I'm thinking about upgrading my GPU to the RX 9070 XT for 4K gaming, but I have some concerns about my current PSU setup. I've got a Ryzen 7 3700X, 32GB DDR4 RAM, and I'm currently using an RX 6700 along with a Gigabyte P750GM 750W PSU. The RX 9070 XT I'm getting requires 3x 8-pin power connectors, but my PSU only has 4x 8-pin connectors spread across 2 rails. This means I'd need to draw multiple 8-pin connectors from the same rail, and I've read that under load it could approach around 450W. I'm wondering if this setup is safe, especially regarding rail distribution and potential power spikes. Would limiting power or undervolting help? Should I opt for a different model with only 2x 8-pin connectors instead?
3 Answers
Just because it uses 3 8-pins doesn't mean it draws 450W. The 9070 XT actually runs a bit over 300W. If your PSU is rated well, you should be fine. Running it above 20% load is typical and expected. But yeah, just be aware that some models of that PSU have a bit of a questionable reputation.
I've had the same setup for a month now without issues. I have a PSU similar to yours, and I connect the 3 power connectors using two cables. As long as your PSU is decent, it should handle this fine!
It sounds like you're overthinking this. Your setup won't push your 750W PSU hard at all—likely around 400-450W max, and it won't stay there constantly. The 3x 8-pin connectors are really just for better distribution and maybe overclocking, not because it’s always pulling that much power!
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