260 gtx +260 gtx core 216 sli
I can verify that a 260gtx 192 core and a 260gtx core 216 work in sli I used them myself here is a post from evga forums on the subject due to the confusion about what is required for 2 cards to work in sli and what is considered the same gpu .http://www.evga.com/forums/tm.aspx?m=6577&high=sli+questions+answered
If someone stated that it's possible to SLI with a GTX 460 and a 460 SE, they're wrong. The cards have to have the same number of cores and same be the same basic part to work together in SLI. I'm sorry to have to inform you that it won't work on any board.