TL;DR - Fitted an H100 today and the temps are no better than my old air cooler. Ideas?
I have an i7 3770k, running at 4.8 GHz at 1.28v, with a Coolermaster Hyper 212. Now the weathers warming up, it's starting to get hot (83° C under load) and I bought a Corsair H100 on eBay to see if that would help.
I fitted it this morning, but I noticed the waterblock's face was all scratched so I lapped it at the same time, and did the CPU as well. Didn't get a mirror finish (only got to 1000 grit) but it did help (H100 was convex, CPU was ok).
However, been running it on the max setting, and under load it's hitting 81° C - basically the same as before!
Any ideas?
My thoughts were:
Poor TIM application - the AS5 I used was old, maybe I need to buy some new thermal paste and try again (recommendations on the best stuff to use?)
Poor lapping - I've bought some 2500 grit to take it a bit further (I've never lapped anything before to feel free to redicule!)
Poor mounting - I screwed the H100 down all the way but it appeared to run out of the thread on the screws before it went too tight
Some pictures.
CPU:
Waterblock (it did get a little better than this)
Fitment:
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