Thank you, love my Hero! Might want to step the mobo up a bit, with 2x 280x your looking at putting them in a mobo w/ 1 PCI-E3 slot and a PCI-E 2 x4 slot if I remember right, with two cards would look at a minimum of prob an Asus Z87-A for the 2 PCI-E3 slots and can run at 8x8