What power supply do you need for Gainward Phantom GeForce RTX 3070
Short answer
Gainward Phantom GeForce RTX 3070 needs a power supply of at least 550 W in a build with a mid-range CPU (500 W with a budget CPU, 600 W with a high-end one). The bare minimum is 450 W; the card's TDP is 220 W, short system spikes reach 503 W. Source of the numbers: FPSHQ calculation from manufacturers' TDP with power headroom (methodology).
| TDP Gainward Phantom GeForce RTX 3070 | 220 W |
|---|---|
| Graphics card spikes (estimate) | up to 308 W calculation |
| PSU with a mid-range CPU (105 W) | 550 W calculation |
| PSU with a budget CPU (65 W) | 500 W calculation |
| PSU with a high-end CPU (150 W) | 600 W calculation |
| Absolute minimum | 450 W calculation |
| Power connectors | 2×8-pin |
Looking for something else? How much power Gainward Phantom GeForce RTX 3070 draws · PSU for a specific game · PSU table for all graphics cards
PSU wattage for Gainward Phantom GeForce RTX 3070 by CPU class
| CPU in the build | Load | Peak | Minimum | Recommended PSU |
|---|---|---|---|---|
| Budget CPU (65 W: Core i3/i5 non-K, Ryzen 5 non-X) | ~375 W | up to 463 W | 450 W | 500 W 80+ Bronze |
| Mid-range CPU (105 W: Core i5-K, Ryzen 5/7 X) | ~415 W | up to 503 W | 500 W | 550 W 80+ Bronze |
| High-end CPU (150+ W: Core i7/i9-K, Ryzen 9) | ~460 W | up to 548 W | 550 W | 600 W 80+ Bronze |
Method: graphics card TDP (220 W) + CPU TDP + 90 W for the board, memory, drives and fans; card spikes up to +40% of TDP; the recommendation is load +30%, but not below the peak, rounded up to a standard rating.
PSU for Gainward Phantom GeForce RTX 3070 with a specific CPU
CPUs in the same performance tier as Gainward Phantom GeForce RTX 3070, with their exact TDP; a click opens the pair calculation with FPS.
| CPU | TDP CPU | Load | Recommended PSU | |
|---|---|---|---|---|
| Ryzen 5 3600X | 65 W | ~375 W | 500 W | Pair calculation → |
| Core i5-12450H | 45 W | ~355 W | 500 W | Pair calculation → |
| Core i7-11800H | 45 W | ~355 W | 500 W | Pair calculation → |
| Ryzen 5 3600 | 65 W | ~375 W | 500 W | Pair calculation → |
| Ryzen 7 6800H | 35 W | ~345 W | 450 W | Pair calculation → |
PSU for graphics cards in the Gainward Phantom GeForce RTX 3070 class
Key figures
Unique FPSHQ metrics from this page's data
What power supply do you need for Gainward Phantom GeForce RTX 3070
We recommend 550 W or more for a build with a mid-range CPU. With a budget CPU 500 W is enough; with a high-end one get 600 W.
- TDP Gainward Phantom GeForce RTX 3070
- 220 W
- Graphics card spikes (estimate)
- up to 308 W
- PSU with a mid-range CPU (105 W)
- 550 W
- PSU with a budget CPU (65 W)
- 500 W