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

post #1 of 28
Thread Starter 
Hi,

Don't post here much but I need some help.

This is what I'm running:

6950x
64gb Corsair @ 3200mhz
Asus X99 Deluxe 2
AX1200i Corsair PSU

Due to the location of my PC in my home office I initially went with the biggest Noctua air cooler I could get, and bought the Noctua NH-D15S. Heres the problem:

At IDLE, all the temps are relatively the same, around 30-40C depending on ambient (whether I have the AC on or not).

Once I start to load, I get a wild variance between Core 1-5 and Core 6-10, now looking at the architecture I couldn't find reference but I'm going to assume by this image that 1-5 are on one side and 6-10 on the other.

Would I be right in assuming that maybe the CPU cooler needs to be reseated? Or is this common due to the architecture of the CPU itself?

I just want to figure out the temperature problem because I can get it 24 hours stable at 4.3GHZ with only 2.77Vcore....I think that's pretty damn good. Only problem is on Core 1-5 I get high temps as seen on the screenshot.

In the temperature screenshot you can see I tried lowering the Multi to get 4.1Ghz but had the same temps as at 4.3Ghz

EDIT: is it normal for the core's temperatures to fluctuate wildly during 100% load? Like i'm saying they jump from 70-80-70-85-70-75 etc in milliseconds, is that just the way the CPU regulates cores? Doesn't make sense because shouldn't they all just be at 100% the whole time? And no, it's not thermal throttling.

EDIT 2: Would it be worth looking into maybe a water cooled CPU just the Corsair 80 or whatever something like that?

Thanks






Edited by m0oks - 6/12/16 at 7:16am
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post #2 of 28
Quote:
Originally Posted by m0oks View Post

Hi,

Don't post here much but I need some help.

This is what I'm running:

6950x
64gb Corsair @ 3200mhz
Asus X99 Deluxe 2
AX1200i Corsair PSU

Due to the location of my PC in my home office I initially went with the biggest Noctua air cooler I could get, and bought the Noctua NH-D15S. Heres the problem:

At IDLE, all the temps are relatively the same, around 30-40C depending on ambient (whether I have the AC on or not).

Once I start to load, I get a wild variance between Core 1-5 and Core 6-10, now looking at the architecture I couldn't find reference but I'm going to assume by this image that 1-5 are on one side and 6-10 on the other.

Would I be right in assuming that maybe the CPU cooler needs to be reseated? Or is this common due to the architecture of the CPU itself?

I just want to figure out the temperature problem because I can get it 24 hours stable at 4.3GHZ with only 2.77Vcore....I think that's pretty damn good. Only problem is on Core 1-5 I get high temps as seen on the screenshot.

In the temperature screenshot you can see I tried lowering the Multi to get 4.1Ghz but had the same temps as at 4.3Ghz

EDIT: is it normal for the core's temperatures to fluctuate wildly during 100% load? Like i'm saying they jump from 70-80-70-85-70-75 etc in milliseconds, is that just the way the CPU regulates cores? Doesn't make sense because shouldn't they all just be at 100% the whole time? And no, it's not thermal throttling.

EDIT 2: Would it be worth looking into maybe a water cooled CPU just the Corsair 80 or whatever something like that?

Thanks






Definitely look into a good AIO water cooler. If not, I'd take 100MHz off the clock and dial back the voltage to 1.25V to get those temps back under control. Also, double check for good contact between your heatsink and CPU and minimize the quantity of thermal paste that you're using,
Edited by lutjens - 6/12/16 at 7:32am
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post #3 of 28
Thread Starter 
Quote:
Originally Posted by lutjens View Post

Definitely look into a good AIO water cooler. If not, I'd take 100MHz off the clock and dial back the voltage to 1.25V to get those temps back under control. Also, double check for good contact between your heatsink and CPU and minimize the quantity of thermal paste that you're using,

Ok thanks. I'm pretty happy with 80C though as a load temp, so if reseating my cooler will give me 80C across the board that will be pretty good...maybe I'll just do it and see what happens.
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post #4 of 28
Get high temps on cores 1-5 on my 6950X too.
post #5 of 28
Thread Starter 
Quote:
Originally Posted by coolbho3k View Post

Get high temps on cores 1-5 on my 6950X too.

