GeForce RTX 40 · Ada Lovelace · data reviewed 2026-11-10
What PSU for the GeForce RTX 4070 SUPER?
With a Ryzen 7 9800X3D, two DDR5 sticks, one NVMe drive, and three fans, WattWise estimates 397 W continuous while gaming. The minimum size is 500 W. The efficiency size is 850 W.NVIDIA's published system minimum is 650 W.
These open a store search for that wattage class. Prices stay on the store. Disclaimer.
Three CPU pairings
Same platform each time: two memory modules of the CPU's generation, one NVMe drive, three fans, no pump. Gaming uses the CPU's base power. The ceiling puts the CPU on its package limit and the GPU on rated board power.
| CPU | Gaming load | Minimum | Efficiency size | Both at the limit |
|---|---|---|---|---|
| Ryzen 5 9600X a 65 W six-core gaming CPU | 342 W | 450 W | 700 W | 365 W · 500 W |
| Ryzen 7 9800X3D the current 120 W gaming CPU most builds are compared against | 397 W | 500 W | 850 W | 439 W · 550 W |
| Ryzen 9 9950X a 170 W sixteen-core CPU at its stock 200 W package limit when both are maxed | 447 W | 600 W | 1,000 W | 477 W · 600 W |
Connectors and spikes
12 GB GDDR6X. Total Graphics Power: 220 W, from the vendor. These figures are the reference design. A partner card can raise the power limit and change the plug.
GeForce RTX 4070 SUPER is rated 220 W. 1× 300W or greater PCIe Gen 5 (12VHPWR) cable, or 2× 8-pin. Some partner cards use 1× 8-pin.. The connector budget covers the rated board power.
Do not add a second copy of the board power for spikes. Intel ATX design guide 336521, updated for PCIe CEM 5.1, requires a PSU above 450 W with a 12V-2x6 connector to hold 200% of its label for 100 µs, 180% for 1 ms, 160% for 10 ms, and 120% for 100 ms, at the duty cycles in that table. A card above 75 W may reach 3× sustained power for 100 µs or less. Use a native 12VHPWR cable rated at least 300 W and seat it fully. Sense pins advertise 150, 300, 450, or 600 W.
The vendor does not publish a separate in-game average. The gaming estimate uses rated board power.
NVIDIA's required system power is a minimum for a PC configured with a Ryzen 9 5900X. Power requirements can differ with the rest of the system.
Questions this card actually raises
What PSU do I need for a GeForce RTX 4070 SUPER with a Ryzen 7 9800X3D?
With 2× DDR5, one NVMe drive, and three fans, WattWise estimates 397 W continuous while gaming. The minimum size for that estimate is 500 W. The efficiency size, near 50% load, is 850 W. If the CPU and GPU both hit their power limits together, the load is 439 W and the minimum size is 550 W.
Which power connectors does the GeForce RTX 4070 SUPER reference design use?
1× 300W or greater PCIe Gen 5 (12VHPWR) cable, or 2× 8-pin. Some partner cards use 1× 8-pin.. GeForce RTX 4070 SUPER is rated 220 W. 1× 300W or greater PCIe Gen 5 (12VHPWR) cable, or 2× 8-pin. Some partner cards use 1× 8-pin.. The connector budget covers the rated board power.
Why is the vendor PSU number different from WattWise for the GeForce RTX 4070 SUPER?
NVIDIA publishes a system minimum of 650 W. NVIDIA's required system power is a minimum for a PC configured with a Ryzen 9 5900X. Power requirements can differ with the rest of the system.
Do transient spikes mean I should double the PSU for a GeForce RTX 4070 SUPER?
Do not add a second copy of the board power for spikes. Intel ATX design guide 336521, updated for PCIe CEM 5.1, requires a PSU above 450 W with a 12V-2x6 connector to hold 200% of its label for 100 µs, 180% for 1 ms, 160% for 10 ms, and 120% for 100 ms, at the duty cycles in that table. A card above 75 W may reach 3× sustained power for 100 µs or less. Use a native 12VHPWR cable rated at least 300 W and seat it fully. Sense pins advertise 150, 300, 450, or 600 W.
Sources
Nearby cards
- GeForce RTX 4070 Ti — 285 W total graphics power
- GeForce RTX 4070 — 200 W total graphics power