Question Pairing a Ryzen 78003DX with a Thermalright Phantom Spirit 120 EVO CPU Cooler - - thoughts ?

[Dave Naka]

HI all,

First build since my old i3570.

I'm planning to pair an AMD 78003DX with a Thermalright Phantom Spirit 120 EVO CPU Cooler on a MSI Pro B650-P in a NZXT H7 Flow (2022) with 3x Noctua NF-P12 fans on top as exhaust, one in front plus the stock case fan as intake, and the stock case fan as intake in the rear. I just read that AMD suggests an AIO cooler for the 78003DX, think this will work or should I shut the build down and get an AIO?


TIA

 

[CountMike]

HI all,
First build since my old i3570.

I'm planning to pair an AMD 78003DX with a Thermalright Phantom Spirit 120 EVO CPU Cooler on a MSI Pro B650-P in a NZXT H7 Flow (2022) with 3x Noctua NF-P12 fans on top as exhaust, one in front plus the stock case fan as intake, and the stock case fan as intake in the rear. I just read that AMD suggests an AIO cooler for the 78003DX, think this will work or should I shut the build down and get an AIO?

TIA

TDP is 120W and that cooler should do fine.
As for case fans, put most in front as intake, Rear as exhaust and on top as exhaust but none before the CPU cooler as that would take some cooler air from CPU cooler.

 

[geofelt]

The cooler is reasonable. It has about the cooling capability of a 240 sized aio.
Noctua maintains a list of suitable coolers for various processors.
Here is the list for the7800x3d:
https://ncc.noctua.at/cpus/model/Ryzen-7-7800X3D-1649

On fans, you want airflow.
Put your 3 noctua fans in front as intake. You really need nothing more.
Whatever cooling air comes in the front will exit SOMEWHERE taking component heat with it.
Use a single exhaust fan at the rear to direct the cooling air past the cooler, motherboard and graphics card.
Using top fans as exhaust will tend to divert the front airflow up and out of the case without doing much good.

Fans are not hard to change if you want to experiment.

 

[QyInvoLing]

I'm using Deepcool AN600 which is a 67mm ITX cooler for my 7950X3D. The CPU's idle temp is 67°, and when I'm playing valorant with 20% CPU usage and my A770 Flux consuming 200Watts, it's 75°, everthing is fine.

I also used benchmark tools(CPUz and Furmark) together to test the system's performance under extreme heavy workloads, and the result is fine too:A770 consumes 200watts and stays at 70°, 7950x3d consumes 110w power, all cores are at 4.6GHz, and the CPUz score is 12900, a bit higher than 12900K. This test is done in a Shinysnake S400v2 ITX case where the graphics card directly hang over the back of the MB, so the graphics card is heating the CPU, even in this condition 7950x3d can consume 110watts——given this conclusion, I think you should not be worrying about the cooler, just pick anything you want and don't consider about the performance. 7800x3d can never consumes more than 90w in most scenes.

 

[Dave Naka]

Thanks for the help, gang. This is going to be used for casual flight simming, may not even load the new MSFS and stick with my old Steam FSX since that's what all my airplanes/scenery are for.

I think I'll remove the top exhaust fans and flip the rear fan around so it's an exhaust, that will give a 3 in/1 out, with the rear exhaust fan aligned almost directly with the 120 EVO, and other airflow can exhaust out the top of the case.


Boy, things have sure changed....