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
| Metric | Stock Defaults (1150 mV) | Working Undervolt (970 mV) | | :--- | :--- | :--- | | | 1150 mV | 970 mV (-180 mV) | | GPU Clock Speed | ~2260 MHz (throttled) | ~2395 MHz (sustained) | | Power Consumption | 255 Watts | 210 Watts | | GPU Temperature | 80°C | 73°C | | Junction Temp | 106°C (Hot) | 85°C (Safe) | | Fan Speed | ~1730 RPM (Loud) | Quieter |
If you have a well-binned card, this profile maximizes power savings and runs incredibly cool. 2400 MHz Voltage (mV): 1025 mV – 1050 mV Memory Tuning: Fast Timing, 2120 MHz Power Limit: +15% Step-by-Step Guide to Undervolting the 6800 XT
to prevent the card from throttling during transient spikes. Step-by-Step Guide to Applying Settings 6800xt undervolt settings work
Once your GPU core voltage is locked in, you can maximize performance with two final tweaks:
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.
: Run 3DMark Time Spy or Heaven Benchmark . If your score increases or stays the same while temperatures drop, the undervolt is working. slightly higher than stock (e
If you’d like, give your card’s baseline numbers and I’ll produce a step-by-step, numbered undervolt profile to try.
Disable "Zero RPM" mode if you prioritize thermal longevity. Create a progressive curve that hits 65% fan speed when the GPU Hot Spot reaches 85°C. The Stability Testing Methodology
Undervolting the can significantly reduce power consumption by up to 80W and drop temperatures by 10–15°C with minimal performance loss . Recommended Undervolt Settings Stress Test : Use benchmarks like 3DMark Time
Before applying any settings, it is vital to understand the concept of the silicon lottery. No two GPU chips are identical. One 6800 XT might run flawlessly at a deeply dropped voltage of 1025mV, while another identical model from the same brand might crash at anything below 1100mV.
: Lower the Voltage slider to 1075 mV and hit "Apply".
Learning how to undervolt your RX 6800 XT is a skill that pays off immediately. By finding the right 6800XT undervolt settings for your specific card, you unlock a cooler, quieter, and more efficient GPU. The "working settings" aren't a single number, but a range you discover through a simple process of trial and error using a tool like AMD Adrenalin. Your card will thank you for it with lower temperatures and often higher, more stable performance.
: Go to Performance > Tuning . Change the Tuning Preset to Manual . GPU Tuning : Enable GPU Tuning and Advanced Control .
Undervolting the Radeon RX 6800 XT Go to product viewer dialog for this item.