5900X temps under load wirth PBO, 85C+

[PDifolco]

Hi guys&gals

 

I'v recently got a 5900X and still playing with OC/PBO settings

What I've now is:

thermal limit at 85C

Mobo limits (Aorus X570 Pro) that are at least PPT 200W TDC 140A EDC 200A (figures are the max under CB23 with TL 85C)

Undervolt -30 (works only with high EDC, at EDC <130 I can only get -20)

 

Seems to run stable, CB23 score around 22700

 

Now with a 280mm AIO once I launch CB23 temps near instantly raise to 85C, and would go even higher if I didn't set a thermal limit 

While I know that 5900X are supposed to run at 90C+ it still "looks" pretty high, maybe shorten the chip's life, and that's a ton of heat near my case (which has rather bad airflow as it is enclosed under my desk, but I can't put in anywhere else !)

 

So is there any way to reduce temps while still  using PBO, or do you think I should just remove TL ?

I also have a D5 pump I can install to help my AIO, would that reduce temps (I'm not sure because it goes up so quick I don't think anything can really prevent it)

 

 

[Oops I Did It Again]

I can't really speak to your technical questions, but in terms of air flow could you at least create some ventilation to exhaust the hot air from your desk? Found this in 2 seconds on google, this guy has an exhaust and intake (it seems), so when the door is closed there's airflow.

[FliP0x]

Could be bad silicon.

I run my 5900x at -25 and I don't hit 80c in Stresstests.

Cooled with an Arctic Liquid Freezer II 280

[PDifolco]

15 minutes ago, Oops I Did It Again said:

I can't really speak to your technical questions, but in terms of air flow could you at least create some ventilation to exhaust the hot air from your desk? Found this in 2 seconds on google, this guy has an exhaust and intake (it seems), so when the door is closed there's airflow.

Nah, I've seen that pics too, but my desk is a custom desk in a corner, mounted to the walls left and rear.. There is a small vent on the top only to pass cables,

I could open a vent on the right but then I 'd have hot air pushed right on my legs, which is not very desirable...

[Oops I Did It Again]

3 minutes ago, PDifolco said:

...but then I 'd have hot air pushed right on my legs, which is not very desirable...

I feel that, brother. Toasty computer components are also not desirable lol. Good luck 

[PDifolco]

1 hour ago, FliP0x said:

Could be bad silicon.

I run my 5900x at -25 and I don't hit 80c in Stresstests.

Cooled with an Arctic Liquid Freezer II 280

My cooler is an Alphacool 280 with fans replaced for Arctic P14s

But as I said I don't think cooling is that important here, as the CPU goes from 40 to 80C+ after a mere handful of seconds, so nothing can prevent that

 

And what are your core clocks under CB23 ? Mine goes to 4.6GHz all cores, then drop a bit and stabilize around 4.55, throttling due to TL

 

[FliP0x]

1 hour ago, PDifolco said:

My cooler is an Alphacool 280 with fans replaced for Arctic P14s

But as I said I don't think cooling is that important here, as the CPU goes from 40 to 80C+ after a mere handful of seconds, so nothing can prevent that

 

And what are your core clocks under CB23 ? Mine goes to 4.6GHz all cores, then drop a bit and stabilize around 4.55, throttling due to TL

 

I tested with CB and Prime95 to test temps and stability. I got the full 4.8-4.9 GHz at (maybe) slightly above 80c at the hottest core.

 

 

[PDifolco]

43 minutes ago, FliP0x said:

I tested with CB and Prime95 to test temps and stability. I got the full 4.8-4.9 GHz at (maybe) slightly above 80c at the hottest core.

 

 

All cores 4.8 ghz on a B550 board ? That's pretty exceptional, which score do you get on CB23??

[FliP0x]

9 hours ago, PDifolco said:

All cores 4.8 ghz on a B550 board ? That's pretty exceptional, which score do you get on CB23??

Here's a 10 minute test I just ran. Prime95 and CB23 to get as much thermal output as possible.

 

As for CB23 results, I'll have to rerun cb23 on its own tomorrow because my last test results weren't logged.

 

Edit:

Cb23 results as promised.

22177 multi core

1605 single core

*Test were run with background tasks and other programs running

 

 

 

[GetTheClicker]

You could feed it cold air directly from an A/C with some aluminum tubing and a 3k fan for added air flow. My setup is a bit ratchet but it's not the final product. 

5950x on an MSI X570 gaming edge wifi board. 

[Somerandomtechyboi]

2 hours ago, GetTheClicker said:

You could feed it cold air directly from an A/C with some aluminum tubing and a 3k fan for added air flow. My setup is a bit ratchet but it's not the final product. 

5950x on an MSI X570 gaming edge wifi board. 

At that point might aswell just build a god damn waterchiller and run near ambient/sub zero temps or hook up a car radiator to your pc cause its just as bulky anyways

[PDifolco]

12 hours ago, FliP0x said:

Here's a 10 minute test I just ran. Prime95 and CB23 to get as much thermal output as possible.

 

As for CB23 results, I'll have to rerun cb23 on its own tomorrow because my last test results weren't logged.

 

Edit:

Cb23 results as promised.

22177 multi core

1605 single core

*Test were run with background tasks and other programs running

 

 

 

I was up to 22.6K multi in CBR23, but indeed increasing severely PPT/TDP/EDP just makes a ton of heat for only a small increase

Reverting to standard limits (PPT 140W TDC 130A EDC 140A) and undervolt -20 gives comparable results to yours at 21.5K Multi / 1607 single, and max temp around 70C only instead of 85C !

Max OCing 5900X really needs a ton of cooling!

 

[FliP0x]

20 minutes ago, PDifolco said:

I was up to 22.6K multi in CBR23, but indeed increasing severely PPT/TDP/EDP just makes a ton of heat for only a small increase

Reverting to standard limits (PPT 140W TDC 130A EDC 140A) and undervolt -20 gives comparable results to yours at 21.5K Multi / 1607 single, and max temp around 70C only instead of 85C !

Max OCing 5900X really needs a ton of cooling!

 

Yeah, I did a lot of testing and settled at about -20 to -25 (don't remember exactly). Anything lower than that also crippled my boost clocks.

[PDifolco]

24 minutes ago, FliP0x said:

Yeah, I did a lot of testing and settled at about -20 to -25 (don't remember exactly). Anything lower than that also crippled my boost clocks.

 

My experience was rather that undervolting increased clocks, but going lower than -20 requires increasing EDC (else it crashes ), then having the cores run faster needs increasing PPT to 200W. Using mobo limits did the trick, but eventually that's too much heat for my 280mm cooler to handle, reverting back to stock limits is -15C...

 

I'll retry after adding a D5 pump to the circuit (I'm just lazy to do it quickly lol)