I am currently running BFG260 oc core216 (sli). I have them both clocked @ 655 for 2 weeks and NO complaints or noise. This is an upgrade from Evga8800gt oc (sli) and I do see and feel the difference.
750w thermaltake, EVGA780i, 4g OCZReaper, bfg260(sli) Antec 900