As the title states, I have a dual processor 2009 Mac Pro (flashed to a 5,1). Currently running the stock E5520 CPUs (4-core 2.26ghz). I have a single X5677 that I have successfully de-lidded, and a second one on the way (maybe a week or 2 out). Can I run the dual CPU tray with just 1 CPU installed while I wait for the second one to arrive? If so, which socket do I have to place it in? I have Macs Fan Control if some of the fans start acting crazy due to a CPU missing.