first of all sorry for my english
my system is this : is 3570k , msi z77a-g43 , gigabyte gtx 760 , 3*4 gb ddr3 ram
my board have 2 pcie slot ( first is 3.0 x16 and 2.0 x16 ) , my vga was fine on first slot for many years with out any probem then some day i start the pc and monitor shows...