105W TDP CPU considerations - DAN A4-SFX v4.1

[JohnTinkerer]

Hello Community,

I'm looking at the AMD Performance^ and High-End^ tested configurations and the High-End lists 105W TDP CPU (AMD Ryzen 9 5950X, 16C/32T, 3.40-4.90GHz) as working configuration.

I was wondering what is the hands-on experience like with these high TDP CPU setups - are the temperatures really borderline high or assuming the proper CPU cooler is used (Noctua NH-L9a-AM4 chromax.black) there are no issues?

I'm considering the AMD Ryzen 9 5900X 105W TDP (12C/24T 3.70-4.40GHz) or AMD Ryzen 7 5800X 105W TDP (8C16T 3.80-4.70GHz) as it's significantly cheaper...

Thank you for any opinion.

 

[SiKiaTriK]

Hello Community,

I'm looking at the AMD Performance^ and High-End^ tested configurations and the High-End lists 105W TDP CPU (AMD Ryzen 9 5950X, 16C/32T, 3.40-4.90GHz) as working configuration.

I was wondering what is the hands-on experience like with these high TDP CPU setups - are the temperatures really borderline high or assuming the proper CPU cooler is used (Noctua NH-L9a-AM4 chromax.black) there are no issues?

I'm considering the AMD Ryzen 9 5900X 105W TDP (12C/24T 3.70-4.40GHz) or AMD Ryzen 7 5800X 105W TDP (8C16T 3.80-4.70GHz) as it's significantly cheaper...

Thank you for any opinion.

According to Noctua's website, you shouldn't attempt to cool a 5950X with the NH-L9a. It can't even handle the base clock of that beast (same goes for the 5900X).

5950X / 5900X --> https://ncc.noctua.at/cpus/model/AMD-Ryzen-9-5950X-1044

On the other hand it seems to handle the 5800X just on bare minimum

5800X -- > https://ncc.noctua.at/cpus/model/AMD-Ryzen-7-5800X-1046

Despite the bad news I hope this helps you

 

[thelaughingman]

Hello Community,

I'm looking at the AMD Performance^ and High-End^ tested configurations and the High-End lists 105W TDP CPU (AMD Ryzen 9 5950X, 16C/32T, 3.40-4.90GHz) as working configuration.

I was wondering what is the hands-on experience like with these high TDP CPU setups - are the temperatures really borderline high or assuming the proper CPU cooler is used (Noctua NH-L9a-AM4 chromax.black) there are no issues?

I'm considering the AMD Ryzen 9 5900X 105W TDP (12C/24T 3.70-4.40GHz) or AMD Ryzen 7 5800X 105W TDP (8C16T 3.80-4.70GHz) as it's significantly cheaper...

Thank you for any opinion.

I used 3900X with L9a for about 2 months. Temps are unacceptable with stock clock, let alone PBO enabled. The only way to make it work at acceptable temp is to turn ECO mode on to limit the CPU to just 65W PPT. As such, just get a 5600X if you plan to stick with the Dan A4; if you want to use 5900X, get a larger case for more cooling capacity.

 

[dondan]

The trick is to use ECO mode. I had no problems here with a 3900X the L9a + fan duct or Thermalright AXP90 Copper in Chinebench or Gaming.
For best temps get the AXP90 Copper.
Keep in mind that the 5950x and 5900x will stay cooler in ECO mode than the 5800x because of its DIE configuration.

 

[JohnTinkerer]

The trick is to use ECO mode. I had no problems here with a 3900X the L9a + fan duct or Thermalright AXP90 Copper in Chinebench or Gaming.
For best temps get the AXP90 Copper.
Keep in mind that the 5950x and 5900x will stay cooler in ECO mode than the 5800x because of its DIE configuration.

I downloaded the BIOS manual from the ASUS website on the recommended ASUS ROG STRIX B550-I GAMING^ and there is not a single mention of "ECO" or even "Watt" related to this. I also read through the section "CPU Configuration" (page 26) and "AMD Overclocking" on page 35 and nothing there. I admit I'm a bit out of shape on this the last desktop I had was around 2012 and was buying laptops since...

What is it actually called on most motherboards this "ECO" mode?

I'm actually now also thinking about the Ryzen 7 5700G (3.8GHz,45-65W,L3:16M,8C) it's less CPUs cores than I wanted but seems way less trouble...

What motherboard do you currently have your hands on?

 

[JohnTinkerer]

OK apparently according to this: https://www.techarp.com/computer/ryzen-eco-mode-guide/

It's arranged by a 3rd party app called "AMD Ryzen Master Utility^" the trouble is I'm using Linux and it does not seem to be supported.

But it seems that if you enable in BIOS "Precision Boost Overdrive" then you (hopefully) can in section "SMU Common Options" switch to Manual, which should allow for: "SmartShift Control" to be set to Manual and there you can select in "System Configuration AM4":
"Configuration options:"

[35W COMMERCIAL and CONSUMER SYSTEM CONFIG 1]
[45W COMMERCIAL and CONSUMER SYSTEM CONFIG 2]
[65W COMMERCIAL - SYSTEM CONFIG 3]
[65W CONSUMER - SYSTEM CONFIG 6]
[Auto]

Which should be the "ECO" mode, can somebody confirm please? I would like to get my rig as soon as possible and clarity on this would help...

 

[dondan]

I have a Gigabyte board here was it like i said. But yes RyzenMaster is also an option.

 

[Shaytanya]

I don't use AMD, but I can comment on high end CPU temps on a custom modded Dan A4.1 - I have a Asus z490 i-gaming mobo, and a i5-10600K CPU - I use the Acetek AIO cooler and the CPU thermals are absolutely fine. However, due to the lack of airflow over the M.2 drives, these were getting very hot (dangerously hot) - I have had to install a Noctua 40mm 5000RPM fan over the M.2 drive which has pushed the temps way down to where they should be.

For reference I have the 3080FE, so that is also exhausted heat into the case, as well as using a high power draw as well as the CPU but it is manageable and not running dangerously hot whilst gaming at 4k.

I have also put a custom OC on, as well as cutom fan curves to optimise the temps/heat/noise tradeoff

 

[thelaughingman]

I use the Acetek AIO cooler and the CPU thermals are absolutely fine

OP wants to use the L9a. If he were to use the LT645 like you did, the temp would be fine on AMD as well