Finally got around to undervolting my Gigabyte GeForce RTX 4070 SUPER EAGLE OC. I thought it was a joke when people said they couldn’t go below 925mV, but turns out it’s absolutely true – the 4070s simply refuses to accept an undervolt below 925mV, it just ignores that kind of curve.
Previously, I tested 3080 Ti FTW3, and that was way more fun – much more freedom and flexibility. The 4070S is very power efficient, but it's too locked down in terms of undervolt headroom.
I’m planning to make a full video guide on how to properly undervolt NVIDIA GPUs, because I see a lot of people doing it either wrong or not understanding how it works at all.
The most common mistake is not shaping the curve, but instead creating a peak – which leads to overvoltage on the left side of the curve after the intersection point, and lower effective frequency due to the large gap between voltage points.
BTW, in the new MSI Afterburner 4.6.6 Beta 5, creating a proper curve has become even easier, just double-press L to limit the curve from going above your target voltage. Do not confuse this with a single press of L, which completely locks the voltage to a fixed point.
Spreadsheet link:
https://docs.google.com/spreadsheets/d/1AS2OuGez9Lg41flLo2azxjFyGTJhZEmGgtRvYU1VaFE/