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Refrigeration GPUs

ZoritaeZoritae Posts: 29
in Technical Help (nuts n bolts)

Hello everyone
I don't know if this is the right place to raise this kind of problem.  I apologize if this is not the case.
I have a computer with three RTX 4090 GPUs and I have a big problem with the temperature.
I know that liquid cooling would help me a lot, but of course, the radiators would dissipate the heat extracted and the room would end up becoming hell.
I have been seeing that there are water coolers.
Has anyone had the same problem and been able to solve it?
Thanks for reading.

Comments

  • crosswindcrosswind Posts: 8,023

    First, I'm not sure if there's still enough space in the case / tower of your PC to install cooling system for three GPUs... but how high is the temperature of 4090 cards when rendering ? Have you monitored them by using GPU-Z or some software like that ?

    I also have three GPUs mounted, a Quadro 6000, a 3090 and a 4090. Among them, 4090 has the lowest temperature. When there's a full render, 4090 has 70℃ in GPU Temperature, 75℃ in Hot Spot, 95℃ in Memeory Temperature (VRAM), while other 20/30 series cards have much higher temperature. I only have a CPU cooling + 11 fans in the tower but I've not had any issue so far resulted from "high temperature" in the case. Of course, when rendering continuously, air conditioner is usually turned on.

  • ZoritaeZoritae Posts: 29

    Thanks for answering.
    I have the GPUs connected to the board using PCI extensions, and the cards are superimposed on the case.  They obviously don't fit inside the tower.
    For still images it works more or less well.   The problem is when I render video.   After 10-15 minutes, the cards reach 85-90ºC and that's when I start using large external fans.  It works, but the noise is hellish.  I don't have air conditioning, but it's something I've been thinking about for a while.

  • oddboboddbob Posts: 405

    The heat generated and pushed into the room will be the same with watercooling and aircooling but with enough radiator area the card temps and noise will be lower. Plus you can get single slot waterblocks that will do away with the need for the riser cables.

    It wouldn't be cheap but the ideal solution would be a mo-ra 600 external radiator. It doesn't even have to be in the same room but that would require custom cables.

    I have a single 4090 on a mo-ra 420 and the card temps while rendering are 16c over ambient with the fans at 450rpm which is functionally silent.

    The cheap option is to put the PC in a different, cooler room.

  • ZoritaeZoritae Posts: 29

    "...the ideal solution would be a mo-ra 600 external radiator. It doesn't even have to be in the same room ...",  "...The cheap option is to put the PC in a different, cooler room."
    It hadn't occurred to me!
    Thank you very much Oddbob, for the contribution.

  • oddboboddbob Posts: 405

    Zoritae said:

    "...the ideal solution would be a mo-ra 600 external radiator. It doesn't even have to be in the same room ...",  "...The cheap option is to put the PC in a different, cooler room."
    It hadn't occurred to me!
    Thank you very much Oddbob, for the contribution.

    You're welcome. Hope you find a solution that fits your needs.

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