Hello, When i play games like Doom 3 and Quake 4 it lags very bad. I get around 5 Fps. My specs are 2.6 Pentium 4 Celeron 768 Mb Ram Gainward Geforce 6600 256 Mb (The card suppots Agp 8x but my motherboard inly supports 4x) Some games run very well such as Star Wars:Battlefront 2 and Call of Duty 1&2. I just wanna play Doom 3 i paid $90 for it and its unplayable. i thought my computer could handle it.

the Celeron is your big bottleneck. If it's the old Celeron 400mhz FSB and not the Celeron D with 533FSB that's even worse. Put it this way. The Celeron wasn't made for games like those especially if your screen settings are higher then 1024 by 768. You need to lower your screen settings to 800 by 600. AMD Athlon 64 X2 4600+ OC 2.7ghz 2GB Dual Channel DDR 3200 Nvidia 7900GT SATA II 2x 200gig 7200rpm 16mb cache RAID-0 Gigabyte Nforce 4 SLI

Overclocking an old Celeron isn't going to help much. if it's a Celeron D then you will have to overclock it 800mhz faster to see real preformance. AMD Athlon 64 X2 4600+ OC 2.7ghz 2GB Dual Channel DDR 3200 Nvidia 7900GT SATA II 2x 200gig 7200rpm 16mb cache RAID-0 Gigabyte Nforce 4 SLI

"I just wanna play Doom 3 i paid $90 for it and its unplayable" $90 for DOOM3?? It sells for $20 or less! Although your specs aren't great, you should obviously be getting much better than 5FPS. I would suspect a software problem rather than hardware...too many apps running in the background, spyware infection, etc

May want to try updating your drivers, too... www.nvidia.com Please help survivors of Hurricane Katrina! www.redcross.org

When you do upgrade your graphics drivers you will find in the display settings where you can select what game you are playing and it will set your graphics to play that game.

........huh?