Easily enough power. Looking at the worst case a overclocked 2070 super Evo OC draws around 265w (card only) so 530w for a pair of those cards overclocked. That's not a route I would go down though. I agree with MissChief, multi card gaming has had it's day and a powerful single card is the way to go so my choice would be a 2080ti or to wait for the new cards from both AMD and Nvidia launch, possibly in September.