Doesn’t the shuttle use different drivers? I’ve been running this card fine with Vista 32bit for almost a year after sending my first one back due to audio issues. Every result I looked at about Intensity drivers blue screening with process_has_locked_pages and driver_power_state_failure were all from Windows 7 64 users, although it could be coincidental of course.
Unfortunately my card is a few months out of warranty so I’d be more inclined to look for alternatives rather than take a chance on a third one.