What PSU do you need for a NVIDIA GeForce RTX 5090?
The NVIDIA GeForce RTX 5090 has a vendor-published board power (TGP/TBP) of about 575 W. Sizing a power supply from that figure and a typical companion system (a 125 W-class CPU plus standard ATX accessories, ~242 W), here is what we recommend.
Recommendations are planning estimates, not electrical or purchasing advice. The hardware figures behind them are vendor-published; your exact board-partner model and build can still differ.
Recommended (comfortable)
1200 W
Standard headroom for transient spikes and a little future room.
Minimum
1000 W
Smallest quality PSU tier we would pair with this card in a typical build.
GPU board power
575 W
Vendor TGP/TBP — a conservative ceiling, not typical gaming draw.
Vendor-recommended PSU
1000 W
The wattage the GPU vendor lists — deliberately conservative.
Power connector
1× 16-pin 12V-2x6 (12VHPWR-compatible). Use native PSU cables and confirm the layout on your exact board-partner model. See connector & ATX 3.x details →
Why 1200 W for this card
The NVIDIA GeForce RTX 5090's draw is not flat. Brief spikes above the rated board power are normal, and they are short enough that a wall meter never shows them — but a power supply sitting close to its limit can trip on one. That is what the headroom in these figures is for: 575 W is the sustained ceiling, not the worst instant. Because this card feeds from a 16-pin 12V-2x6 socket, prefer a supply with a native 12V-2x6 cable rather than an adapter bundle — ATX 3.x units ship one, and it removes a join from the highest-current path on the card. At 575 W an ATX 3.1 (or 3.0) unit is worth insisting on — the specification requires supplies to ride out short excursions well above their continuous rating, which is exactly the behaviour a card in this class provokes. We do not publish a spike figure for the NVIDIA GeForce RTX 5090 because the manufacturer does not publish one.
On the recommended 1200 W supply, a Ryzen 7 9800X3D paired with the NVIDIA GeForce RTX 5090 draws roughly 854 W under load — about 71% of the unit's rating. The 80 PLUS programme certifies efficiency at 20%, 50% and 100% load, and units are typically at their best around the middle of that range, so this sits in a sensible place: enough margin for transients without paying for capacity that never gets used.
The manufacturer recommends 1000 W; our comfortable figure is 1200 W, 200 W higher. Vendor recommendations assume a mainstream companion system, while our figure adds standard headroom on top of a typical build. 1000 W is not wrong — but if you are running a power-hungry CPU or want the supply loafing rather than working, the larger unit is the safer buy.
Pairing this card with different CPUs
The CPU does change the answer here. With a Ryzen 5 7600 this build sits on a 1000 W supply, but moving to a Ryzen 7 9800X3D (162 W peak) pushes the estimate to 1200 W. If you are pairing this GPU with a high-power CPU, budget for the larger unit.
| CPU | CPU peak | System load | Recommended PSU |
|---|---|---|---|
| Ryzen 5 7600 | 88 W | 780 W | 1000 W |
| Ryzen 7 9800X3D | 162 W | 854 W | 1200 W |
| Core i9-14900K | 253 W | 945 W | 1200 W |
Other popular choices map onto this table rather than changing it: the Ryzen 7 7800X3D has the same 162 W peak as the Ryzen 7 9800X3D, so that row applies to it unchanged; a Core i5-14600K (181 W peak) lands on the same 1200 W tier as the Ryzen 7 9800X3D; a Ryzen 9 9950X (230 W peak) lands on the same 1200 W tier as the Ryzen 7 9800X3D.
Assumes an ATX board, 2 RAM sticks, 1 SSD, 3 fans and a USB allowance, at the standard headroom profile. Change any of it in the calculator.
Cabling this card
This card uses the 16-pin 12V-2x6 connector. NVIDIA's own instruction is to ensure the plug is fully inserted and seated flush against the receptacle — a partially seated 16-pin plug is the failure this connector is known for, and it fails under exactly the sustained 575 W load this card produces. Route the cable so nothing forces it sideways at the plug, and prefer a native cable from an ATX 3.x supply over an adapter chain.
600 W-class 16-pin input. Partner OC cards can draw more than reference. Factory-overclocked cards from board partners can also carry a higher power limit than the reference design, so if your card advertises an OC BIOS, treat the figures here as the floor rather than the ceiling.
Want a number for your exact CPU and parts? Open the full PSU Calculator with this GPU pre-selected →
The standards behind these numbers
- How much PSU headroom do you actually need?
Why the recommendation above sits above the 575 W board power rather than on it.
- 12VHPWR vs 12V-2x6: what actually changed
What the revised 16-pin socket on this card does when a plug is not fully seated.
- ATX 3.0 vs ATX 3.1: do you need a new PSU?
Whether an existing ATX 3.0 supply is a problem for a card in this power class.
Board-power source: NVIDIA official specification page (AI-assisted verification, 2026-07-08). Last updated: 2026-07-08.
Frequently asked questions
What size PSU do I need for a NVIDIA GeForce RTX 5090?
For a typical build that pairs the NVIDIA GeForce RTX 5090 (about 575 W board power) with a 125 W-class CPU and standard accessories, plan for at least a 1000 W power supply. A 1200 W unit gives comfortable headroom for transient spikes and future upgrades. These are estimates — verify against your exact parts.
How much power does the NVIDIA GeForce RTX 5090 draw?
Its vendor-published board power (TGP/TBP) is about 575 W. That is a conservative ceiling used for PSU sizing, not the typical draw you would see while gaming.
Is a 1000 W PSU enough for a NVIDIA GeForce RTX 5090?
NVIDIA GeForce RTX 5090's manufacturer lists a 1000 W PSU recommendation. That figure is deliberately conservative to cover weaker units and power-hungry CPUs, so a quality 1000 W supply is a safe choice. Our own estimate for a typical build is a 1000 W minimum and 1200 W for comfort.
Does the CPU change what PSU the NVIDIA GeForce RTX 5090 needs?
Yes. With a Ryzen 5 7600 the estimate is 1000 W, while a Core i9-14900K (253 W peak) takes it to 1200 W.
Why does this differ from NVIDIA GeForce RTX 5090's official PSU recommendation?
The manufacturer lists 1000 W and our comfortable figure is 1200 W. Vendor guidance assumes a mainstream companion system; ours adds standard headroom to a typical build. Both are shown on this page so you can judge.