Yeah they work great, just ask this guy, he is running Doom3 at the highest possible settings with no slow downs:
<A HREF="http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=52475&item=5114164403&rd=1&ssPageName=WDVW" target="_new">http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=52475&item=5114164403&rd=1&ssPageName=WDVW</A>
Or Read this thread to make more sense of it:
<A HREF="http://forumz.tomshardware.com/hardware/modules.php?name=Forums&file=viewtopic&p=185958#185958" target="_new">http://forumz.tomshardware.com/hardware/modules.php?name=Forums&file=viewtopic&p=185958#185958</A>
LOL, sorry I don't have an ATI card, so I don't know, but your post made me think of that. Think of it as a free /bump
My Desktop: <A HREF="http://Mr5oh.tripod.com/pc.html" target="_new">http://Mr5oh.tripod.com/pc.html</A>
Overclocking Results: <A HREF="http://Mr5oh.tripod.com/pc2.html" target="_new">http://Mr5oh.tripod.com/pc2.html</A>