GUIDE
Is 650W enough for an RTX 5070?
Yes, with most mid-range CPUs. Step up to 750W for an X3D Ryzen, a Ryzen 9 or an i5 K-series, and 850W for an i7/i9 K-series or Core Ultra 7/9.
Nvidia's official minimum for the RTX 5070 is 650W, based on a test PC with a Ryzen 9 9950X. The card itself is rated at 250W. Whether 650W is comfortable depends on your CPU.
The math for common pairings
These use the same method as the calculator: card power + the CPU's stock power limit + 150W for the rest of the system, then 20% headroom, rounded up to a real PSU size. "Needed" is the total including headroom.
| CPU | CPU power | Needed | PSU |
|---|---|---|---|
| Ryzen 5 7600 | 88W | 586W | 650W |
| Ryzen 5 9600X | 88W | 586W | 650W |
| Core i5-12400F | 117W | 620W | 650W |
| Ryzen 7 7800X3D | 162W | 674W | 750W |
| Ryzen 7 9800X3D | 162W | 674W | 750W |
| Core i5-14600K | 181W | 697W | 750W |
| Ryzen 9 9950X | 200W | 720W | 750W |
| Core Ultra 7 265K | 250W | 780W | 850W |
| Core i7-14700K | 253W | 784W | 850W |
| Core i9-14900K | 253W | 784W | 850W |
Why not just use 650W for everything?
A 650W PSU will usually boot and run any of these builds. The problem shows up under full load: GPUs pull short spikes well above their rated power, and a PSU running close to its limit can trip its protection and shut the PC off mid-game. Headroom also keeps the PSU in its efficient, quiet range.
Connectors
The RTX 5070 uses the 16-pin 12V-2x6 plug. If your PSU doesn't have a native 16-pin cable, use the adapter from the box with two separate 8-pin PCIe cables. See 12VHPWR vs 12V-2x6 for how to seat it properly.
Check your exact build in the calculator