What power supply do you need for the RTX 3070?
The GeForce RTX 3070 is rated at 220 W total board power. That's 20 W more than the RTX 3060 Ti. Here's the PSU size we recommend, the bare minimum, and what to buy.
With a typical gaming CPU (Ryzen 7 9800X3D), the RTX 3070 draws about 367 W while gaming and up to 464 W under full load. GPU spikes can briefly reach about 618 W, so choose an ATX 3.1 unit rated 80+ Gold or better.
RTX 3070 PSU size by CPU
| Build | CPU | Gaming draw | Minimum | Recommended |
|---|---|---|---|---|
| Budget | Ryzen 5 7600 | 344 W | 550 W | 550 W |
| Gaming | Ryzen 7 9800X3D | 367 W | 550 W | 650 W |
| High-end | Core i9-14900K | 432 W | 650 W | 750 W |
Assumes 2 memory sticks, 1 NVMe SSD, air cooling and 3 fans, with no overclocking. Using a different CPU? Calculate your exact build.
Best power supplies for the RTX 3070
Our 650 W picks. Every one is a fully modular, 80+ Gold or better unit from a brand with a strong reliability record.
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RTX 3070 power specs
| Total board power | 220 W |
|---|---|
| Estimated ms-level spike | ≈ 374 W |
| Power connectors | Needs about 1× 8-pin PCIe cable (use separate cables, not one daisy-chained cable, when you can). |
| Recommended PSU (pre-ATX 3.0 unit) | 650 W |
| Estimated running cost | ≈ $8.79/month (3 h/day at $0.18/kWh) |
Frequently asked questions
Is 450W enough for the RTX 3070?
No. With a typical gaming CPU, the RTX 3070 can push a 450 W PSU past its safe limit (about 103% at full load). Get at least 550 W, ideally 650 W.
Is 550W enough for the RTX 3070?
It can work, but it's tight. A full-load stress test would push a 550 W unit to about 84% of its rating. We recommend 650 W for quieter, safer operation.
Is 650W enough for the RTX 3070?
Yes. A quality 650 W ATX 3.x power supply runs the RTX 3070 with a typical gaming CPU at about 56% load while gaming.
Is 750W enough for the RTX 3070?
Yes. A quality 750 W ATX 3.x power supply runs the RTX 3070 with a typical gaming CPU at about 49% load while gaming.
Is 850W enough for the RTX 3070?
Yes. A quality 850 W ATX 3.x power supply runs the RTX 3070 with a typical gaming CPU at about 43% load while gaming.
What power connector does the RTX 3070 use?
Needs about 1× 8-pin PCIe cable (use separate cables, not one daisy-chained cable, when you can).