will a gtx 690 work with an asus crosshair 4 formula motherboard?. im about to replace the gtx 690 with 2 gtx 980's and i was

Solution
The board has PCIe 2.0 x16 slots, so the gtx 690 should work OK. Same with the two gtx 980's. Two 980's will really strain the CPU. Depending on which CPU you have, it might cause bottlenecking.