I gave my friend a 4 GB DDR4 2666 Ballistix ram stick when i went over, he has a prebuilt asus with a i5, 8gb single dimm and 970. So we upgraded his ram from 8 to 12, and single dimm runs at 2133. Ever since we did that his PC soft locked (wouldnt show a display) but was on and it had never done that before. Also now his computer makes a high pitched noise when playing games that have 3d models. Also we cleaned out all the dust in his PC cause there was ALOT. it used to make a burnt dust smell now after cleaning it makes it alot more potent. His computer runs fine when doing nothing, can the ram incompatibility be causing these new issues?