Buzz
The GPU selected for the experiment is the PowerColor Liquid Devil, the highest-end variant available for the Radeon RX 7900 XTX. Priced at $1819, equivalent to 42.75 million VND, it surpasses the MSRP of the RTX 4090. The Liquid Devil features a complete PCB design with a liquid cooling system for efficient heat dissipation across VRAM, GPU, and a 17-phase VRM design.
PowerColor AMD Radeon RX 7900 XTX Liquid Devil achieves clock speeds of 2510MHz (gaming mode) and 2680MHz (boost mode). Essentially, the GPU's clock speeds are higher by 240MHz (gaming mode) and 180MHz (boost mode) compared to AMD's reference MBA.
In this experiment, Der8auer utilized the EVC2SE module from ElmorLabs, a DIY toolkit enabling precise digital voltage control similar to using I2C/SMBus/PMBus.
Initially, Der8auer raised the standard power limit to +15, achieving a clock speed of 3GHz with power consumption reaching 400W. Additionally, with the EVC2SE module, voltage adjustments previously locked on the graphics card could be modified. At 1.045V, the Radeon RX 7900 XTX reached a power consumption of 500W, with the clock speed slightly increasing to around 3,050MHz.
In the final experiments, Der8auer pushed the Radeon RX 7900 XTX to its ultimate limits. He increased the maximum clock speed to 3244MHz, resulting in a power consumption of 650W. The achieved TBP is nearly double AMD's declared 355W.
In the 3DMark Time Spy Extreme test, the Radeon RX 7900 XTX scored over 17,000 points, securing the 13th position in the Hall of Fame rankings. Additionally, during gaming, the clock speed reached an impressive 3.4GHz.
Overall, the clock speed achieved by Der8auer is not the highest ever tested on the Radeon RX 7900 XTX. The highest recorded clock speeds ranged from 3.4 to 3.5GHz. However, this test demonstrates significant potential if AMD doesn't restrict voltage or power consumption on its product.
The record for the highest clock speed on a GPU still belongs to the RTX 4090, reaching a maximum clock speed of 4GHz with liquid nitrogen cooling (LN2) and achieving 3.3GHz+ with liquid cooling.
