Its definitely overheating. I had a similar issue after my card on my laptop overheated and my screen would go all nuts. I would still get sound and the PC would still be running, but the display would either go blocky or would look like that.
Just wondering, does it start to do it with Half-Life 1 based games? What about any other games? Source, etc? This is just for my reference, as i remember my card constantly doing it with HL1 based games, but in HL2/UT2004/Rainbow Six 3 it wouldn't occur as often.
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Originally Posted by Brad
That sounds like a really good idea!
Now replace the word "good" with "dumb".
What was your rationale for proposing such a thing?