Well I have dual crossfire capability, so I wouldnt get the advantage of sli if i ran dual nv cards, my board supports ati better.
And I had a hell of a job wiring up my hd audio from case to board with my current card because of its size, and the hd audio front panel still doesnt work nor does the usb ports on front either.....
As for the AA/AF
Lets take NWN2 With this system I should be able to run it at full, but I get stutters and I get wierd white edges on all textures with this card, be it cave entrances, walls, player body outlines, the card just cannot display it properly, of course it could be an old game on one of the newest drivers but I also had this on my old 8500 GT I assumed it was the card and expected the 260 to cope with it but alas it still doesnt, as above it could just be an old game engine.
my specs:
AMD Athlon II x4 630 2.8 gb
ASUS M4A77TD PRO
4gb DDR3 ram (unsure of brand)
500gb HDD
260 GTX
PB Full HD viseo 1080 Monitor