slightly higher than stock (e.g., 2400 MHz) for better performance. Memory & Power VRAM Tuning , set it to , and select Fast Timings for a free performance boost. Max out the Power Limit slider (+15%) to give the card breathing room under load. Stress Test : Use benchmarks like 3DMark Time Spy or built-in game benchmarks (like Cyberpunk 2077
Set this to 100 MHz below your Max Frequency (e.g., 2300 MHz) to keep clocks stable during gaming.
+15% (Allows the card to utilize power more efficiently when needed). The Best "Sweet Spot" Configuration 6800xt undervolt settings work
| Model / User Goal | GPU Clock (Max Freq) | Voltage (mV) | Power Consumption | Temperature | Stability | | :--- | :--- | :--- | :--- | :--- | :--- | | | 2500 - 2550 MHz | 975 - 1050 | ~200W | 55°C GPU / 70°C Junction | High (Requires Good Chip) | | Balanced UV / Efficient | 2300 - 2350 MHz | 950 - 1000 | ~170 - 200W | 60 - 65°C | Very High | | Conserv. & Low Power | 1970 - 2160 MHz | 800 - 900 | ~175W | < 65°C | Highest |
Synthetic tests are great, but real games expose instability faster. Play graphically demanding titles like Cyberpunk 2077 , Metro Exodus , or The Witcher 3 Next-Gen for an hour. Pay close attention to: slightly higher than stock (e
Run or Superposition consecutively for 30 minutes. If the benchmark completes without artifacts, stuttering, or driver timeouts, return to the software menu and drop the voltage by another 10 mV. Repeat this loop until the system crashes or restarts. Finding the Floor
If you want to skip the guesswork and go straight to settings that "just work" for daily gaming (24/7 stability), the community has narrowed down a specific voltage range for the Navi 21 GPU. Stress Test : Use benchmarks like 3DMark Time
An effective undervolt usually drops edge temperatures by .
: Lower the voltage slider. Most 6800 XT cards are stable at 1050 mV , but "golden chips" can sometimes reach 950 mV or lower.