System crashes at Random during gameplay and most times doesn't boot up with both sticks in. (Most of the time I have just the 1 8gb stick in so I can not crash, but whenever I put the 4gb stick inside it crashes eventually. They're both DDR4, at least 2100mhz, and from Patriot. Motherboard is a B250M Pro-VD (MSI) and can take up to 32gbs of RAM w/ddr4 slots. other specs: Gtx 970, i3 7320, HDD. Anyone know why i crash??