9700K vs 8700K (non delid) thermals

[Tigrou]

I searched hard but could not find any review comparing thermals of 8700K (non delid) vs 9700K (with same cooler of course).

 

9700K has STIM (so it should be a little cooler) but on the other hand it has slightly more agressive clocks and 8C/8T vs 6C/12T.

 

I would like to know which one is the coolest under stress, without OC (base clock with Turbo boost active) and without delidding.

 

 

[Fasauceome]

Any particular reason you're looking to compare temperature difference as opposed to whether or not a given cooler is sufficient for the job? 

[Tigrou]

6 minutes ago, fasauceome said:

Any particular reason you're looking to compare temperature difference as opposed to whether or not a given cooler is sufficient for the job? 

I have a 9700K (non OC).

It's a great CPU but it run a little too hot with air cooling for my taste (even with a huge heatsink). I was wondering if a 8700K (which has very similar performance or at least something negligible for me) would be 5-10C cooler.

[Mister Woof]

https://www.gamersnexus.net/hwreviews/3421-intel-i7-9700k-review-benchmark-vs-8700k-and-more

 

 

8086k ~= 8700k

 

Stock frequency 8086k (8700k) 32.7C over ambient in blender AVX 

Stock frequency 9700k 27.3C over ambient in blender AVX

 

Quote

Thermals on the Intel i7-9700K are on the screen now. For auto settings, keep in mind that we heavily rely upon the motherboard used as the temperature is most directly impacted by auto voltages. For the ASUS Maximus XI, those auto settings put the 9700K at 27 degrees Celsius over ambient when loaded to 100% with a Blender workload. Keep in mind that this is with MCE disabled, so it’s following the boost duration specification and sticking to a power consumption of 90W. Liquid temperature is at around 6 degrees over ambient during this test pass.

Going to about 5GHz and 1.35V, the 9700K measures an average all-core load of 54 degrees over ambient, with power consumption at 188W and liquid thermals at about 10 degrees over ambient. This places the 9700K as noticeably cooler than our 9900K sample when soldered, which measured at 64 degrees over ambient. This thermal delta isn’t for any other reason than the 9900K drawing significantly more power in this test. The two results are not directly comparable, other than to say that the 9700K’s lack of hyperthreading does make it easier to keep cool under heavier overclocks by drawing less power. This isn’t a like-for-like comparison though, given that power draw is different for each test. The 8086K is also not directly comparable in that its die is a different size, and so its dissipative properties are different than the 9700K and 9900K. That said, it is still accurate just with regard to comparing how your temperatures might vary from product-to-product for purposes of cooler selection or upgrades.

Thermally, the 9700K isn’t that hard to cool under auto conditions, and can be kept reasonably cool with our X62 280mm cooler under overclocked conditions. It does become a challenge to overclock beyond 5.1GHz and 1.35V with this cooler, as we’re entering the 90s for some individual core temperatures. Those hottest cores will restrict the rest of the cores

 

[Fasauceome]

Just now, Tigrou said:

I have a 9700K (non OC).

It's a great CPU but it run a little too hot with air cooling for my taste (even with a huge heatsink). I was wondering if a 8700K (which has very similar performance or at least something negligible for me) would be 5-10C cooler.

What CPU cooler are you using? Also, what temperatures?

[Tigrou]

1 minute ago, fasauceome said:

What CPU cooler are you using? Also, what temperatures?

 HR-02 Macho Rev. B

It hit 77 degrees in Crysis 3 on extreme settings with a 1080TI. I haven't tried any 100% CPU stress test yet (like Blender). It's probably a little higher.

 

@Plutosaurus : thanks very helpful. I already saw that review but miss the 8086K result.

[Enderman]

Also as long as the temps are below 90C there is no problem.