Is my 750W-Seasonic Tx enough for Rtx 3090?

Discussion in 'Videocards - NVIDIA GeForce' started by jmmy23, Oct 16, 2020.

  1. jmmy23

    jmmy23 Master Guru

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  2. CPC_RedDawn

    CPC_RedDawn Ancient Guru

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    You should be fine, you have a relatively low power CPU and a really strong 750W PSU. I doubt you will come close to saturating that PSU even with a 3090. Just be careful when and if overclocking as the 3000 series has some weird voltage spikes during load which can trip a PSU's overvoltage protection this is the main reason why Nvidia recommend such high powered PSU's as they tend to come with stronger over voltage protection.

    I would be more worried about that 9700K bottlenecking the 3090 unless you are gaming at 4K or doing some serious render work then a 3090 would be a bad choice, I would wait for AMD and also wait for the 20GB 3080 would save you some cash too as I doubt this card would over over $900.
     
  3. SpajdrEX

    SpajdrEX AMD Vanguard

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    Yeah, it's more than enough.
     
  4. jmmy23

    jmmy23 Master Guru

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    So no change psu?:)I will be not oc 3090.
     

  5. SpajdrEX

    SpajdrEX AMD Vanguard

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    Definitely not needed to change the PSU :)
     
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  6. jmmy23

    jmmy23 Master Guru

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    Oki thank you for helping.
     
  7. jmmy23

    jmmy23 Master Guru

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    Last question. Somebody on RTX 3090 owners.


    "So I have this issue with my 3090 FE and it's when I play with power limit and set it to 114% my card power peaks around 390-395W of power but after playing a game at that power limit my pc will just shut down. Do you think I am hitting my psu power limit and it just shuts down? I am on Seasonic Prime TX-850 Titanium (not even a year old). It's only when I play with power limit

    Here's one game where it will play for a bit and just randomly shut off my pc. Temps are good all around so the only thing I can think of is 850W is not enough power for this card
    ."


    . So without oc and raising power limit i will be not have shutdowns like him:)?
     
  8. Astyanax

    Astyanax Ancient Guru

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    That remains to be seen.
     
  9. jmmy23

    jmmy23 Master Guru

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    Hmm but he have 850W and its not enough then? Also he is using 1x12 pin adapter.
    My card will be have 2x8 pin.
     
  10. Zooke

    Zooke Master Guru

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    I remember you from previous threads and am fully aware that no matter what we say, you will not be satisfied.
    That being said,
    Seasonic is a quality brand for PSU's and the one you own is top quality.
    Basic numbers are 350W GPU + 100W CPU + 50W (rest of bits you listed). That's 66% usage of your PSU.

    Personally I think what you have listed would not draw anywhere near 700W in a built system with fans + the rest of the unnamed stuff, but it must be noted that you are hardly leaving yourself with massive headroom.
    Because of the price difference between a 3090 and a more powerful PSU, I feel obliged to say that if you want to buy a 3090 then do so, and if theres any issues then you're going to need a bigger boat, I mean PSU.
    No point fretting about a component that is less than 1/5th of the price of the GPU you desire is there.
     
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  11. jmmy23

    jmmy23 Master Guru

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    Somebody told me this:"750w is not enough. You need at least 850w or more to ensure system stability, especially overclocking."

    IS this true?<last question>
     
  12. SpajdrEX

    SpajdrEX AMD Vanguard

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    As your PSU have Platinum rating it can bring extra 100W without any issue, with your current PC setup this is not gonna happen anyway, but it should make you feel safe :D
     
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  13. CPC_RedDawn

    CPC_RedDawn Ancient Guru

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    This is over current protection, Ampere cards seem to have spikes in voltage the cards asks for, leading to some PSU's tripping their over voltage protection even though the PSU is more than capable of running the card just fine. Its the way Ampere was designed.

    Check out Linus Tech Tips video on SLI RTX3090's he talks about the over voltage tripping and says that this is the first time we can actually go by what Nvidia recommends for PSU and probably even higher to be safe.



    Watch from the time stamp
     
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  14. jmmy23

    jmmy23 Master Guru

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    But this FE edition card with 1x12 pin adapter:) AIB have 2x8 pin , if that does matter?

    You said:"This is over current protection, Ampere cards seem to have spikes in voltage the cards asks for, leading to some PSU's tripping their over voltage protection even though the PSU is more than capable of running the card just fine. Its the way Ampere was designed."


    What psu's you mean?
     
  15. insp1re2600

    insp1re2600 Maha Guru

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  16. jmmy23

    jmmy23 Master Guru

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    He said:"when Full load I saw 900watt pull from wall using wattmeter"

    Tested using a windows PC Intel 10980XE @ 5.0 Ghz (custom loop) , rtx 3090


    So it was because hes strong cpu?
     
  17. Dan Longman

    Dan Longman Member Guru

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    [​IMG]
    10980XE @ 5Ghz can pull 500w itself throw on the 3090 and I could easily see 900w on that system.

    your CPU is going to be pulling ~400w less you *should* be fine with your PSU and a 3090 but you never know.

    When I first got my 2080ti with it overclocked and my CPU at the time was ryzen 1600 heavily overclocked and in certain games I would hit the protection on my Seasonic Focus Gold+ 650w and slam the system down. Upgraded to 850w model of the same PSU and had no issues. Still running it but with my current 3700x using only PBO my power usage is a fair amount lower than it was 2 years ago with my 1600 lol
     
  18. jmmy23

    jmmy23 Master Guru

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    Ampere card can pull a huge amount of watts for a split second in games and benchmarks which can trip over current protection on psu's and many 750w units can fall foul.



    Anyway should be ok?
     
    Last edited: Oct 17, 2020 at 2:47 PM
  19. Dan Longman

    Dan Longman Member Guru

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    Dude what more do you need to be told??

    Give it a try if your PC slams down due to Over Current Protection nothing will get hurt - Then you can upgrade your PSU.
    Or just buy a new PSU to be safe.

    Seriously chill the frack out.
     
  20. alanm

    alanm Ancient Guru

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    I remember this dude from AT forum many years ago. Even when he is aware that he's annoying the hell out of others by ignoring all their advice, HE WILL NOT STOP.
     

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