Re: 8200 (IGP) based motherboards not suitable for VDPAU?
Do you have powernowd installed? I believe that is responsible for CPU scaling, and caused the same issues on my 8200 based setup. I would need to double check, but I believe the CPU scaling works by lowering the bus speed, not by changing the clock multiplier, which leads to less bandwidth for the GPU.
Try removing powernowd and see if it helps.