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Your original temps do seem a bit high for that cooler. I had a 950 @ 4.00Ghz with a CoolIT ALC 240 (which is very similair to the H100) and they weren't anywhere near that high. I agree with everyone who has said that it is better to OC in the bios. Lower volts = cooler temps. It can be a scary place at first but if you take the time to learn and listen to the advice given out in these forums it will quickly become less daunting