What PSU do you need for an RTX 5090?
Paired with a Core i9-13900K / 14900K, this build draws about 960W at peak (575W GPU + 295W CPU + system). A 1600W unit runs it at ~60% load. Absolute minimum: 1200W.
| GPU RTX 5090 | 575W |
| CPU Core i9-13900K / 14900K | 295W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 960W |
⚡ The RTX 5090 uses a 12V-2x6 (12VHPWR) connector — choose an ATX 3.1 PSU with a native cable.
→ Adjust for your exact buildRecommended power supplies
GamerKit may earn a commission from links on this page — at no extra cost to you. We only list gear we'd actually recommend for the spec.
FAQ
Is a 1200W PSU enough for an RTX 5090?
It's the bare minimum, but we'd recommend 1600W. This build peaks around 960W, and a 1600W unit keeps it near 55% load — the efficiency sweet spot — with headroom for the GPU's transient spikes.
What efficiency rating should I get for an RTX 5090?
80+ Gold or Platinum. It's the best balance of price and efficiency for a build this size. Never pair a good GPU with a cheap unrated PSU.
Does the RTX 5090 need a 12VHPWR cable?
Yes — get an ATX 3.0/3.1 PSU with a native 12V-2x6 connector rather than using the pigtail adapter that ships with the card.