AMD Adrenalin 26.1.1 reportedly breaks undervolting on new GPUs

Users of AMD graphics cards are reporting unexpected issues after installing the latest Adrenalin Edition 26.1.1 driver. According to multiple accounts, the update appears to disrupt previously stable custom power and voltage profiles, particularly on newer Radeon GPUs.

One of the most visible cases involves the Radeon 9070 XT, where undervolting settings that worked flawlessly on earlier drivers now cause immediate instability.

Stable undervolts no longer work

A Reddit user going by SnooJokes5264 shared their experience, noting that an undervolt of –50 mV combined with a –9% power limit was completely stable on Adrenalin 25.12.1. After updating to 26.1.1, however, those same settings began causing instant game crashes.

Launching Cyberpunk 2077 with the old profile results in a crash at startup. Stability only returns after resetting all tuning options to factory defaults, suggesting the issue is directly tied to manual voltage and power adjustments rather than the game itself.

Possible changes under the hood

While AMD has not officially acknowledged the problem, the behavior points to silent changes in voltage curves or frequency control algorithms for newer GPU architectures in driver version 26.1.1.

If that’s the case, it would explain why undervolting values that were once safe now push the GPU beyond its new stability thresholds. Even small offsets that previously reduced temperatures and power draw without side effects may now trigger crashes.

Adrenalin 26.1.1 appears to alter how newer Radeon GPUs handle voltage and power, effectively invalidating previously stable undervolt profiles. For now, users focused on efficiency rather than stock performance may want to hold off on updating or be prepared to retune from scratch.

As always with GPU drivers, stability beats small gains, especially when the changes happen without warning.

Source: Reddit