I have 8GB (2x4GB) of corsair vengeance RAM which is MEANT to be 1600MHz. My mobo automatically down clocked it to 1333MHz so i changed it to 1600MHz (without changing any timings or anything). Since i got BF4 it's been having many crashes, including occasional BSODs. I blame EA for most the crashes but i even got a BSOD while opening photoshop the other day so i decided that was my PC. Not knowing what else it could be i put the ram back to the auto clock in bios. Now BF4 keeps crashing and saying 'the application has been denied access to your video hardware'. As this only started happening once i put the RAM back to 1333MHz I'm guessing it's that which is causing it. My question is, could me upping the ram in the first place caused some of the errors and how can i get it to 1600MHz safely if it was me 'over clocking' it which originally caused the crashes?