I have a Asus m4a785td-v evo motherboard and it currently has 4 gb of ram installed. The sticks in it are gskill ripjaws f3-12800cl9d-4gbbrl ddr3-1600 pcs-12800 2gbx2... The sticks I need to install are Gskill sniper f3-12800cl9d-8gbsr ddr3-1600 pc3-12800 4gbx2...Everything works fine with the ripjaws in, but when I put the other sticks in, the computer turns on but no visual is sent to monitor... I tried turning the mem voltage to 1.5 and so on but got nothing still. Does anyone know something else I can try in order to install these mem sticks?