New PSU, does it matter if it's ATX 3.0 or 3.1?

[OverDrive]

Hi all,

I am about to rebuild my PC around AM5/9800X3D. I want to upgrade my PSU at the same time. My present PSU is a Seasonic Focus GX Gold 850w.

I would like to go for a 1200w PSU (Gold or Platinum) so that I have overhead for the future.

Does it matter if the PSU is ATX 3.0 or 3.1? My understanding is that the 3.0 uses a 12VHPWR connector on the PSU side and the 3.1 has moved to a 12V-2x6 connector? Does it matter if the PSU has either or non of these connectors? At the moment, I am just using a 12VHPWR adapter that came with my GPU to connect to my PSU. I assume that future NVIDIA GPUs will use 12V-2x6 instead, and adapters will be available?

Any advice or recommendations on the PSU would be appreciated.

Thank you.

 

[OverDrive]

What is your budget? Personally I'd be inclined to keep what you have until you actually need to replace it, because PSUs have gone through quite a few changes lately and need some time to stabilise.

I am happy to spend up to £250 for the PSU as I see it as a long term investment, especially if it's 1200w. Of course, something good qulity at a lower price would also be very welcome.

It's just that I am rebuilding now and would like to wire in the PSU while i'm swapping mobo etc.

I will move my 4090 over, that currently uses a 12VHPWR adapter.

 

[OverDrive]

Thanks for the replies. I may just keep my Seasonic Focus GX Gold 850w until I next upgrade my GPU. According to PCPP my power draw will increase from 679w to 727w when I move to AM5/9800X3D, so still within bounds for my PSU.

I just thought that as I am changing the platform I may as well get all the work done at the same time.

Thinking about the 50xx series, I guess it's hard to know what to expect from rumors. I understand that the expected power draw for the 5090 will go up to 600w. However, needing 2x 12v2x6 seems overkill. I guess it could be possible, especially if AIB manufacturers require more power with their overclocks. I wonder if possible solutions would be to either have: 1x 12v2x6 connector and then 1x 8-pin 150w connector to allow for some extra headroom? Or the card could have 2x 12v2x6, with one being connected directly to a 12v2x6/12VHPWR header and the other using an adapter to connect to one or more of the 8-pin headers? (for PSUs with only one 12v2x6/12VHPWR at least).

I am assuming 12v2x6 is backwards compatible with 12VHPWR headers on the PSU? (only slightly shorter sensing pins).

I have seen some 2x 12v2x6 are already coming to market. This for example:

NZXT ATX 3.1 C1500 80 Plus Platinum 1500W modular Power Supply

Order NZXT ATX 3.1 C1500 80 Plus Platinum 1500W modular Power Supply now online and benefit from fast delivery.

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NZXT C1500 Platinum PSU Review - KitGuru

Today we take a look at a new high end power supply from NZXT, the C1500, which is rated to deliver

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Thank you for suggesting the Antec HCG Pro (Platinum). This looks like an excellent PSU too.