What PSU do I need for a GeForce RTX 4070?

650 W to 650 W, depending on the processor beside it. With a Ryzen 7 7800X3D the answer is 650 W.

Where the watts go — Ryzen 7 7800X3D with GeForce RTX 4070

Power draw by component for a GeForce RTX 4070 build
Component	Power
Ryzen 7 7800X3D at its ceiling	162 W
GeForce RTX 4070 board power	200 W
Motherboard	25 W
Memory module x2	6 W
NVMe SSD	7 W
Case fan x3	6 W
Continuous draw	406 W

The recommendation of 650 W sits that draw at 62% of the supply's rating. The target is 80%: supplies lose capacity as they age, and a graphics card's millisecond transients have to come from somewhere.

Why the answer is a range

A GeForce RTX 4070 is rated at 200 W of board power, and NVIDIA recommends a 650 W supply for it. That single figure has to cover every processor anyone might pair with the card, which is why the honest answer depends on yours: across the 26 processors here this card needs anywhere from 650 W to 650 W.

With a Ryzen 7 7800X3D the whole system draws 406 W at once — 200 W for the card, 162 W for the processor at its power ceiling, and 44 W for the board, memory, drives and fans. That calls for 650 W, leaving the supply at 62% of its rating rather than sitting on top of it.

GeForce RTX 4070 with every processor

Power supply needed for a GeForce RTX 4070 with each processor
Processor	System draw	PSU needed	Set by
Core i7-13700K	497 W	650 W	Both agree
Core i9-13900K	497 W	650 W	Both agree
Core i7-14700K	497 W	650 W	Both agree
Core i9-14900K	497 W	650 W	Both agree
Core Ultra 7 265K	494 W	650 W	Both agree
Core Ultra 9 285K	494 W	650 W	Both agree
Ryzen 9 9950X	474 W	650 W	Card maker
Ryzen 9 9950X3D	474 W	650 W	Card maker
Ryzen 9 7900X	474 W	650 W	Card maker
Ryzen 9 7950X	474 W	650 W	Card maker
Core i5-13600K	425 W	650 W	Card maker
Core i5-14600K	425 W	650 W	Card maker
Ryzen 7 9800X3D	406 W	650 W	Card maker
Ryzen 9 9900X	406 W	650 W	Card maker
Ryzen 7 7800X3D	406 W	650 W	Card maker
Ryzen 9 7950X3D	406 W	650 W	Card maker
Core Ultra 5 245K	403 W	650 W	Card maker
Ryzen 5 7600X	386 W	650 W	Card maker
Ryzen 7 7700X	386 W	650 W	Card maker
Ryzen 7 5800X3D	386 W	650 W	Card maker
Ryzen 9 5950X	386 W	650 W	Card maker
Core i5-12400F	361 W	650 W	Card maker
Ryzen 5 9600X	332 W	650 W	Card maker
Ryzen 7 9700X	332 W	650 W	Card maker
Ryzen 5 7600	332 W	650 W	Card maker
Ryzen 5 5600X	332 W	650 W	Card maker

Frequently asked questions

What PSU do I need for a GeForce RTX 4070?

Between 650 W and 650 W depending on the processor. With a Ryzen 7 7800X3D the answer is 650 W: the system draws 406 W at full load, and that leaves the supply at 62% of its rating.

How many watts does a GeForce RTX 4070 use?

200 W of total board power under load. That is the card alone — a complete system adds the processor's ceiling and roughly 44 W for the motherboard, memory, drives and fans.

NVIDIA recommends 650 W. Why does this page sometimes say more?

Because a card maker publishes one figure per card and it has to work with any processor. On this card no processor here pushes past it. Where the build needs less, the recommendation stays at the vendor's number.

Is a 650 W PSU enough for a GeForce RTX 4070?

Yes, for every processor in this table. It is NVIDIA's own recommendation and no pairing here exceeds it.

A sizing estimate, not a measurement. It adds the processor's power ceiling, the graphics card's rated board power and an itemised allowance for the rest of the system, then leaves headroom so the supply is not running at its limit. Real draw depends on the board's power profile, how far the parts are overclocked, and how a particular graphics card handles transient spikes. Treat a result within 50 W of a supply's rating as a reason to choose the next size up.

Data on this page last verified 2 September 2026.