So I recently upgraded by CPU to an i7-6700, and afterwards my PC only boots with only one stick of RAM. I've tried each stick individually in each slot (both HyperX DDR4 4gb in an ASROCK b250m-HDV), so this isn't due to faulty sticks/ports, the only config that doesn't boot are when they are together. I obviously have no idea, and it could easily be something else, but I'm pretty sure it's something to do with voltage in BIOS, but I haven't a clue how to change it or what is safe, they are quite intimidating for someone not fully into computers.