SWITCHING OS AFFECTS my FRAMERATE...

Before switching my OS, my 2k9's frame rate can clinch to 35-38 frame rate, but after I switched to Windows XP Pro SP3(I have Windows XP home before though) my frame rate slows down to 15-19... What do you think the problem?

Run MSCONFIG

Disable All Programs Under Startup

Restart

Video Card?

CPU?

HD?

Sound Card?

Memory?

NastyNacho1, what do you mean by disable programs under start up>?

i have 9400gt, CPU Core 2 duo 2.66Ghz,HD 160gb, 2gigs of RAM.

Yeah it does change when you change os's btw may i ask what version are you using pro version or the home version?

if i were you try vista it really can make your fps higher in my case i tried the 32 bit version of the xp pro sp3 my fps of nba 2k9 will only reach up to 45-55 but when i tried vista ultimate 64 bit my fps went higher it became 60-75

Kris, Are you sure with this?

btw, I am using Windows Xp Pro Sp3

Yeah im pretty sure i am now currently using the 64 bit version of windows vista ultimate and im having good fps with my games

how about the 32 bit ultimate vista version, you think it will improve my fps in games?

and also windows 7 beta?

Lulz.

Did you install new Nvidia drivers from their website when you switched or did you just let Windows install drivers?