Question I can't understand Seasonic's PSU cable compatibility chart, want to swap PSUs

[Cyber_Akuma]

I am having trouble figuring out Seasonic's Cable Compatibility chart listed here: https://seasonic.com/cable-compatibility#

I have two PSUs, a Seasonic PRIME 750 Platinum SSR-750PD2 which was purchased in 2019 here:
https://www.amazon.com/gp/product/B075M4SJL6/

And a Seasonic FOCUS GX-750 SSR-750FX that was purchased in 2021 here:
https://www.bestbuy.com/site/season...-10-yr-warranty-black/6414263.p?skuId=6414263

I don't understand which ones are which in this compatibility chart. Is this chart saying that the Prime 750 Platinum uses special cables for the 24 pin, 8-pin CPU and 6+2 pin PCIe with capacitors in them that are not compatible with newer models? Or can the cables for the Prime Platinum work on the GX-750 but not the other way around?

Basically, I want to test if my friend's PC (the one with the Prime 750 from 2019) has been having issue lately due to a possibly failing PSU, and I have an older system that I just replaced the PSU on (The FOCUS FX-750 from 2021) that I could use to test. Some of the wiring though was a HUGE pain to do on said system though and I really REALLY don't want to have to un-do and then re-do it if I can avoid it. Would I be able to take out the PRIME 750 and put the FOCUS GX-750 in it's place without having to re-do the cabling? It's not clear if that chart is saying yes or no, or if the capacitor thing is even required or just simply recommended, and if so if you can use the capacitor cables on a non-capacitor PSU or vice-versa (the model numbers for the cables all being the same in that chart doesn't help matters...)

 

[JohnBonhamsGhost]

I don't understand which ones are which in this compatibility chart.

contact Seasonic support directly and get a definitive answer rather than what some member here may believe, which could possibly lead to damaged components.

 

[Ralston18]

Consider testing (if I have followed correctly) that Prime 750.

https://www.lifewire.com/how-to-manually-test-a-power-supply-with-a-multimeter-2626158

Not a full test because the PSU is not under load.

However, any voltages out of tolerance would make that Prime 750 PSU a poor choice to swap in and not worth the all of the re-wiring etc..

 

[Cyber_Akuma]

I have a PSU tester I can use actually, and I used it before I ever installed that PSU. Mind you, that PSU that I want to temporarily swap in is less than a year old.

Also, Seasonic got back to me and confirmed that they can be swapped:

Thank you for contacting Seasonic.

If you have a SSR-750PD2, you have a PRIME Ultra so with black and flat cables. Not the previous model PRIME 750 Platinum (SSR-750PD) that had inline capacitors on the cables.
From there, if both of your PSU's got black and flat cables, you can interchange the PSU without changing cables. These cables are the same so fully compatible.
If you have a PRIME with round, braided cables with inline capacitor, we recommend to change the ATX 24 pin, CPU and PCIe cables as FOCUS GX does not need them.

Thank You for your reply.

I am not sure which cables they are, as they appear similar to me. There is no model number on the PSU itself to indicate if it's the PD or PD2. I have taken photos of the cables if that helps.

These are the ATX 24, CPU 8-pin and PSU-side of the cables on the Prime Platinum from 2019:

https://imgur.com/a/Cm9iQ7W

View: https://imgur.com/a/Cm9iQ7W


And these are the ATX 24, CPU 8-pin and PSU-side of the cables on the FOCUS Gold from 2021:

https://imgur.com/a/epsKR1V

View: https://imgur.com/a/epsKR1V


Are these the same flat cables you mentioned? Or does the top set have the inline capacitors? Would it cause damage or problems if I plugged the Focus Gold that I know does not have inline capacitors on it's cables into the Prime Platinum's cables if these are the inline capacitor type? The cables were quite difficult to route in these cases and I wanted to temporarily swap the Prime Platinum with the Focus Gold to ensure that the system problems I am having are not due to a faulty power supply, so if it's possible to do this without having to undo and redo all the cabling I would prefer to go that route if I can.

Thank you for your reply.

These are cables from a PRIME Ultra 750 Platinum (SSR-750PD²- you can confirm this model by checking the rating label of the PSU) which are black and flat except for the ATX 24 pin. So basically, same as your FOCUS GX so nothing to exchange for cables, simply swap the PSU and you are good to go.

Thank you.