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Overclocking my new 6950x! 4.3Ghz GHz 1.277v Temperature Question? - Page 3

post #21 of 28
This is a great thread to be involved with. My 6950X will be here this thursday and I'm aiming to get 4.0 - 4.4Ghz out of it. We shall see!

I've got a CM 280L and the CryoRig Ultimate. Gonna try them both out and see what's possible. Using MX-4 Compound on it. I don't want to lap a almost $2K CPU. I will however be buying that $50 overclocker plan. Should pay for itself if I intend to keep this thing going the next 3-4 years or so...

Thanks guys!
post #22 of 28
Quote:
Originally Posted by alucardis666 View Post

This is a great thread to be involved with. My 6950X will be here this thursday and I'm aiming to get 4.0 - 4.4Ghz out of it. We shall see!

I've got a CM 280L and the CryoRig Ultimate. Gonna try them both out and see what's possible. Using MX-4 Compound on it. I don't want to lap a almost $2K CPU. I will however be buying that $50 overclocker plan. Should pay for itself if I intend to keep this thing going the next 3-4 years or so...

Thanks guys!

Unfortunately because of tolerances and how cheaply CLCs are made, to get the best temperatures you probably will have to lap it no matter what. And the IHS doesnt cost 2000$ lol, at most its probably a 10$ piece of thick copper.

THe best way would be to order a sample of pressure paper and try it out that way. ive seen the difference between lapped and not lapped and oyu can probably get a much bigger difference lapping an ihs then using clu or even going bare die.

People need to understand that the better both surfaces match each other the less TIM/LM youll need and the BETTER temps will be. If a tim is rated at 8w/mk and copper is rated at 100w/mk (idk the actually rating for copper just giving you an example) then obviously copper to copper will give you the best temps no matter what. Ideally you dont want any TIM if it was possible. All it does is give you another layer of resistance. This is why you let the mounting pressure spread the TIM it will go where it needs to and fill in the gap between ihs and heatsink.
    
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post #23 of 28
Quote:
Originally Posted by bluej511 View Post

Unfortunately because of tolerances and how cheaply CLCs are made, to get the best temperatures you probably will have to lap it no matter what. And the IHS doesnt cost 2000$ lol, at most its probably a 10$ piece of thick copper.

THe best way would be to order a sample of pressure paper and try it out that way. ive seen the difference between lapped and not lapped and oyu can probably get a much bigger difference lapping an ihs then using clu or even going bare die.

People need to understand that the better both surfaces match each other the less TIM/LM youll need and the BETTER temps will be. If a tim is rated at 8w/mk and copper is rated at 100w/mk (idk the actually rating for copper just giving you an example) then obviously copper to copper will give you the best temps no matter what. Ideally you dont want any TIM if it was possible. All it does is give you another layer of resistance. This is why you let the mounting pressure spread the TIM it will go where it needs to and fill in the gap between ihs and heatsink.

Oh no, I totally agree and understand. I get where you're coming from,,, There's just no way I'm gonna destroy the IHS when I paid what I did for this chip. Not to mention it can potentially hurt resale values.
post #24 of 28
Thread Starter 
Thanks for all the replies!

Over the weekend I picked up an EK Predator 240 and hooked it up and WOW, all I can say to anyone who's getting a 6950x is you either have to have the worlds best airflow or you have to watercool that sucker!

I've found 4.2Ghz to be my chip's sweet spot, and have found that to get another 300mhz out of it, it's just not worth the voltage increase.

I've managed to sit stable at 4.2Ghz @ 1.192V with GREAT temps. Have a look thumb.gif

The screenshot only shows a 20minute test, wanted to give you an idea of temperature, but it did pass 12hours yesterday.

I also made sure to test the GPU's at the same time because I found that even if I can get the CPU stable at a certain Voltage, once I test the entire system, it can't handle it. So this data is entire system stressed and running fine with great temps.

Ambient temperature around 21C.


Edited by m0oks - 6/20/16 at 8:21am
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post #25 of 28
Quote:
Originally Posted by m0oks View Post

Thanks for all the replies!

Over the weekend I picked up an EK Predator 240 and hooked it up and WOW, all I can say to anyone who's getting a 6950x is you either have to have the worlds best airflow or you have to watercool that sucker!

I've found 4.2Ghz to be my chip's sweet spot, and have found that to get another 300mhz out of it, it's just not worth the voltage increase.

I've managed to sit stable at 4.2Ghz @ 1.192V with GREAT temps. Have a look thumb.gif

The screenshot only shows a 20minute test, wanted to give you an idea of temperature, but it did pass 12hours yesterday.

I also made sure to test the GPU's at the same time because I found that even if I can get the CPU stable at a certain Voltage, once I test the entire system, it can't handle it. So this data is entire system stressed and running fine with great temps.

Ambient temperature around 21C.


In this test, was the GPU part of this 240 loop, or was it air cooled?
post #26 of 28
I'm running my 6950x at 4.2ghz @ about 1.2 volts as well. It's reaching 65-72C under load. You've probably noticed that decreasing the voltage by even the smallest of fractions tends to reduce the temps a lot. In my case a negative 0.03V offset set the temps back by 5-8C. I'm using a Noctua 14D with an additional 14mm fan.
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post #27 of 28
Thread Starter 
Both GPU's were air cooled. CPU was in the loop by itself.
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post #28 of 28
Hey all, I have a 6950x and cores 2 and 3 are running 4-5c hotter than the others.

Rest of the cores are around 35c and these are 39c

I have EIST off so cores are running at their max turbo boost of 4.0ghz

I'm trying to figure out if I can get those temps down if I reseat or if this is normal.

These are my idle temps by the way. Are those two cores perhaps running the OS background processes hence the extra heat or is my thermal pasting job bad?
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