I installed a new PNY GTX960 (4 gig) in my X51r3 (latest Model). Everything went fine and was running great. Then I added 2 more monitors (same model) to give a total of 3 and enable surround and got it going good. Now it won't boot Windows half the time. When I took it back down to one monitor it boots up again no problem. I tried everything I can think of. Any ideas?