Well I want to get an Intel motherboard (LGA1155 preferably for i7 2600k and overclocking) with CrossfireX 6990s which are dual gpu cards which would be considered as 4 cards on a motherboard and I don't know a motherboard that supports quad crossfire. Also I saw that one 6990 at full load consumes 554w!!!! if i wanna get 2 and i want to overclock the cpu and gpus what psu will i need?