What PSU do you need for the GTX 1080 Ti?
With a 120 W CPU such as the Ryzen 7 9800X3D: 650 W is the safe choice.
With a 65 W CPU, 650 W. With a 253 W CPU, 850 W.
Measured card power, not rated power: 231 W average while gaming, 267 W peak reading.
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 and the size meets the higher published recommendation (600 W). ✗: not recommended — the steady load is over 70% of the label or the size is below 600 W.
| 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 | ✗ 82% | ✗ 95% | ✗ 124% |
| 550 W | ✗ 67% | ✗ 77% | ✗ 102% |
| 650 W | ✓ Safe 57% | ✓ Safe 66% | ✗ 86% |
| 750 W | ✓ Safe 49% | ✓ Safe 57% | ✗ 75% |
| 850 W | ✓ Safe 44% | ✓ Safe 50% | ✓ Safe 66% |
| 1000 W | ✓ Safe 37% | ✓ Safe 43% | ✓ Safe 56% |
| 1200 W | ✓ Safe 31% | ✓ Safe 36% | ✓ Safe 47% |
| 1600 W | ✓ Safe 23% | ✓ Safe 27% | ✓ Safe 35% |
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 371 W · 120 W CPU 426 W · 253 W CPU 559 W. This card's review has no 20 ms spike data, so we keep the load at or under 70% of the label instead of 80%.
Measured power draw
| Gaming average | 231 W |
|---|---|
| Peak reading while gaming | 267 W |
| Rated board power | not listed by the maker any more |
| Card measured | NVIDIA GeForce GTX 1080 Ti Founders Edition 11 GB |
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. This is an older review: its peak comes from a slower sampling method, so real short spikes can be well above it.
Why PSU recommendations disagree
- NVIDIA: 600 W (spec page). The maker's figure has to cover any CPU and any power supply.
- TechPowerUp: no minimum listed in its review.
- 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 600 W, the higher of the published figures. 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 GTX 1080 Ti