CPU Utilization during HD Video Playback: Blu-ray Playback
Nvidia’s DirectX 10.1-compatible GPUs can offload the CPU when decoding VC-1 much better than their DirectX 10 predecessors. Nvidia seems to have focused on video processing when developing these new GPUs. The fourth-generation PureVideo engine is indeed much better than the earlier generations.
The average CPU load is acceptable with both the GeForce 210 and GeForce GT 220 but the peak CPU load can be 30% or higher with the junior model. That’s not a good result for a graphics card designed for quiet, low-performance and inexpensive computers.
As opposed to VC-1, the new cards are not much better than their predecessors at decoding MPEG4 AVC/H.264. The GeForce 210 is even the worst performer with the Death Race fragment.
Nvidia’s GeForce series GPUs traditionally require less CPU resources to decode MPEG2 HD streams, and the new GeForce cards are even better than the previous-generation products as well as AMD’s Radeon HD 4500/4600 series.