but this one really has me going. The scenario I'm having is that I built a new
Pentium D 820 based system with a GeForce 7800GT PCIe card and 1GB of ram recently
and am having some issues with stability. More precisely, when I put the system
under very heavy load (the most extreme being running into Ironforge during peak
times while playing World of Warcraft and sometimes having a Skype conference also
going. This often involves lots of drive thrashing as it quickly tries to load massive
amounts of textures from the HD to the graphics card) my screen will occasionally
black out for 0.5 to 1 second, then come back. Most of the time it will do that three or four times
over about 5 minutes, then eventually it will flicker black, then immediately proceed
to a bluescreen. (IRQL_NOT_LESS_OR_EQUAL_TO most of the time)
Now, to make it even more interesting, CPU and GPU load doesn't seem to have too much of an effect on it, as I have run Prime95 (two copies simultaneously to max both cores) for about 12 solid hours with no errors at all. Also, using WoW as an example situation, I can play it and have Skype going for hours on end as long as I don't do something that involves massive loading sequences (such as it trying to load textures for hundreds of characters all at once when approaching the bank in a major city)
My system specifications are as follows:
Pentium D 820
Intel Desktop Board D945PSN
2x 512 MB DDR2-533
1x 200GB Seagate HD
GeForce 7800GT 256MB Graphics
Antec 500w Neo HE PSU
Sound Blaster Audigy
Now, here is what I have done so far...
I've tested the memory thoroughly, replaced the two 512MB sticks, and tested them
again in both single and dual channel modes with various timings just in case. (memtest86+)
Run a couple HD diags like Hitachi's DFT and Ontrack's little tool to check that.
Tested the power supply for issues with a couple different ATX PSU testers and a multimeter.
Checked for overheating issues on the CPU, northbridge, and graphics card. (all are falling well within acceptable temperature ranges)
Tried turning off many of the miscellaneous peripherals that are built onto the motherboard
(sound, parallel port, etc.) and have removed ALL non-necessary pci cards from the system while testing.
My next step will be to exchange the graphics card, as often the blue screen will
mention either nv4_disp.dll or win32k.sys
I'm going to zip and attach a set of about 5 minidumps, as they're itty bitty and may share some insight I'm missing when I looked them over with the Windows debugging tools.
Any ideas or suggestions would be greatly appreciated, as I'm past the point of frustrated