I have a XFX 6870 black 1 gig, and a Saphire 6670 , the XFX6870 works OOB no frame buffers, dual monitors and DVD, Geekbench works as it should, but the 6670....man i think i will sell that card... don't know yet.. with one monitor DVI [ pithecia ] works excellent , or with [ Ipomoea] HDMI...