So here is a pretty decent puzzler. I have (both Gigabyte) gtx760 and gtx970. Both OC 4GB edition cards. Biggest differences being the actual clock speeds on the core and memory...would SLI theoretically work? They are both 4gb cards and the 970 would get underclocked to match the 970 in terms of clock speeds, but would there really be any improvement to have them SLI instead of having just the one 970.