So I was thinking about getting a 980 and was looking at getting either the MSI twin frozr or EVGA ACX 2.0. The EVGA card comes with a better stock clock but I plan on overclocking. I'd figure the MSI card because it's got dual 8 pin connectors while the EVGA card has better stock clocks (so I'd think it could do better) but dual 6 pins. Does this make a difference in the overclocking capabilites?