No, you will not have a bottlenek.
the Radeon 9800 pro ain't that high end of a card. It's a good card, but a 2.4 won't bottleneck it.
Or, the bottleneck will be so minscule u won't notice it. I mean, of course it'll help if you OC ur processor to speeds of 2.8, but it's not that big of a problem.
a 2.4 and a 6800 is a bottlenek
Athlon 64 3800+ @ 2.8 ghz.
Leadtek 6800 350/700 PCI express, different from before.
80 gig Samsung HD SATA x 2
1024 Kingston Hyperx Ram