Question High idle temps on my CPU ?

[Aequipondium]

Hi, when I'm not gaming my Ryzen 7 5800X3D sits between 60-70 degrees Celsius. I have 7 normal fans with the front and bottom 6 being intake, there's 1 at the back for exhaust. The cpu itself is cooled by a nzxt kraken elite 360mm with those fans being exhaust and the thermalpaste is mx-6. This is in a nzxt h9 elite case. My rtx 5080 is about 30 c when not gaming so that's all fine.

What's the problem? Is it the aio being on top and being exhaust? Is it the thermal paste? Is it something else? I have no idea, please help.

Sincerely, Aequipondium

 

[Phaaze88]

nzxt kraken elite 360mm with those fans being exhaust ... in a nzxt h9 elite case

Glass roof wouldn't help.
While there IS a small grille set aside for heat to exit there, it's narrow, plus taking a couple turns before exiting the case is less efficient than straight up and out.


Background programs(like a wallpaper engine), or a very high dpi mouse setting keeping a couple cores awake, and the software is just reporting those cores.

 

[Aequipondium]

Glass roof wouldn't help.
While there IS a small grille set aside for heat to exit there, it's narrow, plus taking a couple turns before exiting the case is less efficient than straight up and out.


Background programs(like a wallpaper engine), or a very high dpi mouse setting keeping a couple cores awake, and the software is just reporting those cores.

Do those few background programs really make a difference in temps? While gaming the cpu reaches 75-85 and depending on the game it can even reach 90. I'm reading some people have ambient temps at 40 which is 30 less than I have.

The top grille is a fair point, looking to see if there's a replacement in the Netherlands.

 

[Phaaze88]

Do those few background programs really make a difference in temps? While gaming the cpu reaches 75-85 and depending on the game it can even reach 90. I'm reading some people have ambient temps at 40 which is 30 less than I have.

It's normal for cores to rapidly 'spike' into action, then sleep, over and over, but some applications may keep them from taking breaks, and so, they steadily run warmer, until they reach an equilibrium.

75-85C is OK operating temperature. This pushing 90C in a game though... either the game is that taxing, or there's an issue with displacing the waste heat out of the case fast enough.
By having the AIO radiator as top exhaust, not just the CPU, but the waste heat from all devices below it pass through, but there's just the little grille off to the side - I didn't forget about the rear fan.
It's not enough.

 

[TechyInAZ]

I'd recommend re-seating the CPU cooler and re-apply new thermal paste just to make sure it wasn't an accident on your end.

As a Ryzen 7 5800X3D owner myself; my average idle temps in 78F (25.5C) ambient temperatures is in the 40s. Light loads (and i mean even the lightest load) will bring the chip into the 50s. Medium load, 60s-70s, then anything extreme 90C (TJMax).

This is all running in a Fractal Torrent chassis with a rather puny Noctua 120mm single tower air cooler (compared to your beefy 360mm AIO).

For the record, some games will bring the chip into the 90C range, so be sure you know if the game's your testing stress all eight cores.

I hope this helps!

 

[Aequipondium]

I'd recommend re-seating the CPU cooler and re-apply new thermal paste just to make sure it wasn't an accident on your end.

As a Ryzen 7 5800X3D owner myself; my average idle temps in 78F (25.5C) ambient temperatures is in the 40s. Light loads (and i mean even the lightest load) will bring the chip into the 50s. Medium load, 60s-70s, then anything extreme 90C (TJMax).

This is all running in a Fractal Torrent chassis with a rather puny Noctua 120mm single tower air cooler (compared to your beefy 360mm AIO).

For the record, some games will bring the chip into the 90C range, so be sure you know if the game's your testing stress all eight cores.

I hope this helps!

I'll do that, I've also bought a replacement for the top panel with mesh so the heat can escape directly

 

[JayGau]

You have a NZXT AIO so install CAM and look at your liquid temperature. If it's high when the PC is idle (like 15-20c above room temp) it's either because you are pushing too much hot air through the radiator or your pump is not running fast enough.

I personally got better results with the radiator on the front with intake fans (so the liquid gets cooled down by fresh air), but this config also requires good airflow to take out the hot air from the case (there's no perfect scenario).

If the liquid temperature is suspiciously low like a few degrees above room temp and doesn't go up much when gaming, it's likely because your CPU-cooler coupling is bad.

 

[Aequipondium]

You have a NZXT AIO so install CAM and look at your liquid temperature. If it's high when the PC is idle (like 15-20c above room temp) it's either because you are pushing too much hot air through the radiator or your pump is not running fast enough.

