSB.
All of my memory timings are set manually to be safe.
I have tried many, many different things to fix the follwing problem. Here is the problem:
I received this motherboard after my original one died. I upgraded the RAM and I changed my two 21" CRTs out for 2 19" LCDs. I also upgraded the CPU. So I reinstalled Windows XP after doing a quick format. Things were acting very strange, for example every single driver I installed had a popup saying it was not Microsoft signed. It would lock up after about 20 minutes of use, so I reformatted, this time doing a full format. This time things were looking good, but after installing all the drivers, and itunes, the computer would give me a BSOD after using it for about 20-30 minutes. I began troubleshooting it with different RAM and a different video card. I ran Memtest86 overnight and the microsoft diagnostics over night with no errors. The CPU, RAM, and monitors are brand new. The motherboard I believe is refurbished. After spending hours on it, updating the bios installing the newest drivers, etc. I got nowhere. When running Itunes, it seemed to reboot more often after a little crackle in my speakers. So I tried playing music in itunes, a video off the web and running windows media player at the same time to reproduce the error and it would restart periodically, but I am not positive it was due to the media tests. The blue screens I received were IRQ_NOT_LESS_THAN I think, with nvmcp.sys and nvarm.sys being the mentioned files. So I finally reinstalled Windows again, this time going straight for the newest drivers. I did not install itunes and things were going great. I let it run for a few days and I checked my email every once in a while, so no serious work on it. I thought it was fixed, but then today while browsing the web, it just restarted on me, and since I reinstalled windows, I forgot to change it so that it doesn't automatically reboot on an error. Therefore, I don't know what the error was. I have memory dump file I can post if need be.
Other issues I was experiencing was in the displays. One of the displays would freeze. It was the actual image because I could move the mouse and click the X to close the program in that window, but the X didn't move. If it was the display without the task bar, the program I just closed would leave the taskbar, but it would still be displayed in the window. Sometimes the Start menu would not respond when you clicked it. If I pressed the windows key, the dotted lines would appear on the start button but nothing would pop up. Also periodically one monitor would flash black for a second and come back on. Sometimes it would do this when the program image was frozen. When it came back on the program would disappear. Also in task manager if I closed the program, it would disappear but like I said the image would still remain. I would actually go into the display properties and change a setting to force the monitor to refresh. It has not done this in a while, in fact since I reinstalled Windows, the screen has only flashed black once, but never had a program freeze. The monitors act like to different computers because when one of them does it, the other side still operates like normal. They both do it, so I don't think it has anything to do with the monitor, and it also did it with 2 different video cards.
I am thinking that maybe I got a bad CPU, which I just bought or the power supply is going, or my RAM is bad even though I have tested it and tested it and it is brand new. I don't want to keep sinking money into it, so if anyone can pinpoint the problem I would appreciate it. All of my temperatures run very cool, so unless my sensors are bad, temp shouldn't be an issue. My power supply is about 2.5-3 years old, but the voltages in Asus probe appear correct. Here are the voltages according to Asus Probe.
12 = 12.544 V
5 = 4.919 V
3.3 = 3.312 V
Also I will mention, I have been running Prime95 for about 20 minutes now with no problems. After installing itunes again, about an hour ago, it kept locking up when I rebooted. Finally in safe mode I did a restore to about 2 days ago and all is working fine, of course the main problem takes a while to show up.
Thanks for your help everyone, and let me know if I need to add any information. I have spent at least 20 hours troubleshooting it and I am at a loss.