Originally Posted by sl1pkn07
your gpu clock is overcloked? (9800gt by default is 600MHz)
It's the stock speed per EVGA. It's OC'd by the manufacturer.
Well, I've given up on it.
I've verified that Powermizer is running the GPU at 650MHz, the CPU is set to a minimum of 2.0GHz and I still get poor results. In fact, using Coolbits and overclocking the GPU produces no significant difference in the results.
So I think there's a bottleneck here somewhere preventing VDPAU from reaching it's full potential. On an aside, the 7300 I have in it now performs just as well as the 9800 for XvMC, and even the onboard Intel graphics performs remarkably well. So I'm back to the 7xxx series Geforce and the 9800 goes back to the retailer.