Ok now this is just the weirdest thing ever. My graphics card is Nvidia GeForce 8600 GT and I get a frame rate of 20 and under in DOOM 3 even on low quality. You can even see my specs here: www.xfire.com/profile/doomlancelot bottom of the page. Does anyone know what's causing it and if there's a solution for it?
I'm going to go out on a limb and guess XFire is causing it. A while back, when I had XFire, it would lag all of my games down to 20 fps or so, then turning it off brought them up to 60...
I honestly don't know. I should reinstall Doom 3 to see how it runs on here, since last time I played it was on a Radeon 9600XT... I'll get back to you on that one.
Have you updated Doom 3 to the latest version? My copy was a bit tempermental until I got the patch. Failing that it might be a hardware conflict, if your graphics card has a fan make sure it's still working. My brother had a similar lag on games for a while and that was the problem also it fried the motherboard's north bridge (whatever that is?)
Well I'd suggest wiping every trace of the program and do a nice clean install, unless you've tried it already. The only other thing I can think of that could be wrong is that the game might not like your soundcard, try running Doom with the sound off (or with the card disabled in device manager) and see if thats the cause. If it isn't either of these things i'm stumped!
Heh, what vid card? You have the GF8600gt, right? Hmm... seems silly that the card can't handle the multiple monitors. Maybe the engine was poorly coded in that respect?