Any cards i do get would be reference cards since i want to put them on water especially the 290x with its 10000000000c throttle situation. so u would suggest the 3x 290 over the 3x 780 6gb? Funny how they made the 780 6gb now that the original titan are no longer a selling point >.> wish they would of made the 780 ti 6gb or 4 at the min