Cool! I actually reseated the CPU cooler a total of FOUR (4) times today just to test it out and every single time I get the same thing, I asked my friend who's an electrical engineer and thought he might be able to shed some light on it (LOL @ that pun), anyway he reckons its the DESIGN of the chip itself.

If you look at the chip itself, I reckon CORES 1-5 are on the LEFT side, so they arent getting ideal thermal transfer, the cores right in the middle are, which I believe are 6-10.

Anyway its just the way it is. I've dialed down my OC and have better temps now (90C MAX and around 75-80C under 100% load).

Can you comment whether your cores also spike up to like 10C hotter than the average for a millisecond then back down?
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post #6 of 28
I think temperature variations like that are normal under normal usage as cores are loaded and unloaded, as even a little load can cause temperature to spike from idle very quickly and then back down. If you're running a constant benchmark the temps should stay high and not jump around though, but it depends on the benchmark.
post #7 of 28
1. An aio wont fix your issue youll probably get identical temps unless your buying at least a 360mm rad. That chip puts out a LOT of wattage.

2. I would start by lapping both the cpu ihs and the heatsink of the noctua. Get better pressure onto the IHS. IHS seem to vary widely where some you end up with very poor pressure.

We also need to know what case your using, what rpm your noctua fans are spinning at, and your ambient temp.
    
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post #8 of 28
Did you buy overclock tuning protection from Intel? I would if you want to run those temps. Check Intel's web page.

I think they are too high for that cooler. I custom water cool but with what you have, I would back off from 43x100 to 42 x 100 and back off your vcore slightly.

Have you run Intel's overclocking software?
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post #9 of 28
Thread Starter 
Quote:
Originally Posted by coolbho3k View Post

I think temperature variations like that are normal under normal usage as cores are loaded and unloaded, as even a little load can cause temperature to spike from idle very quickly and then back down. If you're running a constant benchmark the temps should stay high and not jump around though, but it depends on the benchmark.

Yeh under idle I can understand, but at LOAD, using AIDA64's stability test, I get Cores 1-5 with a MAX temp of around 90C but on average (like when I look at the actual temp right now, its only around 80), and if I sit and watch, the temps spike up to 90C for a millisecond then go back down to 80 on random cores (mostly just cores 1-5).
Quote:
Originally Posted by bluej511 View Post

1. An aio wont fix your issue youll probably get identical temps unless your buying at least a 360mm rad. That chip puts out a LOT of wattage.

2. I would start by lapping both the cpu ihs and the heatsink of the noctua. Get better pressure onto the IHS. IHS seem to vary widely where some you end up with very poor pressure.

We also need to know what case your using, what rpm your noctua fans are spinning at, and your ambient temp.

Yeah after some more research, you're right. It's a pretty big air cooler I have and I tried putting some beast fans on there, very similar temps. I'm not terribly fussed though because it does have 10 cores after all so I dropped the OC down to 3.6ghz at 1.24v and have much more manageable temps now and CPU still only around 35% usage when I'm performing all the tasks I need to and running a game while waiting. So plenty of headroom smile.gif

Quote:
Originally Posted by skline00 View Post

Did you buy overclock tuning protection from Intel? I would if you want to run those temps. Check Intel's web page.

I think they are too high for that cooler. I custom water cool but with what you have, I would back off from 43x100 to 42 x 100 and back off your vcore slightly.

Have you run Intel's overclocking software?

No I didn't. I'll definitely look into that...especially with the price of this chip. Do you have any experience with their protection? I've backed off to 36 x 101 with vcore of 1.24 and it's stable 3hrs so far with temps more manageable, around 80C average with those spikes I mentioned above only going to around 90C, sometimes 91C...

At the end of the day I don't need to OC it that much, as I mentioned above, currently at 3.6ghz Im only at around 35% load with ALL my tasks running and playing a game while waiting.

No I haven't run their overclocking software, should I? Whats the benefit? I've done it all from BIOS (I'm an old school LGA775 overclocking kinda guy lol)

Thanks for all the replies =)
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post #10 of 28
Thread Starter 
Just purchased the Overclocking Protection Plan. $50USD ($70AUD for me). Well worth it. If it wasn't that cheap I might have reconsidered.

Thanks for the advice mate, appreciate it. Didn't even know that existed.
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