Re: 6800GS vs. 9800 PRO: How big an upgrade?
Yes default clocks for 6800gs agp is 350/1000 vs 425/1000 for PCIe.
IIRC 6800gs agp scores around 4500p in 3dmark05 while the pcie version scores around 5000. So the 6800gs agp is roughly 10% slower than the 6800gs pci-e.
[Asus M3A78][Athlon X2 7750 BE][HD3870 512MB][2GB DDR2 800][X-Fi Xtreme Gamer]