Core i7 Broadwell-E max safe temperatures ?

[Gripen90]

So I replaced my old Core i7 5820K Haswell-E with a Core i7 6900K Broadwell-E and it's immediately clear that this new CPU gets hot (22nm vs 14nm), therefore I'd like to ask what is the max safe temperature for Broadwell-E to run at ?
I tried looking at the data sheet for the CPU at Intel but it didn't say anything about the max temperature.

The reason I'm asking is because I'm running the i7 6900K at 4.0GHz 1.252volts (auto setting) and after 6 hours of OCCT 4.5.1 the hottest cores (2 of them) hits 83°c and the rest around 78°c - this is around 166watt power consumption on the CPU according to HWmonitor.

Is this "safe" enough as for temperatures ?
For normal use with gaming, videorendering etc the temperatures are down in the 50°c range.

I'm aware lower is better, but if the temperatures are acceptable during such a long stress test, I won't run out spending £60 on a cooler.

BTW I tried setting the voltage to "adaptive" but for some reason this doesn't work like on the Haswell CPU, if I set an adaptive setting it still uses 1.252v at load totally disregarding the values I put in.


I am using a Phanteks PH-TC12DX cooler at the moment (the one pictures on the right), but if needed better cooling I'd pick up a Phanteks PH-TC14PE (the left one pictured).

** Do Not Hotlink images **

 

[Gripen90]

Overclocking 6900K you need AIO or else don't overclock it. Use the Intel boost.

I have overclocked it !
Also I'm only using air coolers, since I lost faith in AIO when my former H80i V2 decided to eject the hoses on the CPU block, leaving a watery mess on my GTX 980.

 

[Gripen90]

Unfortunately no aircooler can assist you here.
And FYI you have to overclock the ring bus on the Broadwel-E if you want most out of the chip.

I have seen other overclock this chip with air cooling (the higher end air coolers), and achieving very similar results to those with 240mm AIOs, so I know it's possible - the question is just if it is needed or if the temperatures at stress are within safe limits.

A good air cooler is better that an aio.

Remember programs lime occt max out the cpu in a way normal use never will. Play some games and monitor temps.
You need a good air cooler not some little thing. 200w of cooling power plus.

My basket at Overclockers UK:

• 1 x be quiet! Dark Rock Pro 3 CPU Cooler= £74.99
• 1 x Noctua NH-D15 SE-AM4 CPU Cooler= £80.99
• 1 x Cryorig R1 Ultimate Dual Tower CPU Heatsink with 2x 140mm Fan - Black = £72.95
  • Coloured Trim:Unwanted
  • AM4 Bracket:Unwanted

Total: £239.43
(includes shipping: £10.50)



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Under normal gaming sessions and when doing video editing the temperatures stay around 50~55°c, so it's not that high - only when doing stress tests.
I did look at the Noctua NH D15S and it's a great cooler but the colour scheme just doens't appeal to my build, therefore I looked at the Phanteks PH-TC14PE for a colour match while providing enough cooling. The Cryorig R1 Ultimate does look interesting, so I'll have a look at that also.

 

[Gripen90]

I like the be quite, but the Cryorig gets good reviews

When your flat out stress test your system will see temps that at no other time will ever be seen. Also don't forget the max temp of your chip it higher than a desktop chip.
I good air cooler will do you just fine. But don't forget air flow in and out of your case is also important

I'm using a Corsair Vengeance C70 case with 2x2 120mm fans in the front in a "pull//pull" configuration, 1x 120mm sidepanel mounted intake fan, 1x 120mm bottom mounted intake fan, 1x 120mm rear exhaust and 2x120mm top mounted exhaust fans

Those gaming and editing temps look very good to me. If OCCT uses AVX 2 instructions that would explain why your temperatures are significantly higher, although still within safe limits, when running this stress test. Which OCCT test are you running by the way?

What were your temps like on your 5820k and what voltage were you using? I have an NH-D15S with a [email protected] at approximately 1.2V and my core temperatures vary between 50 and 65C depending on the game and ambient temperature.

If I run AVX heavy tests like Aida64 FPU or Prime95 AVX for a short time then temperatures will easily spike into the 75-80C range.

Can you run the default Aida64 stress test or Asus Realbench and see what temperatures you get then? These are what most seem to run and they're less intensive.

OCCT uses AVX instructions to my knowledge if the CPU supports it. I run the CPU: OCCT test with large data set.
I just tried AIDA 64 for about 1hour and the temperature sat at around 65~68°c

With my old Ci7 5820K i ran 4.1GHz at 1.15v with the same Phanteks PH-TC12DX cooler and temperatures hit around 75~77°c in OCCT.

 

[Gripen90]

Thanks you all. I'll keep my Phanteks PH-TC12DX for the time being - I maybe I'll cash out for the larger Phanteks PH-TC14PE around christmas time when the upgrade itch comes again