I tried putting in 2X 8GB corsair DDR4 sticks of ram to add to my 4X 4GB sticks already installed on an ASROCK X99 extreme4 MOBO, but the screen does not display anything. I have tried upgrading the bios (ver. 2.0), resetting CMOS by removing the battery on the motherboard for 1+ minutes, and changing the different slots of the new sticks of ram, but with no success. Someone please help. Thanks.