ATX3.0 PSUs

Big_Rich

Silver Level Poster
When will I be able to spec a system with an ATX3.0 PSU? I want to spec a 7950X3D + RTX4090 system, but I'm not willing to compromise with adapter cables and out-dated power supplies.
 

SpyderTracks

We love you Ukraine
When will I be able to spec a system with an ATX3.0 PSU? I want to spec a 7950X3D + RTX4090 system, but I'm not willing to compromise with adapter cables and out-dated power supplies.
It's not something we can answer, none of us work for PCS and they don't monitor the forums. Next to give them a call or email [email protected]

But current PSUs are absolutely fine so long as you account for transient spikes which we always would
 

Big_Rich

Silver Level Poster
I realise older PSUs can be made to work adequately, but something just doesn't sit right with me spending 3500-4000 on a PCIe 5.0 ATX3.0 system and having to half-arse it with a 12+4 adapter because my brand new PSU is actually "old".
 

SpyderTracks

We love you Ukraine
I realise older PSUs can be made to work adequately, but something just doesn't sit right with me spending 3500-4000 on a PCIe 5.0 ATX3.0 system and having to half-arse it with a 12+4 adapter because my brand new PSU is actually "old".
Corsair supply NVidia cables btw, you don't need an adapter, but you have to purchase it separately


They're freely available most places like amazon
 

Scott

Behold The Ford Mondeo
Moderator
I think there's a gap here that Corsair are causing. Don't take any of this as gospel, it's just how I personally see things.

I believe PCS have a partnership with Corsair, if you notice that almost all PSUs provided by PCS are Corsair. The only ATX3.0 variant available from Corsair at the moment is the Shift line. These PSUs look great but are very case and layout dependent so they couldn't easily be added into the configurator. The logic gates required would make it a mess.

I enquired with Corsair about ATX3.0 PSUs that weren't the shift variety and they declined to give me any information on future products.

The end result means that until Corsair release some conventional ATX3.0 PSUs I don't think we will see them available with PCS, unless there's a dramatic shift in supplier. The good news is that as soon as they are available, they will be released with PCS as well.

On the flip side of the coin, if Corsair aren't too fussed about the need to switch to ATX3.0, I wouldn't be overly fussed as a consumer. I was in the same mindset though, hence why I switched allegiance in my most recent PSU purchase.
 

Scott

Behold The Ford Mondeo
Moderator
I've just been reading that the 2023 RMe V2 models are ATX3.0.

That's good news and should hopefully filter through to PCS soon.
 

Big_Rich

Silver Level Poster
I've just been reading that the 2023 RMe V2 models are ATX3.0.

That's good news and should hopefully filter through to PCS soon.
I shall hold on to my wallet then :D(y)
They work more than adequately....my 4090 attached to an "old" 1200w HX quite happily runs 4k120 at 95% usage with no issues at all

I want something beyond "more than adequate" for a nearly 4 grand system. I'm not buying in to something that is already technically obsolete, whther it works or not. Got burned like that with Kaby Lake. Never again.
 

Scott

Behold The Ford Mondeo
Moderator
If the pics I'm seeing are right they don't have the 12vhpwr connections, but come with a 2x 8 pin connector instead.

I would get in touch with PCS and see what they say about them.
 

Big_Rich

Silver Level Poster
If the pics I'm seeing are right they don't have the 12vhpwr connections, but come with a 2x 8 pin connector instead.

I would get in touch with PCS and see what they say about them.
Yes, that is correct. Non ATX 3.0 PSUs don't have the 12VHPWR socket, although as has been noted, Corsair do an adapter cable for their older PSUs, power delivery isn't an issue, and the RTX4090 is fine using it.

PCS' response was this...

"Thank you for your email, I understand your concerns regarding the power supply.

The only real addition or generational change is the native 12+4 power support, most of the overall power design and components remain the same. In our view, this doesn't make previous specification power supplies obsolete.

We will be transitioning over to the ATX 3.0 standard, but this will happen slowly and we will introduce it one power supply at a time, this is due to the mass supply of current generation power supplies still in surplus stock.

