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Hi Drifty, Per NVIDIA's recommendation, 750W should be sufficient for the RTX 3090 FE. However, if you plan on overclocking your CPU/GPU, then 850W would be recommended. If you have any additional questions, we'd be happy to help: support.corsair.com -Albert
Sorry, there was a problem. Please try again later.You should be fine running this power supply as long as you aren’t over clocking anything.
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