What would you consider maximum acceptable temps for your OC?

[Timmah!]

So i finally have my X299 system put together. I OCed the CPU to 4,4GHz (its the 14-core flavour). I passed the 15 minutes of RealBench with 32GB setting and overall, system has been stable for all the other usual usage, including consecutive runs of Cinebench.... so i am willing to consider it stable until proven otherwise.

The thing is, the temps during Realbench stress test did rise occasionaly on some cores up to 98C, and 10 of the 14C crossed 90C. I am cooling it with 360 AiO (alphacool eisbaer) and the CPU is not delidded. The question now is, is this OK? Is it fine to stick to these settings, cause in general usage (including gaming and CAD work, which are probably the most demanding things i do on this computer) i wont get up to such temps, actually not even Cinebench does go over 90C...? Or should i rather dial my OC back to maybe 4,3 or even less if needed, to keep my temps ideally under 90C at all the times?

 

[Markfw]

I would never go over 80c, its really shortens the life of the chip at 90.

 

[eotsa]

It should be 70-75C, if be more, CPU is risky and lowlife. I'm not recommend for you.

 

[Campy]

If it was my system I would send it to SL for delidding rather than take the risk.

 

[Hail The Brain Slug]

Pre-custom loop (AiO) I was happy with an 8 hour realbench maxing temps at 85c or below (average obviously being around 70-75C over that duration.

Now with a custom loop, I would be uncomfortable maxing out above 75C for a 24/7 overclock in the same scenario.

Those temperatures you've stated are absolutely not okay for a 24/7 setting. I'd be looking at delidding in your situation, if the voltages are good for those clockspeeds.

 

[Timmah!]

Thanks for your responses.

SL delid is not an option to me, as i am in Europe, although i know there are people here in my country, who do the service - sadly not somewhere close, rather across the country, AFAIK. So i guess this is not a way i can go, too much hassle for something i not need.

As i said, while its 24/7 setting, the maximum temps are the ones during RealBench, its not like i have them all the time under load - i played Forza Horizon 3 and they were in the 50-60C range top. Then i ran Cinebench few times and max temp on one of the cores was 84, the majority of the remaining cores were under 80....

But i understand your concern. I already tried to bump the clockspeed to 43x across the cores and decrease the VRIN to 1,85V (from 1,9V previously set for 4,4GHz). It passed the Realbench 15min no issue, the reported VIDs for the cores were lower (now between 1,15 - 1,18, with 4,4 between 1,17 - 1,22), the max temps though, were not much lower - still above 90C.

So i am going to try to lower it further to 41x and maybe the VRIN to default 1,8V to see if its stable - we shall see whether there will be major improvement or not. However, i am thinking about letting the 2 coolest cores i had (no.5 and no.10, were 83C and 84C max when most were around 90 and 2 or 3 were 94-96C) to have higher multi (like 44x, maybe even 45x) and then force their usage for lower threaded apps... i can do that, right? Via some process lasso or whatever its called?

 

[wilds]

Those temps are quite warm, especially for Cinebench!

 

[Timmah!]

I dialed back the OC to 41x. The max temp now on the hottest core was 79C during RL stress test. So i guess this is it, if i want to follow your advice. I would still like to keep at least 2 cores at higher clocks as said in above post - if i set the affinity with process lasso to these cores for say Cinebench, would it still use all the other cores in Multi Core test? Or just these 2 cores?

 

[Markfw]

I dialed back the OC to 41x. The max temp now on the hottest core was 79C during RL stress test. So i guess this is it, if i want to follow your advice. I would still like to keep at least 2 cores at higher clocks as said in above post - if i set the affinity with process lasso to these cores for say Cinebench, would it still use all the other cores in Multi Core test? Or just these 2 cores?

Unless you think you have a performance problem, I would leave it at this,quite acceptable temps. What vcore did you have to give it ?

 

[Timmah!]

I set the vcore to Normal with Offset 0,1V. At 41x this sets the VID for all the cores in the 1,07 - 1,11V range.

Now, as said, i put 2 coolest cores to 44x multi. Finally managed to get the Intel Turbo Boost 3.0 going too, by setting it to Legacy Mode in BIOS, without that, it would not install nor seemingly work. Now its installed under Windows finally and shows the Core 5 and 10 (the coolest ones) on top of the chain and these are actually ones to be the coolest from my observation. Now i can see frequency of these cores during CB single core run to bump up to 4400 MHz (most of the times it does bounce between 4100x and 4400x) and i got to the score 191 - which i think is in line with expectations for 4,4 GHz frequency.

I am going to test RealBench once more, to see whether those 2 cores at 44x wont have any influence on stability (should run at 41x anyway, but their VID is now up 1,18) and if it proves stable and not too hot, i will leave it at this as you suggest. Well, maybe i will look into Mesh now and try to bump that one slighty to see what gives, but otherwise i am quite satisfied.