My purchasing team have advised that Corsair HX and RMx units will be the first replaced and I see a Corsair 1200W RMx SHIFT unit on our stock list, it is yet to be ordered and supplied to us.

I can't tell you exactly when we will have these units available, but we will transition within the next couple of months. If you wish to order a power supply specifically for your order, we can assist you with this."


My issue is that down the line, after spending the best part of 4 grand on a system now, something will come out that requires ATX 3.0 spec compliance beyond just power delivery... for example a mystical future GPU that can't operate without seeing the four sense pins of a fully ATX 3.0 compliant 12VHPWR connector.

I'm aware there's no such thing as futureproofing, and as soon as you buy something, its replacement is already in the pipeline, but buying something that has already been superseded for over a year just doesn't make financial sense to me... especially not at the high end. Like I mentioned, I got burned with Kaby Lake.
 

Scott

Behold The Ford Mondeo
Moderator
Yes, that is correct. Non ATX 3.0 PSUs don't have the 12VHPWR socket, although as has been noted, Corsair do an adapter cable for their older PSUs, power delivery isn't an issue, and the RTX4090 is fine using it.
I think you're misunderstanding what I wrote. The Corsair atx3.0 V2 doesn't appear to have the 12VHPWR plug either.

It's either a mistake in the config or they've omitted it in their first attempt.
 

SpyderTracks

We love you Ukraine
I think you're misunderstanding what I wrote. The Corsair atx3.0 V2 doesn't appear to have the 12VHPWR plug either.

It's either a mistake in the config or they've omitted it in their first attempt.
According to resellers, they don't ship with the 12VHPWR connector either


I think Corsair are leaving it as a modular extra for now, likely until AMD adopt it as well perhaps?

Does seem a bit of a mis-step IMHO, considering the cost of these ATX3 PSU's, you would have thought they could throw in a £10 cable
 

Scott

Behold The Ford Mondeo
Moderator
According to resellers, they don't ship with the 12VHPWR connector either


I think Corsair are leaving it as a modular extra for now, likely until AMD adopt it as well perhaps?

Does seem a bit of a mis-step IMHO, considering the cost of these ATX3 PSU's, you would have thought they could throw in a £10 cable
That's not too much of a surprise as the Nvidia cards tend to ship with the adapters. Not sure if other AIB partners do though.

I'm genuinely surprised that they aren't adopting the standard in the power chassis itself. The only thing I can think of is they are trying to get rid of current stock, and adapting the hardware they have to suit the new standards where required, without adding anything new into the mix. Pretty poor show if that is the case. They're products are excellent but that's very anti-consumer to me.
 

SpyderTracks

We love you Ukraine
That's not too much of a surprise as the Nvidia cards tend to ship with the adapters. Not sure if other AIB partners do though.

I'm genuinely surprised that they aren't adopting the standard in the power chassis itself. The only thing I can think of is they are trying to get rid of current stock, and adapting the hardware they have to suit the new standards where required, without adding anything new into the mix. Pretty poor show if that is the case. They're products are excellent but that's very anti-consumer to me.
My personal favorites for PSU's are Seasonics, and their Vertex ATX3 series ship with the 12VHPWR cables as standard, and the PSU actually has a dedicated port for it, it's not as if it's multi 8pins from the PSU, it's a full dedicated port.

 

Scott

Behold The Ford Mondeo
Moderator
I just did some reading around as it's been annoying me a little. I think I may have been doing Corsair an injustice.

There are a number of ATX3.0 PCIe 5 PSUs on the market without the 12V connector. Now, again, I can't find anything to back this up but the lack of information is making my spidey sense tingle. I think there's actually a nervousness around this connection when used to draw 600w. I read a blog/article/post from someone who seemed very well knowledged in the subject and they weren't at all comfortable with using the 12v connector at the PSU end, only at the GPU end, as the resistance loads and temperatures can be quite extreme. The specification of the connectors and cable is very stringent, and there have already been known issues with the 4090 using the straight pass through cable (melting at the GPU end).

So, I think that it's possible Corsair simply aren't comfortable with the connector... not enough to put it into use on their PSUs. They still meet the ATX3.0 and PCIE5 standard, as they are 12VHPWR compliant through the PSU to the adapter.

