http://www.ocworkbench.com/2008/jetway/PA78GT3/g1.htm
"Last year, in Jan 2007, AMD/ATi has a successful launch of their integrated DX9 graphics core, the RS690. The chipset performed well and had a good head start against it's competitor the NVIDIA MCP68 series. In fact, the RS690 or AMD 690G has created a miracle in 2007 as one of the most successful integrated chipsets for the AM2 platform.
In 2008, the same is about to repeat with the introduction of the AMD RS780 or AMD 780G in China on the 23rd of January (other regions will be in March). Although it will be introduced earlier, drivers won't be ready till February to support Hybrid CrossFire X."
"We tested two HD-DVD discs, the first is the The Bourne Supremacy and the second disc is the HQV HD Test Disc. Both titles are encoded in VC-1 format playback using XBOX HDDVD drive.
Results
With the disc Bourne Supremacy, we were able to get a pretty low CPU utilization of around 15%. This was never possible with older generation of IGP.
With the HQV HD disc, the CPU utilisation is even lower, we achieved an average of 9%. That is under 10%.
With this low CPU utilisation, the CPU can be offloaded to handle other tasks. That would also indicate that you do not really need a very powerful CPU to power up your HTPC."
"In 3Dmark06, The PA78GT3 based on RS780 also far surpasses that of the AMD 690G board M2A692-GDG. The increase is almost 3x. Percentage difference is 261%. That is an enormous leap in performance for IGP chipsets."
Chipset Brand Graphics Brand
RS780D AMD 790GX Chipset ATI Radeon™ HD 3300 graphics
RS780 AMD 780G Chipset ATI Radeon™ HD 3200 graphics
RS780C AMD 780V Chipset ATI Radeon™ 3100 graphics
RS740 AMD 740G Chipset ATI Radeon™ 2100 graphics