I attempted to upgrade my PSU and GPU simultaneously, but the power button is unresponsive.
I attempted to upgrade my PSU and GPU simultaneously, but the power button is unresponsive.
Hello there, it's been a long time since I've shared here.
In short, I was planning to upgrade from a 3060 and 650w PSU to an RX9070XT and an 850w PSU. I attempted the changes at the same time.
With the 850w connected, I have the 8 pin CPU, 24 pin motherboard, and 8x3 pin PCIe in the 9070. Pressing the power button or shorting the power pins didn't make a difference.
Later, I reinserted the old 650w into the 8 pin CPU and 24 pin motherboard, connected the fan power to the SATA/PATA, and shorted the power—this started the fans! I'm not sure if it's been posted yet, but that's not crucial right now.
Where might I have made a mistake? It's been about 4-5 years since I last tried an upgrade.
Edit: The new PSU is fully modular, while the old 650w was only partially modular with the 8pin CPU and 24pin motherboard being hard wired. I've connected the fan molexes to the SATA/PATA part of the modular unit.
The old PSU is a Corsair CX650M, and the new 850w is a Corsair RM850X.
Please let me know if there are any other details that could help.
i'm beginning to suspect i just received a faulty power supply unit since it starts up each time i short with the previous one but not with the new one.
Is your setup using an outdated setup? Corsair removed the -12V pin from the 24-pin connector in newer power supplies, which might lead to problems if you're connecting it to older devices.
It's possible the issue lies with your setup, as it isn't old but predates the new ATX spec that made it optional. I understand your point about the PSU being the main concern, though replacing it might not solve the problem entirely. You may want to verify if your model lacks the -12V pin (second pin top row from left with the clip facing up) and consider purchasing a different brand PSU, as Corsair seems to be the only one mentioned for removal on mainstream models.
I no longer purchase Corsair PSUs since they removed -12V support. When upgrading a 2021 TX850M, I opted for an MSI A1000G that offered genuine -12V compatibility. It's wiser to be cautious. Saving a bit on each PSU has cost me my preference, though it's not a major issue for me. I'm only one user, but I no longer automatically suggest Corsair to others because it's hard to confirm if a motherboard requires -12V.
I understand that -12V isn't required in ATX 3.x systems, which explains Corsair's push to limit sales and save on parts. A more sustainable approach would be better, but some PCs still face compatibility problems.
I could revisit Corsair if they provide a clear list of incompatible models on their site that don’t work with their products. The challenge is that this might deter potential buyers and reduce sales.
Over the years, I've assembled at least ten PCs using Corsair components and have swapped PSUs between systems. Given the compatibility concerns, it's time to explore another brand. Goodbye, Corsair.
Great ideas, thanks a lot! I’ll look into compatibility and consider swapping this rm850 for a Stryker model if necessary. Your suggestions are really helpful!