Okay, I recently upgraded from a stock cooler which was giving me completely HORRID temps (up to 95c) while rendering some things with my trusty i7 4790k (running at stock speeds). I upgraded to a Cooler Master Hyper 212 EVO which was recommended to me by an immense number of people, and it seems to be a pretty solid cooler according to the internet, lol. Well, I booted up after installing (no problems, because I'm a pro B) ) and I ran prime95 to torture my cpu with my newly installed cooler and in about 10 mins I hit 77c, but it stayed there, went down, and then came back up. It did not go above that. Are those okay temps for a Cooler Master Hyper 212 EVO with Arctic Silver 5 thermal paste?
1. Artic Silver, according to their web site, takes 200 hours if thermal cycling to cure which makes it a not very good choice if you want to set up your system right away. As a system builder, I gotta get the boxes out the door in 48 hours so I don't have that kinda time. Keep in mind, they didn't say 200 hours under load, they said 200 hours of thermal cycling. To my reading, starting up the PC, running it for 8 hours and then turning it off is 10 minutes of cycling (5 warming up and 5 cooling down).
2. The Hyper 212 is a great budget cooler.....no one will argue that. But that's a long way away from saying it's a great cooler. The Phanteks PH-TC14-PE, Thwermalright Silver Arrow an Noctua DH-14/15 will generally get ya 7 - 10C more of a temp drop.
3. Prime 95 is not recommended for Haswell. Because of its ability to bombard the CPU with AVX, a wholly unrealistic scenario in actual practice, it presents an unrealistic loading and at the same time it doesn't stress parts of the instruction sets at all. x264 or RoG Real Bench and even AIDA 64 are better choices..
4. 77C is not unusual for that loading. I usually see like 62 with one of the 3 coolers above. It hit 85 on OCCT with the stock cooler.