Right, so for the past few months I've been trying to work out what the heck is going on with my graphics card/GC driver. When I'm playing some games the picture the disappear; the monitor will briefly turn off and then come back on (I think this is Vista restarting the driver) and the picture will come back - during this time with a blank screen the sound will loop over and over again. In Source games the game will crash and Vista will report said error about the driver whilst in other games it will just continue and when I exit I'll have a bunch of nice notifications in the taskbar with said error.
It does this for some of my games (including TF2). At first, it was only for Orange Box+ source games however turning the DirectX level down to Dx. 8 fixed the problem. On a weird sidenote, Left 4 Dead 2 works happily and has decent frames at full graphics. Before the engine was updated, I didn't have a problem with HL2 (and EP1) either, but since the engine upgrade it's been behaving in a similar manner as well.

The only difference between these cases are that everything bar L4D2 I have downloaded from Steam whilst L4D2 I have a retail copy of. This issue also seems to keep happening on Railworks (yes, yes I know!

) as well which doesn't have the ability to downgrade the dx level.

Trackmania also has this problem, although daylight levels it's fine with it's just the darker levels and the bit at the end on multiplayer races with all the cars and the final results.
I was just as puzzled when games I consider to be quite demanding have never had any problems: Civ5; Burnout: Paradise; Empire: Total War; Tropico 3; Moonbase Alpha and Borderlands.
What I have tried:
- Reinstalling problematic games.
- Uninstalling Driver and reinstalling driver.
- Installed Dx. Redist.
- Underclocking my graphics card.
- Increasing graphics card fan speed.
System Specs:
- CPU: Intel Pentium Duo E5200 (2.5Ghz)
- Graphics card: nVidia 9600GT (Sub-vendor: BFG, manufacturer overclocked.)
Speccy Info
- Motherboard: Asus P5Q-PRO
- OS: Windows Vista, 32-bit.
- RAM: 2GB
Any help + suggestions would be appreciated.
Thanks.
