15.9 driver is coming out by end of this month/early next month and is a minimum required driver for their next generation GM45/G45 chipset with GMA X4500 IGP. 15.9 driver is also DX10 driver, but too bad G965 won't support DX10. GM965 and G35 users will get DX10 support though.
This beta version (I´m running it) does not seem to support DX10 (GM965) but it does support Shaders v3.0, at least when I set them on Pro Evolution Soccer 2008 (High Settings) it runs very well!
I tried the default setting of my GM965 15.8 (with no option to change energy savings) and the 15.9 with energy savings off and I would say that it was about 25% fast on PES 2008 and 15-20% fast from 15.9 with default energy savings vs. 15.9 energy savings off
These drivers + GM965 are getting better