I'm going to tag onto this thread because I'm having the same experience, sans the fan failure issues.
This is the first really hot processor I've ever used and so I decided on getting something bigger to handle the heat.
AMD Phenom II X4 975 BE on a Gigabyte GA-890FXA-UD5 in a mid tower case.
Finding a cooler that will fit and clear the memory on this board was a challenge.
This one seemed great. All the dimensions worked out well and being able to snap the fan off to install memory is nice. Unfortunately my case does NOT have a cut-out on the back side when the CPU backing plate mounts so it's all the cables off and board out each time you want to futz with this cooler.Here's the problem though, it just doesn't cool and I do think the issue is that the heat is not making it's way into the cooler effectively.I'm on my 4th attempt now here's how it went down:1st
It wouldn't survive the Gigabyte ET6 self overclocking attempts without getting too hot. So I found prime 95 and speed fan plus a few others to help figure out what was going on. I went back to stock settings for the cpu. Running the bench mark or torture test with only two threads it climbed pretty quickly, 2 minutes, and exceeded the 62C limit given by AMD. So I thought hey too much thermal paste.
I called Coolermaster and said I thought I had spread it thinly but your instructions weren't exactly clear so what do you recommend?
They told me to put a 2mm ball of paste in the center and let the clamping force spread it out.2nd
I got even worse temps so off it came and what I observed was a circle of paste center and spread perfectly but about the size of a dime.
Now the way this thing mounts on an AMD board you tighten nuts on the four posts on the back side of the board until they run out of thread and dead end. That's supposed to cause enough spring loaded force to make proper contact and spread the paste.3rd
I decided to give it another shot at spreading the paste much thinner than the first time but it did cover the entire surface.
Well it was a lot better now than either the 1st or 2nd times but with stock settings the prime 95 bench mark test got it into the mid 55C and a two thread torture test would run for maybe 10 minutes before it hit 62C again. A full torture test was off the scale in 2 - 3 minutes.
So I thought maybe this is an airflow issue? I have the side of my case open and the back side of the cooler (fanless side) sits about 2 inches away from the rear exit fan (noctua NF-s12B) running at full speed. I have one of those in front of the hard drives as well and that one is being speed controlled by the board.
The CPU fan does get to full speed during the stress tests and then eventually quiets back down to the same speed as my front fan. The system temp barely changes which is why the front fan never gets very high.
So I took an extra fan and held it in various places during all of this to see if that would help. It made no difference so I have to conclude that the airflow is adequate but the heat is just not making it into the heat sink all that well.
I even closed the entire case up and tested again and that made hardly any difference.4th
So I called back and got someone who really didn't want to hear what I was telling him. He insisted that the Prime95 test is way too much for any system and then asked me what my temps were at idle and when I was surfing the web.
Then I told him that even with limited stressing, 50%, it was exceeding 62C and he said who told you that was limit ... Try AMD sir. So I asked him how he suggested I make certain that I'm applying the paste properly. He said a thin line across one side of the cpu and use a credit card @ 45 degrees to spread it thin enough so that you could barely read the writing on the CPU. I can barely read it with NO paste! But OK I tried this today.
It's much worse again. Now when I pulled the cooler off this morning before this latest attempt the paste was well distributed unlike the 2mm ball exercise.
I have a Noctua cooler on my HTPC. They recommend a 5mm ball of paste spread by the cooler technique but that's a very quiet rig with a lower power processor and I never stress tested that one. I don't think a Noctua cooler will fit this board and case?I think I'm done screwing around with this cooler. I've heard enough issues with it not cooling and while I understand that making very good contact for maximum heat transfer is critical I think I've really tried and that this cooler just doesn't allow that to happen very easily. In particular I believe, with AMD mount at least, it just does not spread the paste well so unless you get it perfectly applied it's not distributing what is applied very well and thus the heat never makes it to the heat sink.
I'm not sure whether Newegg will take it back so is there another model that Coolermaster makes that is fool proof compare to this one? The V6 & V8 models look too big and I guess I'm looking for a different mounting system?
Some other anecdotal evidence:
http://www.overclock.net/t/1351667/cooler-master-hyper-212-evo-vs-hyper-612-pwm#post_19102825Edited by staatsof - 2/7/13 at 5:33am