Hi - I have a Canon Lide 80 scanner which supports USB 2.0 and thought I'd upgrade my dual 1gHz powermac to USB 2.0 to take advantage of the speed. I tested it before and after and found that when scanning a color photo it took: 14 seconds to scan at 150 dpi. 40 seconds to scan at 300 dpi. 147 seconds to scan at 600 dpi. Then I installed the USB 2.0 card and tried again, only to get the exact same times to the second. It is quickly becoming apparent that the limiting factor wasn't the USB speed, but the scanner speed. Or am I missing something?