I personally got better results with the radiator on the front with intake fans (so the liquid gets cooled down by fresh air), but this config also requires good airflow to take out the hot air from the case (there's no perfect scenario).

If the liquid temperature is suspiciously low like a few degrees above room temp and doesn't go up much when gaming, it's likely because your CPU-cooler coupling is bad.

With coupling you mean the contact between the aio and the cpu?

I'll check the liquid temps when I'm home from work

 

[Aequipondium]

With coupling you mean the contact between the aio and the cpu?

I'll check the liquid temps when I'm home from work

Liquid temps at idle is 30 so 3 degrees higher than room temp, currently while playing clair obscur expedition 33 the liquid temp is at 48 with cpu temp being 82

 

[JayGau]

The fact that you reach 48c while gaming means that the heat transfer between the CPU and the liquid seems to be ok. But it's too high. The liquid should no get much more than 10c above room temperature. You get 21c. It's likely because the radiator fan configuration is not very efficient. You likely get too much hot air from the GPU going through the rad. A Better airflow or an intake configuration would help.

For idle, the liquid temp looks good despite that your temp is high. You probably have some background apps using a couple of cores so the temp gets high on the sensor while the CPU doesn't consume much power so the liquid doesn't warm up. The 5800X3D has the cache die on the top of the compute die, which kind of traps the heat inside the CPU (there's no direct contact between the compute die and the cooler). So it doesn't require much to increase the temperature even though the power consumption is low. Look at apps running in task manager when you are idle. What is the CPU % usage?

 

[Aequipondium]

The fact that you reach 48c while gaming means that the heat transfer between the CPU and the liquid seems to be ok. But it's too high. The liquid should no get much more than 10c above room temperature. You get 21c. It's likely because the radiator fan configuration is not very efficient. You likely get too much hot air from the GPU going through the rad. A Better airflow or an intake configuration would help.

For idle, the liquid temp looks good despite that your temp is high. You probably have some background apps using a couple of cores so the temp gets high on the sensor while the CPU doesn't consume much power so the liquid doesn't warm up. The 5800X3D has the cache die on the top of the compute die, which kind of traps the heat inside the CPU (there's no direct contact between the compute die and the cooler). So it doesn't require much to increase the temperature even though the power consumption is low. Look at apps running in task manager when you are idle. What is the CPU % usage?

Idle usage is 14% with temperature being 70 degrees Celsius, liquid is 35 which is 8 degrees above room temperature and the GPU is at 37 degrees Celsius. Front 3 fans and bottom 3 fans are intake with the 3 fans of the aio on top and 1 at the back being exhaust. I did buy a replacement top with holes in it so that the exhausted air from the aio fans doesn't have to take turns and can instead exhaust directly.

 

[JayGau]

Idle usage is 14% with temperature being 70 degrees Celsius, liquid is 35 which is 8 degrees above room temperature and the GPU is at 37 degrees Celsius. Front 3 fans and bottom 3 fans are intake with the 3 fans of the aio on top and 1 at the back being exhaust. I did buy a replacement top with holes in it so that the exhausted air from the aio fans doesn't have to take turns and can instead exhaust directly.

And which processes are using so much CPU? I have plenty of background apps running (iCUE, Logitech Hub, MSI Afterburner plus the usual Windows stuff) and my CPU usage is around 3% at idle (mostly because of iCUE that is controlling a lot of stuff) and I have a 9800x3d, so 8 cores like yours. You have something running that makes your CPU permanently working quite hard. Sort the processes according to the CPU usage in task manager to see what is causing this.

And yes, having a more open top will help with the airflow a lot. I think you currently have too much intake and not enough exhaust, causing a too high positive pressure. You need to get more air out.

 

[Aequipondium]

And which processes are using so much CPU? I have plenty of background apps running (iCUE, Logitech Hub, MSI Afterburner plus the usual Windows stuff) and my CPU usage is around 3% at idle (mostly because of iCUE that is controlling a lot of stuff) and I have a 9800x3d, so 8 cores like yours. You have something running that makes your CPU permanently working quite hard. Sort the processes according to the CPU usage in task manager to see what is causing this.

And yes, having a more open top will help with the airflow a lot. I think you currently have too much intake and not enough exhaust, causing a too high positive pressure. You need to get more air out.

Theres wmi provider host at 5% which fluctuates to and between 1%. Nzxt cam is 2% the rest are below 1%. Occasionally steam client webhelper going to 1 and back to 0.5% again. Overall is down to 13% but temps are still at 68 degrees