Gigabyte UD850GM PG5 PCIE5 850W 80+ Gold Fully Modular Power Supply $165 + Delivery ($0 SA, NSW, QLD C&C) @ PCByte

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srhardy on 14/02/2023 - 20:45 pcbyte.com.au (168 clicks)
Last edited 15/02/2023 - 12:12 by 2 other users

With the advent of the higher end nVidia 3090 card and the new line of 4070/80/90 … whatever post this date, all use the new ATX 3.0 PCIE 5.0 standard 16 pin PSU cable, capable of 600watts. If your GPU takes 2 of these, well this PSU isn't for you and your looking for one over 1200watts! Anyway I paid $220 for a TUFF from eBay delivered before finding this nugget and FYI, if your buying or building or upgrading/refurbishing a PC system build in 2022 this is a must have IMO.

BE AWARE some lastgen PSU say they are PCIE5 ready but the fine print is that you can buy an adaptor lead (pcie>pcie5) from the PSU to the GPU. These PSUs dont have the pcie5 smart energy monitoring of a genuine pcie5>pcie5! Its the same as using the adaptor that may have come with your GPU in the box!

On that note, YES you can just use your adaptor from the box usually (but you need a min 750w PSU, 850w has a tad of margin)

Now I hope these get cheaper but quality can suck, so Id still be keeping with known brands with warranty. Also no, this isnt the gigabyte psu's that caught fire a couple of years ago. Im hoping gigabyte have learnt their lesson and upgraded to not ever see a repeat of that cluster%X!

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  Lief on 14/02/2023 - 20:51

  +1

  Do Gigabyte PSUs still get you on the terrorist watch list or did they fix the exploding thing?

  • 

    thestripedlion on 14/02/2023 - 20:57

    +1

    They fixed it… but itsup to you to buy.

  • 

    reactor-au on 14/02/2023 - 21:53

    +1

    I can't bring myself to take the chance either

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  late on 14/02/2023 - 21:12

  Not ATX 3.0 and there's no such thing as "smart energy monitoring". The signals are card exists and power good.

  Read the spec here
  https://edc.intel.com/content/www/us/en/design/ipla/software…

  Also no consumer card or psu implements the optional signals anyway

  • 

    srhardy on 15/02/2023 - 21:06

    Thanks for the link and nVidia DO or CAN use these signals if you have a PSU that provides it.

    ATX Version 3.0 Multi Rail Desktop Platform Power Supply
    Design Guide : PCIe* Add-in Card Auxiliary Power Connectors Sideband Signals
    The new 12VHPWR connector has 4 sideband signals defined that communicate between the Power Supply and the PCIe* Card. Two of these sideband signals are required with the connector and two of them are optional from the Power Supply. The four sideband signals are:

    SENSE0
    SENSE1
    CARD_​PWR_​STABLE
    CARD_​CBL_​PRES#
    For the most up to date and detailed description, refer to Section Section 5.3 – Optional Sideband Signal in the PCI Express* Card Electromechanical Specification, Revision 5.0. That document is available from www.pcisig.com.

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  PlushToys on 14/02/2023 - 22:55

  What other options are there? All the ATX 3.0 start around $220.

  • 

    brimmy11 on 14/02/2023 - 23:51

    +1

    If you're spending a minimum of $1500 on a GPU I think spending $200+ on a PSU is reasonable.

    • 

      srhardy on 15/02/2023 - 21:10

      OZB had a 1000w ATX3/PCIE5 for around $219 +P&H
      https://www.ozbargain.com.au/node/756887 EXPIRED ALAS

      Also 1000w would be the bare minimum for the 4090 and probably not enough for the forth coming 4090Ti

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  brimmy11 on 14/02/2023 - 23:49

  Would not buy a Gigabyte PSU.

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    srhardy on 15/02/2023 - 21:12

    shit happens to all brands and it was a while ago so id assume since Ive not been
    deluged with bad news in the interim its about as good as anything else at the moment