Air cooling a Ryzen 9 5900x?

Edward78 · 27 Dec 2021 at 18:51

Any 82mm that will?

sgoaty · 27 Dec 2021 at 18:52

Wraith prism will cope to an extent as long as you're not expecting high boost clocks.

Edward78 · 27 Dec 2021 at 19:20

sgoaty said:
Wraith prism will cope to an extent as long as you're not expecting high boost clocks.

No, I am not wanting to OC at all. really a Prism for a R9 5900x??? Do they have a none X version? No undervolting/clocking needed?

sgoaty · 27 Dec 2021 at 19:42

Yes I've done it myself on an open bench with my 5900X it was absolutely fine. The CPU would throttle itself to keep in safe operating range if need be.

jigger · 27 Dec 2021 at 21:00

As long as you have half decent system cooling and don’t have a high end graphics card dumping heat into the case the 5900X isn’t a hard CPU to cool.

Minstadave · 27 Dec 2021 at 21:08

I ran a 3900X on a Wraith Prism and it was fine apart from the noise, can always dial down power target if you need lower temps.

Mesai · 27 Dec 2021 at 21:08

Why get a 5900x and undercool it though? Get a cheaper CPU that runs cooler.

lee32uk · 27 Dec 2021 at 23:54

Mesai said:
Get a cheaper CPU that runs cooler.

How does that work ? Assuming he needs a 12 core cpu then dropping down to a 5600X isn't going to help much.

Mesai · 28 Dec 2021 at 00:03

lee32uk said:
How does that work ? Assuming he needs a 12 core cpu then dropping down to a 5600X isn't going to help much.

What’s the use of a 12 core CPU if it’s constantly throttled by an entry level cooler? If you aren’t utilising the improved IPC and higher clocks, get an older threadripper or 3900x and use the difference for proper cooling.

If you need the cores for productivity, and rely on it, then using insufficient cooling is going to reduce its lifespan/risk failure.

Cyber-Mav · 28 Dec 2021 at 00:22

you would be surprised how well zen3 scales with power. set a 5600x to 25w ppt limit and its still very quick.

jigger · 28 Dec 2021 at 13:02

Mesai said:
What’s the use of a 12 core CPU if it’s constantly throttled by an entry level cooler? If you aren’t utilising the improved IPC and higher clocks, get an older threadripper or 3900x and use the difference for proper cooling.

If you need the cores for productivity, and rely on it, then using insufficient cooling is going to reduce its lifespan/risk failure.

It’s more likely the result will be higher noise levels and power use will become the limiting factor.

lee32uk · 28 Dec 2021 at 13:23

Mesai said:
What’s the use of a 12 core CPU if it’s constantly throttled by an entry level cooler? If you aren’t utilising the improved IPC and higher clocks, get an older threadripper or 3900x and use the difference for proper cooling.

If you need the cores for productivity, and rely on it, then using insufficient cooling is going to reduce its lifespan/risk failure.

Why are you assuming it would constantly throttle ? An older Threadripper 12 core isn't going to match up well to a 5900X, and you would need a different board anyway. As for the 3900X that isn't any cooler.

https://www.techpowerup.com/review/amd-ryzen-9-5900x/20.html

We would really need to know what the op is doing with the pc, and also what case he has before we can make any suggestions.

Dreadi · 28 Dec 2021 at 18:18

You could undervolt it, that knocked quite a bit off my 5800x temps if you're going to try the prism on it

Ross Thomson · 28 Dec 2021 at 19:37

why such a small cooler?

Mesai · 29 Dec 2021 at 10:54

lee32uk said:
Why are you assuming it would constantly throttle ? An older Threadripper 12 core isn't going to match up well to a 5900X, and you would need a different board anyway. As for the 3900X that isn't any cooler.

https://www.techpowerup.com/review/amd-ryzen-9-5900x/20.html

We would really need to know what the op is doing with the pc, and also what case he has before we can make any suggestions.

It’s less about other options being cooler and more about having the funds available to sufficiently cool it while still getting to needed core count.

Maybe the CPU was a gift otherwise I don’t know why you’d spend all that money and skimp on cooling.

IceBear · 29 Dec 2021 at 11:30

Is this for some small form factor rig by any chance ?

lee32uk · 29 Dec 2021 at 13:38

Edward78 said:
Any 82mm that will?

You already own the cpu ?

What case are you using ?

Also what is the pc being used for ?

lee32uk · 29 Dec 2021 at 13:39

Mesai said:
It’s less about other options being cooler and more about having the funds available to sufficiently cool it while still getting to needed core count.

Maybe the CPU was a gift otherwise I don’t know why you’d spend all that money and skimp on cooling.

He might have a small form factor case and if so there won't be a lot of options for a cooler. I have asked the question above so we shall see.

Edward78 · 29 Dec 2021 at 15:23

lee32uk said:
You already own the cpu ?

What case are you using ?

Also what is the pc being used for ?

I have the RVZ02 now.

Donnie Fisher · 30 Dec 2021 at 16:33

I run a 5800x with a prism. Disabled PBO etc and just set the multiplier to 44. The system will sit mid 80’s under all core load at 4.4ghz and not throttle. Sits high 30s at idle.

I don’t need the all out max speeds that pBO offers and just wanted good stability which I seem to have

I imagine the 5900x would be similar.