For me it's not the case i think.. CPU average 40C and System average 35C

I've been having similar problems with my computer, also a MSI K7N2. BSODs all over the place. It initially was running fine for about a month, then I happend to check my dxdiag screen and noticed that it was registering my processor as an XP 1500+ instead of a 2100+ so I decided to go into the BIOS and see if I could fix it to detect correctly. I got ahold of some specs for the 2100+ (1.733 GHz, 13X133 FSB, 1.60V core and max op temp of 90C) and tried to set the multiplier manually. Computer wouldn't boot after that, would give some beep code until I turned it off, pulled, clearing with the Jumper didn't seem to work either, so I popped out the battery, let it sit for about 10 Sec and put the battery back in (I did make sure the PSU was off and the flea power was gone before I tried either one)

It booted OK after that, and even detected as XP 2100+, but was having these IRQL_NOT_LESS_OR_EQUAL blue screens (was getting spontanious reboots until I found about about winXP's command to reboot on error and disabled it). I tried changing around the ram, that didn't fix anything (cause I had them in the slots to dual channel it), replaced the RAM with a matched set of generic PC2100 that I happened to have (also two 512 sticks) and that seemed to fix the BSODs, but now the computer will hard lock if I try to do anything that makes full use of the CPU (like SWG, or EQ, or Seti@home within about 5 min), runs fine for applications, but I play games, and have been gameless for the last week or so and am going into withdrawals.

I did a complete format and re-install of winXP last night, loaded all the latest drivers for video card and all the windows updates for XP and SP1 (minus Q811493 which has caused problems for me before) and it's still doing the lockups with full CPU useage. Tried in Safemode and it did the same thing, so I am thinking it's a hardware issue.

Since this all started when I tried to get the CPU to register as what it was instead of an AMD XP +1500 I tried underclocking it today to see how that would work. Set the multiplyer down to 12.5X and Core voltage down one notch (I think it was 1.57V, don't quite remember and can't look at the BIOS right now and type at the same time)

That seemed to work better, was able to run Seti@home for probably about an hour without locking up (didn't try SWG or EQ yet). I did get a BSOD when using IE which told me that NVnet.sys had attempted to write to read only memory Stop 0X000000BE.

A search on Google for NVnet.sys brought me to this thread, hope my info helps, and would appreciate any other advice anyone might have to offer to help with these problems.

Here's my system specs:

MSI K7N2 Delta-ILSR
nVidia NForce 2 Ultra 400 Chipset
AMD XP 2100+
1024 MB PC2100 DDRAM (generic)
MSI Ti4200 (Detinator 45.23)
Maxtor 60GB drive
Western Digital Caviar 120GB Drive (8 MB buffer)
ALink 20X10x40 CD burner
Pioneer DVD drive
Antec True Power 550W PSU