Thanks for all the great comments! I upgraded the cooler from the Wraith Prism to the Scythe Mugen 5 as gaming cpu temps were hitting 79 after an hour playing COD MW. It was in a crappy cheap case at the time, but even taking off the whole case side panel made no difference to temps. It now sits in a Lian Li 011 Dynamic case (not air cooled designed I know), but it has 9 120mm fans, which I have tried in various configurations. It has still hit 76 top with a 23 ambient. It generally runs several degrees lower than this as it was an unusually hot day here in the UK when it hit 76. I am confident that the thermal paste is good. It just seems to me that it should be running cooler. Is this due to the damage on the IHS?