RTX 5090 Undervolting Results: -6% at ~400W
Taken from Tech Yes City's video here. Big shoutout to him for being the only reviewer I've seen so far exploring this.
It's only in Space Marine 2, but here are the results:
| Card | FPS | Power (W) | dFPS | dPower |
|---|---|---|---|---|
| RTX 5090 Stock | 133 | 575 | 0% | 0% |
| 2.7GHz @ 960mV | 133 | 485 | 0% | -16% |
| 2.5GHz @ 900mV | 125 | 405 | -6% | -30% |
| 2.3GHz @ 875mV | 117 | 356 | -12% | -38% |
| RTX 4090 Stock | 97 | 415 | -27% | -28% |
So RTX 4090 Stock vs 5090 2.5GHz @ 900mV has roughly the same power consumption with the 5090 performing ~28% better.