I use 1.40mch for my 24/7 at 500*9/1250 and when I had the stock heatsink on it would get pretty hot when priming even with a fan on it. I also noticed that since the first ram stick is so damn close to the nb heatsink it would get alot warmer than the second stick. I ended up getting an EK 5 waterblock for the NB which took out alot of heat and keeps it away from the ram which stay at even temps now. If I were you I would atleast pull the blue cover plate off the nb and put a fan on the heatsink and ram.