computer keeps shutting off

[matt00926]

Specs

A64 x2 3800+ 2.0ghz (no o/c) w/zalman 9700 (temps never go past 55*c at stock voltage -1.35v, and thats with dual orthos)

Asus a8n32-sli premium 939 board (latest bios)
1 gig stick p3200 gigaram running stock
7800gt
antec tp2 430w psu
1 optical and 1 250g pata drive
audigy 2zs

As i mentioned nothing is overclocked at all. It doesn't even have to be playing games it just powers down sometimes out of nowhere while surfing the web or listening to music. I am going to be running orthos for about 24 hours and them memtest86+ for about the same but i did a memtest a few months ago for a day and no errors.

I have disabled automatic restart incase of any blue screens. I tried setting the voltage to 1.35 and the ram to 2.7 and when i booted up i got the following blue screen

c000021A fatal system error

0xc00000005

I have xp SP2 and it was doing this before and i formatted today and its doing the same shit. This is the first time i got the blue screen. I tried googling but people mostly say its something to do with norton (which i dont have) or something wrong with xp (this is a fresh format)

The lowest i have seen the 12v voltage drop to under full load in speedfan is 11.84 and the fan on the psu is spinning and is only warm to the touch on the back grating (even when i turn my 120mm on full blast and the psu is chilly it still shuts down)

Any ideas?

 

[MjrStryker]

As i mentioned nothing is overclocked at all.

Shouldn't this be under General Hardware then if it's not an overclock related issue?

Quote from Micro$oft's support site:

SYMPTOMS
When you start your Windows NT 4.0-based computer, you may receive the following error message:
Stop c000021a {Fatal System Error}
The session manager initialization system process terminated unexpectedly with a status of 0xc0000017 (0x00000000, 0x0000000) The system has been shut down.
After you receive this error message, your computer may restart so quickly that you are unable to obtain the details of the memory address. This symptom may prevent Windows NT from being able to write a valid Memory.dmp file. You may be unable to resolve this issue by disabling all third-party services, or by repairing your Windows NT installation by using an ERD.

Back to the top
CAUSE
The error message that is listed in the "Symptoms" section of this article is often caused by pending file-rename operations that are scheduled in the Windows NT registry, but that cannot be completed.

Programs or Setup programs may schedule a file to be renamed on the next restart of Windows NT if the program is prevented from renaming a file because the file is in memory.

 

[scrawnypaleguy]

I've got a similar system (opteron 175, same motherboard, same os) and I also have random shutoffs, but I haven't gotten any error messages at all. Also not overclocking, and temps stay below 50c (or go just barely beyond) under load. I have no idea what's causing it.

 

[matt00926]

Well i took my side panel off my sonata and orthos has been running for over 7 hours with no problems. I think the issue is the zalman 9700 is humongous and since the sonata is a rather small midsize case its blocking the intake fan on the bottom of the psu and maybe that is making the psu unstable and automatically shuts down to prevent damage