Installed new CPU and Mobo, problems...

[c1v1c98]

My pc now runs the same if not slower than before, bad and fluctuating FPS in games. I have all drivers installed and Bios updated. My specs:

Abit IS7-E Mobo
P4 2.8g 800fsb
XP Home Ed.
512 RAM
Nvidia Geforce fx5200

I'm sure the problem could be me things, but I am a n00b, so any help/input is much appreciated.

 

[zerozero]

Same as MicroBell. Your mother board might not support your RAM speed. Check your MoBo specs and your RAM.

 

[c1v1c98]

I did reinstall my OS. And my ram is supported by the new mobo.