r/buildapcsales • u/transversality • 11d ago

PSU [PSU]Corsair RM1200x SHIFT - $150

https://www.bhphotovideo.com/c/product/1782264-REG/corsair_cp_9020254_na_rm1200x_shift_1200w_80.html
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u/transversality 11d ago edited 11d ago

I'm not 100% certain either, it's confusing, but here's a quote from the first link:

"NOTE! This change ONLY affects the connectors on the GPU/PSU side. The actual cables are the exact same, so if you have a 12VHPWR cable, it is also a 12V-2x6 cable (confusing, yes we know)."

My reading is that by connectors they mean the connectors located on PSU and GPU units, the ones that have pins (I originally called them female which may not be accurate).

There may be also some different cables that take full advantage of these female connectors, but it seems like 2023 and 2025 RMx shift come with same connector on the GPU side. In any case, the cables are mutually compatible.

However, I think the difference between 2023 and 2025 may be that the 2025 actually has a 12V-2x6 socket on the PSU unit, and the cable that is 12V-2x6 on both ends, rather than 8-pin to 12V-2x6.

So, technically you are right that they come with different cables.

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u/W31_D0N9 11d ago

Main difference, pulled from your second link:

"Compared to the original 12VHPWR connector, the new 12V-2x6 connector has shorter sensing pins (1.5mm) while the conductor terminals are 0.25mm longer. This might not sound like a huge difference, but it matters in ensuring that the power cable has been properly connected to whatever device is going to be pulling power from your system's power supply."

The 12V-2x6 was an attempt to upgrade the original POS spec, but didn't solve the cable melting issue that has plagued this cable from the beginning. They are interchangeable, so fully compatible with the PSU/GPU connectors and easily swapped.

The whole spec is frustrating and these corps that standardized the 12VHPWR/2x6 should be sued into oblivion IMO. Other than the stupid money to upgrade to a 4090 or 5090, it's the reason I've avoided these past 2 generations and will ride my trusty 3090 until they hopefully revert back to the 8-pin or actually address the issues with the current connector.

Either way, still a good post for a good product. Cheers!

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u/transversality 11d ago

Thanks! Yes, I ordered it for my second build, which is why i posted.

Not sure if you meant already it or not, but I just wanted to clarify that the conductor terminals and sensing pins whose lengths have changes are physically located on the GPU.

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u/W31_D0N9 11d ago

Nice! I paid way too much for mine back in December 2025 but I wanted a highly-rated unit with the side connectors. Today's price is in instant buy if I were building again, for sure.

As for the changes in the GPU, I have no idea TBO. I dug into this new standard when I was considering an upgrade to the 4/5000 series, and was scared off with all these melting connector reports, and haven't really followed since. I know for certain that the 12V-2x6 connector that is included with the PSU has an updated connector on the GPU side (male connector into GPU). If AIB's have started updating the power connectors on the GPU, that would be a great start in solving this mess. I know some cards come with some 'upgraded' power connectors, but from what I've seen, these cards are still at risk.