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Ivy Bridge proven to suffer from poor thermal grease (VR-Zone)

post #1 of 10
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Intel has as yet to offer a full explanation as to why it changed the way its interfacing the IHS with the CPU die on its Ivy Bridge processors and previous reports weren't clear on how much of an effect Intel's move to using thermal grease had on the actual cooling performance. Thankfully Japanese website Impress PC Watch has come to the rescues and done some testing by itself and the publication has clearly proven that Intel's thermal interface material isn't up to scratch.


First of all, we wouldn't recommend anyone to tear off the integrated heat spreader on their CPU, as for one it voids your warranty and moreover you might actually damage your CPU. That said, Impress PC Watch tore off the IHS on a Core i7-3770K, wiped off the Intel thermal grease and then replaced it with OCZ's Freeze Extreme and Coollaboratory's Liquid Pro to see how much of a difference a change of thermal interface material would make.

Coollaboratory claims that its Liquid Pro TIM offers 82W/mk of thermal conductivity and hitting up some reviews it seems to be superior to OCZ's Freeze Extreme, something the Impress PC Watch test also showed. However, both materials were vastly superior to whatever gunk Intel sticks inside its CPU's, as at the standard 3.5GHz clock speed the temperature was reduced by 8 degrees C using the Freeze Extreme and 11 degrees C with the Liquid Pro

541

Move up to an average overclock of 4.6GHz and the difference is even bigger with 15 degrees for the Freezer Pro and a massive 20 degrees difference using the Liquid Pro. On top of all that, higher stable overclocking speeds without thermal throttling were reached at lower Voltages using either of the replacement TIMs, although once again the best results were achieved using the Liquid Pro which allowed a stable 5GHz overclock on air at 1.55V. We should mention that the rather large and expensive Thermalright Silver Arrow SB-E CPU cooler was used for these tests, so mileage might vary depending on cooler choice, but even so, the results speak for themselves.

If anything, this is an issue that Intel shouldn't be having, as it's not as if we're talking about low-cost Celeron or Pentium models here, but rather premium models with overclocking enabled. We can only hope that Intel will consider changing its thermal grease for something a little bit more advanced on the K-series CPUs, as the company can't expect users to replace it by themselves and thus voiding their warranties. It's also quite embarrassing that such a small cost is what's holding these new CPUs back, but as has been suggested elsewhere, this might be part of Intel's plan so it can flog some more Sandy Bridge-E CPUs.



Source: http://vr-zone.com/articles/ivy-bridge-proven-to-suffer-from-poor-thermal-grease/15844.html#ixzz1uaqTvNNA

Original Source: http://pc.watch.impress.co.jp/docs/column/sebuncha/20120511_532119.html
post #2 of 10
Even more happy I went for the 3820 thumb.gif
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post #3 of 10
http://metku.net/index.html?path=reviews/chill-factor-liquid-pro/index_eng3

mm!has you can see in this test the ambient temperature wasnt the same (higher)yet the stuff still cooled it by 8 to 9 degree!lower the temp by 4 degree for ambient and you get 12 to 13!so i bet if we knew the embiant temperature for those test we would be all saying :ah haaaa!

and 24 ambient temperature for all test?mm!maybe!
post #4 of 10
There was an article somewhere where they removed the IHS and tested with the cooler directly mounted to the die. It made little to no difference. The thermal paste doesn't matter, it's the fact 22nm is very tightly packed so it just runs hotter.

http://www.eteknix.com/news/ivy-bridge-heat-problems-remain-even-after-ihs-removal/

There was an article better than this, but same idea.
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post #5 of 10
hhmmm..im not sure what to believe...if intel comes out with a better version of Ivy bridge that stays cooler..i will cry a little in the inside...no lie. But if Dopamin is right...and it's actually due to the 22nm die size and not the TIM..ill be satisfied.
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post #6 of 10
I believe it. I returned my 3570k and got a 2700k since I already sold my 2500k
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post #7 of 10
For the plethora of TIM options there are out there, I would not be surprised to see better performance with a different TIM. This is a place where they should be using some of the best, because it is not easily replaced, the fact that they didn't is the only thing raising questions.
 
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post #8 of 10
at least intel should make it an optional feature!like do you want the 1000 w/m-k tim or you want the 10w/m-k tim!
post #9 of 10
This is really a big turn-off about Ivy Bridge. It would be fantastic for me to upgrade.. but damn, 10C just by changing TIM makes me hope Intel will make a proper revision.
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post #10 of 10
I can't wait to get one of those and de-lid it biggrin.gif
I just delidded an athlon x2 6000+medieval.gif

I think with Ivy..you have to stick good TIM on then put the IHS back
Hmm..wonder what would happen if i cut fins into the non-core area of the ihs? :thinking.gif
 
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