Gee as I am messing around with lots more Canon Raws and CS5 I spent $230 and brought myself a Gigabyte GTX 560 1GIG twin port card for my old 2.4 Q6600 QUAD Win 7 PC.
Illustrator uses heaps of GPU now followed by Photoshop and Lightroom.
Lightroom flies and opens up the Canon raws instantly.
EDIUS 5.51 uses as much as 85% of the graphics GPU now.
When editing native 1920/1080 Canon MOV files I can have the second LCD screen as my full sized preview window.
I get real time timeline playback with 1 native Canon 1920/1080 25p mov, music track, static graphic and can adjust colour correction as the timeline plays in real time lol.
I can play two raw Canon Mov 1920 / 1080 video files full screen on both windows at the same time.
Using just single Sata drives, no raid.
Be interesting to see what I get when I update to i7 Sand Bridge.