StSanta, what operating system are you using? The reason I am asking is this. I recently installed a new mobo, and cpu along with 256 DDR memory. Anyway, I just changed the boards out placing a new board with an athlonXP 1600cpu and the new DDR, pluged in the same hard drive , CD ROM and floppy and away I went. I also have a GeForce3Ti 200 video card. Guess what, I hardly showed any increase in frame rates also.
I mentioned this in the tech help section of the BBS. I changed from an athlon950 to an athlonXP 1600 and expected to get a very sizable gain in FPS. I am running windows98SE as my OS. StSanta if you did not reinstall windows, windows is right now not seeing any special instructions that your new cpu needs to operate at its' full potential. I think Bradys told me this, can't remember, but I think it was him. Anyway your BIOS reads the new cpu's presence, so when you bring up system info it's tells you the new CPU is there, but unless you reinstalled windows, windows methinks still thinks your old cpu is there. Try reinstalling your OS if it's windows. I think then you will see the change you expected. I reinstalled win98SE and my Mad Onion Bench 2000 score increased dramatically, and my FPS went from 26 on the runway, to 60. Hope this helps.
Hajo