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Power supplies and the 3080s & 3090s

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rchiwawa
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2021/03/01 12:40:02 (permalink)
I have read in passing that these GPUs can be quite the burden on power supplies. Are there any known problematic lines with regard to false overcurrent/short detection. I have a 1kw Seasonic and an SF750 and searching didn't really come up with anything substantial. Was hoping the pros here could give me the skinny.

Thanks
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    CraptacularOne
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    Re: Power supplies and the 3080s & 3090s 2021/03/01 13:41:03 (permalink)
    Without knowing the rest of your system specs, there isn't really anything we can give advice on. 

    Intel i9 14900K ...............................Ryzen 9 7950X3D
    MSI RTX 4090 Gaming Trio................ASRock Phantom RX 7900 XTX
    Samsung Odyssey G9.......................PiMax 5K Super/Meta Quest 3
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    rchiwawa
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    Re: Power supplies and the 3080s & 3090s 2021/03/01 18:15:14 (permalink)
    I was seeking information on the inrush current demand of the aforementioned GPUs being problematic for particular powersupplies well within their capacity causing protection trip... I could have sworn that this was a marginal concern.

    Fwiw I have the Seasonic Gold rated Prime 1KW powering the following:

    5950x
    Crosshair VIII Formula
    2080 Ti Ftw3 Ultra hydro copper
    A couple of 4TB NVME Pcie 4 drives
    A couple of 4TB Evo 860 Sata drives.
    A 16TB WD gold drive
    A Blu-ray writer
    12 140mm fans
    A couple of corsair commander pros
    A d5 pump

    CPU and GPU fully loaded up and the PSU fan infrequently spins up (say 30 seconds on @ low speedand then 15 minutes off). I know it has capacity to spare... just thinking about that spike test cards are reputed as having and maybe somethkng about some seasonics not liking it.
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    Dabadger84
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    Re: Power supplies and the 3080s & 3090s 2021/03/01 18:24:12 (permalink)
    I would say that Seasonic is most likely plenty.  Those are usually quality made units - seriously doubt it will have any issue even if you push your 5950x pretty hard.
    If you're concerned about spikes, hit it with a AIDA64 stress test, if it doesn't insta-shut down when the card gets loaded, you're fine.  CPU FPU Cache & Memory + GPU - if you stress all of those at once, that will be an unrealistic load, but also the "worst it can get" on PSU load, for your system.
     
    The OCP/etc being tripped is pretty unlikely on a unit that hefty though, at least I would hope not.

    ModRigs: https://www.modsrigs.com/detail.aspx?BuildID=42891  
    Specs:
    5950x @ 4.7GHz 1.3V - Asus Crosshair VIII Hero - eVGA 1200W P2 - 4x8GB G.Skill Trident Z Royal Silver @ 3800 CL14
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    rchiwawa
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    Re: Power supplies and the 3080s & 3090s 2021/03/01 18:36:34 (permalink)
    I would hope not as well but what I remember reading the Seasonic was dropped enough to stick in memory . Sounds like whatever it is I came across its a fringe or non existent issue. Thanks for the solid guidance
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    RVAPack
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    Re: Power supplies and the 3080s & 3090s 2021/03/01 19:21:16 (permalink)
    Didn't LTT or GN do a video on this? If the recommended for those it 700+ I would imagine there is some sort of standard expected watt per rail to be expected prior to a short or failure


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    rchiwawa
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    Re: Power supplies and the 3080s & 3090s 2021/03/01 20:26:25 (permalink)
    I'll check them in the morning for content... sounds like something GN would cover. One of those things I heard some murmuring about early on and it disappeared... I just wanted a lay of the land before I look into picking one up
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