Recommended power supply
What PSU does the RTX 4090 need?
The RTX 4090 needs a 750W power supply (with headroom). See live used prices across 7 eBay markets.
✓ 750W PSU recommended
Power requirement
Spec
RTX 4090Power draw
450W
Live prices
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Common questions
A 750W PSU is recommended for a typical build using the RTX 4090 (which draws about 450W), leaving ~30% headroom for the CPU and other components.