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Hyper 212+ Pull Only? - Page 2

post #11 of 20
Fans dont really remove that much heat to begin with. Its easy to hear your fan raging at 2500rpm and 38dBA in your case, and think "man its working so hard and removing all that heat".

EXAMPLE (and I encourage you to try something similar):

I ran a Prime small FFT test earlier with my case fans & heatsink fans on 100%....... I was getting ~70-72C at the end of the 10 minute test. Now, obviously, in a short test the case fan speeds are less important, but I just did that because at the time I was comparing results to something else.

I've now been running the exact same test with the fans on minimum (incl heatsink that is). I'm using push/pull. My temps now.......... ~74-76C at the end of the 10 minutes.

========

When/if you compare one fan configuration to the other its really easy to look at your temps and say "well that looks pretty similar" and conclude that there's no difference. There's still a difference, it just may not be noticeable or significant to you. As I explained before pushing will be better, but maybe only by 1-2C as chinesethunda suggested. This isn't because they are nearly equivalent - its because fans don't do that much to begin with.

Keep in mind also that as far as TIMs go, the difference between a poor one and a good one may be 3C. It sounds like very little when we have operating temps of 70C, but in reality its quite large. It's hard to get much more of an increase from something like a fan or a TIM which really arent MEANT to do that much. They have purposes but their purposes are not the primary methods of heat transfer. They FACILITATE heat transfer.
Edited by donkrx - 8/12/11 at 4:29pm
    
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post #12 of 20
one of nice things about the hyper 212 is that you can raise up the fans a little to clear the RAM. that's what i do and it works just as well.
    
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post #13 of 20
Quote:
Originally Posted by iCrap View Post
one of nice things about the hyper 212 is that you can raise up the fans a little to clear the RAM. that's what i do and it works just as well.
so much truth in these words
   
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post #14 of 20
i just purchased a hyper 212 for my work computer in a HAFX and it is coming in at 78deg under full load at 4.4 ghz...i'm much more impressed with the cooler master h50 water cooling system. It puts my 2600k at home at 65 deg under full load at 4.4 ghz
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post #15 of 20
I would greatly appreciate a controlled test on this subject. My own work with the D14 says that there is no difference between various fan setups on that heatsink (see item 4 in my sig, chapter 3). But that is an inline twin finstack cooler.

I wish I had tested a pull-only config when I had my Megahalems in testing, but I only did some preliminary work that was not very accurate. And the D14 is not moving until I'm done testing, which is months away, so I can't do a push vs pull test using my Armageddon.

So, can someone please test push vs pull (single fan) a 212+, Armageddon, Megahalems, VX - even an Archon? They're all similar enough that the results should be generalizable to all of them
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post #16 of 20
Quote:
Originally Posted by ehume View Post
I would greatly appreciate a controlled test on this subject.
I'll see if I can do it in the next couple days. EDIT: the problem is though, no CPU is the same and they can have very wrong thermal sensors. There is slope error and absolute error... the slope error is greater under lower temps, but still it persists at higher temps so you cant really compare tests.

Additionally, we're talking about very small differences here. It might be 2C like we said, and that's well within sensor error.

Slope error is not consistent... at 40 degrees it might be off by 6C, at 60 degrees it might be off by 4C, 80 degrees 1.5C....

Quote:
Originally Posted by saintpcr View Post
i just purchased a hyper 212 for my work computer in a HAFX and it is coming in at 78deg under full load at 4.4 ghz...i'm much more impressed with the cooler master h50 water cooling system. It puts my 2600k at home at 65 deg under full load at 4.4 ghz
What is your load voltage in cpu z? those temps are way too high, something is wrong with the TIM application. When I was experimenting with application methods, even ones I thought might work pretty well, I got 8C differences under load (70-72 vs 78-80).

What I did to minimize my temps (I've tried various TIM application ideas) is first tint the surface of both the heatsink and the CPU, also I fill in the gaps between the heatpipes of course. The tinting process is detailed on Arctic Silver's instructions, you can do it with any paste and it cant hurt.

Next I apply paste on the heatsink like in the pic. The thickness of the lines in the pic is a little thicker than what I actually use, but not by much. You can always do a test mount to see how much you need. The 2 black dots in the middle are just tiny dots of paste just because I wanted to ensure that the middle portion of the CPU was covered. It's not necessary if you use the right amount.

Last step, twist the heatsink left and right a few degrees after its screwed in - you dont want to unintentionally put pressure more on one side and lift it slightly, that will cause air bubbles, so do it after its mounted. It helps spread the paste and cover more area (youtube "how thermal compound spreads") - some thicker pastes need a little assistance in spreading out well because the pressure the heatsink applies to the CPU just isnt enough to get that optimal ultra thin layer we really want.

It's important to use a VERY thin line (literally its 1 millimeter) so that even though the TIM on the outer pipes is very close to the edge of the CPU, its not spilling over. It's better to use several lines to ensure contact on each heatpipe than 1 big line, at least in my experience.

Edited by donkrx - 8/13/11 at 3:58pm
    
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post #17 of 20
If you don't mind waiting another week or so I will try it gladly. I left my infrared thermal thingy in a box at my friends apartment so when i go back up to school I will test it. I have 4 blademasters that I can test with. If there are other coolers that are cheap I am willing to test them if you can link me cuz i know the archon is like 60 bucks? i think but i would love to have that cooler
   
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post #18 of 20
Quote:
Originally Posted by ehume View Post
I would greatly appreciate a controlled test on this subject. My own work with the D14 says that there is no difference between various fan setups on that heatsink (see item 4 in my sig, chapter 3). But that is an inline twin finstack cooler.

I wish I had tested a pull-only config when I had my Megahalems in testing, but I only did some preliminary work that was not very accurate. And the D14 is not moving until I'm done testing, which is months away, so I can't do a push vs pull test using my Armageddon.

So, can someone please test push vs pull (single fan) a 212+, Armageddon, Megahalems, VX - even an Archon? They're all similar enough that the results should be generalizable to all of them
Doesn't your work here: http://www.overclock.net/air-cooling...-position.html (SEE 2A) clearly show/confirm what I was saying; i.e. that push is better than pull?
    
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post #19 of 20
Quote:
Originally Posted by donkrx View Post
Doesn't your work here: http://www.overclock.net/air-cooling...-position.html (SEE 2A) clearly show/confirm what I was saying; i.e. that push is better than pull?
That is on a D14, where the pull fan is on only one of the towers. Very different from pulling on a single tower.
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post #20 of 20
wouldn't it also be varying with cases as well? or maybe not so much? i guess moreso with orientation such as horizontal or vertical. but vertical wise im pretty sure push/pull>push>pull but i will conduct a study as i have the 212+ and post results within a week or 2. My fans are not with me and i want to see the difference between some lower budget fans see how they perform
   
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