If you take off your cooler and see that the thermal paste is not evenly spread on the cpu, then the heatsink isn't making good contact. One thing I had trouble with when installing my h100i was the backplate. I installed it incorrectly the first time and everything went to h3ll. I'd suggest completely disassembling everything and putting it all back together, making sure to tighten all the screws w/ a screwdriver. That helped me.