I seem to crash when rapid particles are activated

[Maximus]

For example:

Explosions = CRASH
Fire = CRASH
Lots of bullets (atleast 100) = CRASH

But when the explosions and fires are just textures, then it won't crash. This also affects me in ALL the source games AND it started ever since I forced -dxlevel 80 on them. I tried turning off my configs, it still won't work. I tried verifying integrity of game cache, even that won't work. I've even tried uninstalling. Please help, I wanna actually play online.

[Maximus]

:(

[editline]03:50pm[/editline]

D: