Question How to get my i9-14900kf to run cooler ?

[bobbydoors]

Hi everyone.

Recently I built a new system and now I'm not sure what to do with CPU temps. Testing done with cinebench r23 and prime 95.

Idle 30-40°c, stress tests 80-100°c.

Specs:
CPU: i9 14900kf
COOLER: Fractal lumen 360
MBO: ASRock z790 pro
RAM: G-skill 64GB @6400MHz
PSU: Corsair 850
GPU: Gigabyte gaming oc 4070 ti
SSD: Samsung 990 pro (w heatsink)
OS: Windows 11 Pro

Thermalright contact frame with Arctic m-4 paste, 7 case fans (allthough airflow isn't the problem because cpu temps are the same on an open bench).

CPU temps are all over the place since the build. I've tried pretty much everything.

I understand that 14th gen are hot, but I tried a few things and nothing changed. I tried repasting and reseating cooler, changing the aio fans, open bench, etc.

Lastly I tried fiddling with underclocking and undervolting. This is the where I lost any sense I had. No matter the setting nothing with the temps changed. I was using Intel XTU (bios gave the same results). I tried lowering multipliers and voltages - always got a stable system. Leaving multipliers and just undervolting - until stable. Lowering/limiting power draw, etc, etc, etc...

The temps ALWAYS stayed the same. Not higher not lower. The only thing that changed was cinebench score. Bit higher or lower.

In normal use (gaming, some 3d applications, CAD programs) - not stress testing - CPU rarely goes over 90°c, but it does sometimes, and I'm not comfortable with such high temperatures. Or am I overreacting??

Please lay some wisdom on me...

 

[bill001g]

It is not unexpected results with any 13/14900k cpu. They really like to run hot when you run things like cinebench. If you are getting in the 90 degree range for normal use that is perfectly fine. Intel has public said that you can run these chips at 100 degrees constantly and it will not damage them. Seem the actual limit is something like 130.

What do you have the p1/p2 voltages set to. I think the intel standard setting are 125/253 but it is common for some motherboards out of the box to set these higher. A lot of people run these as 4096/unlimited and just let the cpu thermal throttle. What you will see is a 14900k will either hit the thermal limit or it will hit the p1/p2 voltage limit all the time. It is a factory overclocked cpu and will always attempt to ramp it clocks up.

Some AIO do better than others but unless you use liquid nitrogen these cpu chips will hit 100c.

You are likely fine. You can lower the p1/p2 numbers but you might as well have purchased a lower end cpu chip at some point.

 

[bobbydoors]

Actually,
The only thing that lowered the temps, but degraded performance drastically (cinebench went from 38k to 30k) is setting long duration power limit to 125w.

Also, obviously clocks went down from 5,8 to 4,3 for P cores, and from 4,4 to 3,4 on E cores.

 

[TerryLaze]

Actually,
The only thing that lowered the temps, but degraded performance drastically (cinebench went from 38k to 30k) is setting long duration power limit to 125w.

Also, obviously clocks went down from 5,8 to 4,3 for P cores, and from 4,4 to 3,4 on E cores.

Yeah, you don't have to turn it all the way down to 125W ,just as far down as you need to to get the temps you would like to be seeing for your mind's sake.

 

[Gururu]

You got a killer rig. I don’t see anything unusual with the temps. I think if you were seeing prolonged temps (minutes) above 80 in a game or work application it would be a matter of concern. With my 14700k I see spikes between 80-90 but nothing sustained. I wouldn’t be subjecting myself to the agony of stress tests if I wasn’t trying to prove stability in overclocks.

 

[Phaaze88]

The Fractal Lumen series have the same pump location as most Msi MAG+MPG Coreliquids: embedded in the radiator. Do not leave them installed in the roof of the case or you will inevitably burn up the pump. If the radiator isn't installed in the roof of your case, then disregard.

The Lumens and most MAG+MPG Coreliquids share the same OEM: Apaltek, which means that the former may have the same QC issues too.

 

[General_Cool]

You could always delid; many YouTubers have done so and gotten 10-15 degrees celsius cooler temperatures even with overclocks. Its not as difficult as it looks. As a bonus, you don't even have to run it delidded if you're worried, you can buy the copper IHS from Rockitcool and continue to use a normal cooler, but they're sold out right now.

 

[bobbydoors]

Thanks everyone for the info.

I've decided to leave it as is. Although the temps spike sometimes, most of the time everything is ok. I just have to accept that this chip runs hot.

Thx.