What PSU do you need for the RTX 4070 Ti Super?
With a 120 W CPU such as the Ryzen 7 9800X3D: 750 W is the safe choice, and a good-quality 650 W unit also covers the card's measured draw.
With a 65 W CPU, 750 W (650 W good-quality). With a 253 W CPU, 850 W.
Measured card power, not rated power: 294 W average while gaming, 320 W highest 20 ms spike.
Is my power supply enough? 450–1600 W
Each cell is the sustained gaming load as a share of the label. ✓ Safe: the load fits, the card's measured spikes stay under the label, and the size meets the higher published recommendation (700 W). ✓ Good unit: the measured draw fits, but the size is below 700 W — fine with a well-reviewed unit, not with a no-name one. ✗: not recommended — the steady load is over 80% of the label, a spike passes the label, or the size is below 700 W without meeting the good-unit bar.
| PSU | 65 W CPU e.g. Ryzen 7 9700X | 120 W CPU e.g. Ryzen 7 9800X3D | 253 W CPU e.g. Core i7-13700K |
|---|---|---|---|
| 450 W | ✗ 96% | ✗ 109% | ✗ 138% |
| 550 W | ✗ 79% | ✗ 89% | ✗ 113% |
| 650 W | ✓ Good unit 67% | ✓ Good unit 75% | ✗ 96% |
| 750 W | ✓ Safe 58% | ✓ Safe 65% | ✗ 83% |
| 850 W | ✓ Safe 51% | ✓ Safe 58% | ✓ Safe 73% |
| 1000 W | ✓ Safe 43% | ✓ Safe 49% | ✓ Safe 62% |
| 1200 W | ✓ Safe 36% | ✓ Safe 41% | ✓ Safe 52% |
| 1600 W | ✓ Safe 27% | ✓ Safe 31% | ✓ Safe 39% |
Sustained load = card's measured gaming draw + CPU at its TDP (Intel 12th gen and later: maximum turbo power; games usually draw less, so this errs high) + 75 W for board, memory, drives and fans: 65 W CPU 434 W · 120 W CPU 489 W · 253 W CPU 622 W.
Measured power draw
| Gaming average | 294 W |
|---|---|
| Highest 20 ms spike | 320 W |
| Rated board power | 285 W (NVIDIA) |
| Card measured | MSI GeForce RTX 4070 Ti Super Ventus 3X (board-partner model; other models of this GPU can draw somewhat more or less) |
Measurements are from TechPowerUp's review of this card, which records card-only power with dedicated equipment. TechPowerUp's test method has changed over the years, and newer test runs of the same card can read higher — one more reason the safe choice never goes below the published recommendations.
Why PSU recommendations disagree
- NVIDIA: 700 W (spec page). The maker's figure has to cover any CPU and any power supply.
- TechPowerUp: 650 W minimum, sized from the card's measured draw.
- Most online calculators add up rated power (TDP) for every part and then add a margin. Rated power is not what a card or CPU actually draws in games, which is why their answers can differ by 100 W or more.
- This page: the safe choice never goes below 700 W, the higher of the published figures. The good-unit size uses the measured draw and never goes below TechPowerUp's minimum. See the methodology.
Connectors
Expect two 8-pin PCIe connectors or a single 12V-2x6 depending on the model. Most 650–850 W units from the last five years have both.
When to step up a size
Overclocking, a factory-overclocked card, more than four drives or a lot of fans and RGB each add tens of watts. If two or more apply, take the next size up. Check your exact card's spec sheet too — some board partners list a higher minimum.
Try your exact CPU in the PSU calculator · Best CPU for the RTX 4070 Ti Super