I have just bought a new graphics because my 8600gt broke. My cod4 didnt lag and my pc couldent play gta iv... My new card is: HIS HD 4670 IceQ Edition 1GB VGA DVI HDMI PCI-E Graphics Card And system specs: 3ghz intel processor.. 4gb ddr2 ram 160gb hdd HIS HD 4670 IceQ Edition 1GB 700w psu xp service pack 3 My cod4 gets 125 fps... then it drops to like 4-20 fps for 2 seconds sometimes then after 5 mins in game it stops..or other times I get lags... It on low resolution 1024 x 800 think it is... The card should also run GTAIV... Its on youtube my card playing GTA IV on loads of people pc's with low cpu's... I thought my pc speds shud at least run it on everything low.. My 8600gt just about run it on low better then thid card so ? I aint checked for latest drivers yet so maybe that could be resason.. But How do I stop cod4 lag... Even If my fps is always above 100-125 sometimes it just drops.. People told me its punkbuster but surely it dont drop it to like 4 fps at times or 40.. Please Help! I also get this error now: UAA HD Bus driver is missing and needs installation disk. I aint got windows **** at moment. I think I found a fix on google tho. I reinstalled sound drivers but stil getting it.. Hopefully the thing I read mite work.. Any help appreciated..