hi i am looking to upgrade my pc, to asus p8z77 v pro with intel i7 ivy bridge 3770k, with my existing graphic card bfg nvidea 8800gtx,enermax 850w power supply, cooolermaster stacker 831se, i am stuck in deciding on memory as which one to go for? i know the board allows upto 2600mhz, i am looking at 2133mhz any recommendation many thanks