The article I read if you fancy a nosey http://jongerow.com/12VHPWR/
 

SpyderTracks

We love you Ukraine
I just did some reading around as it's been annoying me a little. I think I may have been doing Corsair an injustice.

There are a number of ATX3.0 PCIe 5 PSUs on the market without the 12V connector. Now, again, I can't find anything to back this up but the lack of information is making my spidey sense tingle. I think there's actually a nervousness around this connection when used to draw 600w. I read a blog/article/post from someone who seemed very well knowledged in the subject and they weren't at all comfortable with using the 12v connector at the PSU end, only at the GPU end, as the resistance loads and temperatures can be quite extreme. The specification of the connectors and cable is very stringent, and there have already been known issues with the 4090 using the straight pass through cable (melting at the GPU end).

So, I think that it's possible Corsair simply aren't comfortable with the connector... not enough to put it into use on their PSUs. They still meet the ATX3.0 and PCIE5 standard, as they are 12VHPWR compliant through the PSU to the adapter.

The article I read if you fancy a nosey http://jongerow.com/12VHPWR/
I just had a nose through, but that's a really good article by someone who knows their stuff.

If there is an issue with the native 12VHPWR in ATX3 designs, then reports will come in fairly quickly I would imagine. As you say, perhaps Corsair are holding off out of caution to see how others fare.

It also appears that to properly accomodate this connector means HAVING to constuct the PSU at a much higher build quality with far higher copper density in the PCB and higher guage wiring than we're used to with ATX2, so perhaps in the long term it will only be the premium ranges that actually adopt the connector natively at the PSU side, and regular models maintain the standard 8pin PCIe connectors at the PSU side to better distribute the power load on "cheaper" designs, cheaper not really being fair, just not as high end as we're currently used to.
 

Big_Rich

Silver Level Poster
My personal favorites for PSU's are Seasonics, and their Vertex ATX3 series ship with the 12VHPWR cables as standard, and the PSU actually has a dedicated port for it, it's not as if it's multi 8pins from the PSU, it's a full dedicated port.

This is exactly what I want for my build. A proper ATX 3.0 compliant PSU, with a dedicated 12VHPWR socket, and proper 12VHPWR cable (not an adapter).

IMHO, this is what PCS should be supplying in a near 4 grand 7950X3D + RTX4090 build.
 

Scott

Behold The Ford Mondeo
Moderator
This is exactly what I want for my build. A proper ATX 3.0 compliant PSU, with a dedicated 12VHPWR socket, and proper 12VHPWR cable (not an adapter).

IMHO, this is what PCS should be supplying in a near 4 grand 7950X3D + RTX4090 build.

They supply what they are able to provide from their chosen suppliers. That's just the way this world works unfortunately. You are free to shop around and spend the £4k with any system integrator that you see fit to use, as anyone is. How much you are spending has no bearing on PCSs business model or contract obligations.
 

Scott

Behold The Ford Mondeo
Moderator
I do wonder if it's a Corsair side reason rather than PCS....having just looked at 3 other custom UK builders (big companies) and none of them are offering these PSUs on their cofnigurators

It definitely is, but I think there's more to it as there are a number of PSU manufacturers dragging their heels with the change. Only the premium, premium, lines tend to be getting the update..... and that's likely consumer driven rather than standard technological advancement.

I think there is apprehension with the 600w interface. With 10yr warranties involved it's a long time to stand by a product if you aren't happy with it.
 

Big_Rich

Silver Level Poster
3 months after I posted this, still no ATX3.0 PSUs and now you can't spec 6000MHz RAM with Ryzen builds anymore. :rolleyes:
 

TonyCarter

VALUED CONTRIBUTOR
The 6000MHz RAM was pulled months ago due to poor power controls in the AGESA code (and the instructions to MB partners) causing system instability & failures in testing.

The latest beta microcode/BIOS seems to have finally fixed that, so 6000MHz and higher may be on the configurators again soon.

Our advice for people who really want fast RAM, was to but the bare minimum (8GB of 4800MHz) from PCS in the build, and swap out for your own 6000MHz+ RAM...but run it at <5600MHz until the microcode/BIOS is stable / out of beta.
 
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