I installed 8 gigs of wintec ddr3 1333mhz to my m5a99x evo mobo. It will post and take go to black screen says success memory is running correctly pls go to set up. When i get the the set it post that i only have 2 gigs running when it should be 8 gigs. Same goes when I do 4 gigs i will still 2 gigs running at max. Same thing posted in system specs in os. Can someone help me clarify what the problem is thankyou. running on 64bit windows 7