BleepingComputer.com: Computer Screen Goes Black, Screen Seemingly Loses Connection

hi all, a recent problem has occurred with my computer. whilst playing games, i can play for a few minutes, and then a black screen appears, with sound looping and the screen status colour changes from solid green to flickering green. This is XP Professional by the way.

My system is as follows:
P5N-E Sli Mobo
C2D E750 2.66ghz
2.0 gb ram
XFX 8800GTS 320mb

The games in which this occur are as follows:
Team Fortress 2
Grand Theft Auto: San Andreas
The Elder Scrolls IV: Oblivion
Guild Wars

However, what is strikingly odd about this problem is that it only occurs about 80% of the time. Yesterday, I managed to play Guild Wars, Star Wars: Knights of the Old Republic 2, Grand Theft Auto: San Andreas and The Elder Scrolls IV: Oblivion absolutely perfectly.

I have searched forums, and it seems this can be linked to overheating, but my temperature gauge on the front of the computer says I run at about 30 C most of the time, and the computer itself is not hot inside at all. All fans are spinning fine, no dust.
I have heard other issues such as graphics card drivers, and i have tried 3 different drivers, all of which did not overcome this problem.
Could it possibly be sound drivers? Or possibly something wrong with the motherboard?

Thanks in advance.


Mod Edit: Topic moved to more appropriate forum~ TMacK

This post has been edited by TMacK: 11 November 2007 - 12:57 PM

it may be bugs in those games, I'd check for any patches or fixes for them 1st.

i dont think its a problem in terms of each game, as it happens across the board on games based on Directx8 and Directx9.
the list in my original post are games that it has occured in, and could occur to any other games i have installed.

this problem is very odd, it has just occurred again on both Call of Duty 4 and Crysis, but I have not had any problems at all during the week....it seems as if it only happens on the weekend, as the last time it occurred was sunday 11th october.
i have no idea why this is happening, i fear its a problem with the motherboard, but im not 100% sure.