Should I back to 156.xx ?
If it works correctly for you, then yes.
No point in screwing up your system with the latest drivers if they do not work correctly with your setup.
Should I back to 156.xx ?
Do you get better results with 169.04
that depends on what you want to get working. EVR will accelerate whatever your card is capable of under Vista.
to fully decode h.264 (HDTV) in hardware, you will need a geforce 84xx-86xx, or the new 8800GT or an ATI card with UVD (24xx and 26xx).
This is interesting as I have a 7600GS passive which along with other feature includes:
• High-Definition H.264, MPEG-2 and WMV Hardware Acceleration
• Advanced Spatial Temporal De-Interlacing
• High-Quality Scaling
• Video Color Correction
• Integrated HDTV Encoder
Well, I would be interested to know how to enable the HD H.264 HW acceleration under XP, or if the EVR in MP would help or if I need to move to Vista.
for advanced deinterlacing and stuff like that, the list of usable cards is much longer.