They do work, and you can find them on ebay for 20$.. Btw, I got 10Mhash less with the adapter but some MoBos can adjust the lag..
Thanks! What do you mean by adjusting the lag? BIOS settings?
-EP
Well, theres going to be some lag from the gfx if theres an extra 6" of cable there, so some mobos can adjust, some cant.