I have a MSI x99s sli plus board. It has quantity of pci E 16 X 16 X 8 slots. For fun I am looking for a board that has the room to fit (3) MSI Radeon R9 290X water block cards. I would like to run them all in pci e 16 X 16 X 16. Does anyone know of a board. I have a cpu i7 5930K cpu. But it only has 40 lanes. I believe the 16 x 16 x 8 would run the same as the 16 x 16 x 16 with this cpu though. What do you guys think. If I did find a chip that supported enough lanes, would that improve the performance? This is just for gaming and the fun of learning.