Advice Request: 14700k + NH-D15 + Contact Frame + Kryosheet, Thermal Throttling in R23 Multi-Core @ stock

Tetsujin

Tetsujin

Tetsujin

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That London, née Brighton
All running on an MSI Z790 Carbon (original, not the new MAX), with 64GB G.skill 6400 @ XMP, Windows 11; I'm throttling in multi-thread R23 and only averaging 5.3-5.4GHz with both BIOS left at stock (i.e. no effective power limit) and after setting a 288w power limit (for both 1 and 2).

It's idling at ~30c, which seems ok I think (albeit I don't know what my ambient is, but I'm central London and it's pretty chilly).

There's no crashing, but does this sound right, or does this sound like I maybe didn't do either the contract frame or NH-D15 mounts quite right? Maybe not even pressure? Maybe not enough pressure? Or, maybe my CPU is just bad? But surely it should be able to hit its advertised 5.6GHz supposed max clocks, right?

Secondly, I followed this guide and forced 5.5GHz P-core and 4.3GHZ E-cores, with manual 1.35v on the core, and this did crash in R23.
 
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I haven't checked RPMs but the fans do spin up to real "whooshing" levels during R23. I'll check to make sure they're maxed.

Right now it's still just on the floor on top of the motherboard box, but eventually will be in a Be Quiet Dark Base 900.
 
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Thanks for the link!

Did read many reviews in the lead up to buying all this, but I guess I happened across more lucky/optimistic ones.

I've just now rebooted after dropping both power limits to 253 instead of 288 and, while R23 is still running, provisionally the bar is a few pixels longer still than the 288w run and it's not quite hitting 100c any more, ~95 tops. Curiouser and curiouser.

Edit: spake too soon - the still in-flight 253w R23 run is now looking to land just under the 288w one.
 
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Tetras said:
If you have air cooling, trying to hit reasonable clocks/temps with these CPUs in multithreaded benchmarks is like trying to knock a nail with a sponge hammer. Just my opinion, but eh :D
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:D

Yeah I found a mix of "don't even bother" and "it'll be fine with a contact frame and NH-D15" when doing my research, so I guess the latter batch had got my expectations a little out of alignment.
 
Drumroll said:
Using HWinfo, what is the bottleneck listed? Voltage, temperature? If you manage to dial back the voltage a bit it may help with higher clocks, but it is a long shot.
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Didn't realise HWinfo showed such info, but after resetting and doing more tests just now, it's saying "thermal" and "max turbo" for IA PerfCap, and "thermal" and "voltage" for Ring PerfCap. I did a fresh run with a -0.05v adaptive offset too which at least cleared "thermal" from Ring, so that's a good sign I think!
mattyfez said:
Have you tried resetting bios back to factory and the just enabling xmp, and then applying a negative v-core offset on the CPU?

Also, you've not mentioned what temps your CPU is hitting in cinebench... That's kind of important information.
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Hadn't yet tried this but just did and, with a -0.05v adaptive things got a bit 1960s R&B and knocked 3 degrees off the temps, and it stuck at 5.5GHz for seemingly longer.

Sorry, by thermal throttling I meant it was hitting the built-in 100c limit and bouncing off that. It was doing that stock, but not quite by a degree or two with the -0.05v offset.
Vimes said:
I have set my 14700k with a negative offset of -0.086v in the BIOS and all is well. Could be that my 420mm AF AIO is helping.
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Mine just crashed in R23 at -0.08, fingers crossed my -0.07 run completes...

But overall, I think I'm getting the impression that my chip isn't terrible, it's just behaving as 14700ks tend to?
 
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