Undervolting the Radeon RX 6800 XT can significantly reduce power consumption and heat while maintaining—or even improving—performance through better thermal headroom Recommended Undervolt Settings
A common mistake users make is setting the "Max Frequency" to 2700Mhz. While the 6800XT can technically hit that at stock voltage (1.2V), it cannot hit that voltage at 1.050V. 6800xt undervolt settings work
Of course, stability is the key challenge. Not every 6800 XT chip is identical; a golden sample might run stable at 990 mV, while an average card may crash below 1040 mV. The most reliable and widely reported working settings involve a three-step process: setting the voltage to 1050 mV, raising the power limit to +15% (to allow transient spikes), and leaving the VRAM frequency at its default 2100 MHz (or a mild 2110 MHz with Fast Timing). Users should then stress test with demanding benchmarks like Time Spy Extreme or games known for voltage sensitivity, such as Red Dead Redemption 2. If a crash or driver timeout occurs, increasing voltage by 10 mV steps until stable is the standard fix. Undervolting the Radeon RX 6800 XT can significantly