Undervolting the AMD Radeon RX 9070 might sound like it would weaken its performance, but quite the opposite happens. By tweaking the voltage, it actually becomes more efficient, enhancing its performance per watt and making it a standout contender against its competitors.
Let’s dive into how this works. The standard Radeon RX 9070 delivers about 54 FPS when tested with the Cyberpunk 2077 benchmark under its default settings. But after a bit of fine-tuning with the AMD Adrenalin software, things get interesting. By dialing down the power consumption by 30% and lowering the voltage to around 770-780mV from the baseline 850-900mV, the GPU clocks down to just under 2.2 GHz.
Yet, with a voltage reduction of 50mV, the GPU clock speed actually jumps by 100 MHz, holding the voltage steady around 740-750mV. A further voltage cut of 50mV bumps the clock speed to an impressive 2.4 GHz. Although 50-100mV undervolting remains stable, anything beyond that risks instability.
Testing the GPU again after these adjustments, the performance was noteworthy. The GPU registered 50 FPS—a mere 4 FPS less than the stock performance. This translates to a remarkable 30% improvement in FPS per watt efficiency compared to the standard settings. It’s a notable win, especially when up against the RTX 4070 Ti Super, which scored 46 FPS in the same test.
Even with these energy savings, the RX 9070 series shines. Operating at just 170W, the performance is almost indistinguishable from the 200-220W default settings. With a small power boost, the GPU can easily exceed 2.7 GHz and potentially reach beyond 2.8 GHz with just a 50mV undervolt—pretty impressive!
Pushing the boundaries even further by reducing the voltage by another 50mV, the GPU clocks surged to 2.95 GHz. That’s over 250 MHz above its advertised boost clock, allowing the card to hit a solid 60 FPS—a significant 11% improvement over the default setup. The potential to unlock over 10% more performance in both the RX 9070 XT and RX 9070 makes them enticing choices for any tech enthusiast or gamer, bridging efficiency with powerful performance.
