[EciDemon]

There are different kinds of connectors as you have seen, 6 pin, 6+2 pin and 8 pin.

6 pin should sustain 75w max while the 8 pin sustains 150w. a 6+2 is still 75w and they are not to be considered as true a true pci-e 8 pin.

That psu should be enough for two g260's core 216 but I'm not sure about the g280. I don't think it's enough performance difference to justify the cost difference, but thats just me.