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The magic zone is . This combination dropped power consumption from ~290W to ~215-230W in gaming loads, with temperatures falling by 8–12°C.
: There is no risk of physical damage. If you go too low, the driver will simply crash and reset to defaults. Recommended Starting Settings
| Setting | Value | Rationale | | :--- | :--- | :--- | | | Enabled | Unlocks manual control. | | Min Frequency (Mhz) | 2300 | Prevents clock dropping too low. | | Max Frequency (Mhz) | 2450 | Sweet spot for thermal efficiency. | | Voltage (mV) | 1075 | The magic number. (Start here). | | VRAM Tuning | Enabled (Fast Timing) | Free performance. | | VRAM Max Frequency | 2110 Mhz | Stable for 90% of Samsung/ Micron dies. | | Power Limit (%) | +5% or +10% | Gives headroom for voltage dips. | | Fan Tuning | Enabled (Advanced) | 40% baseline, 70% at 80°C. |
This occurs when your GPU doesn't have enough voltage to reach its target frequency. Instead of crashing, the GPU about its clock speed. It reports, for example, 2500 MHz to software like MSI Afterburner, but its internal logic is actually running at a much lower, slower speed to maintain stability. This gives you the worst of both worlds: increased temperatures and poor performance. 6800xt undervolt settings work
: Use stress testing tools like 3DMark Time Spy or OCCT's 3D Adaptive test for at least 10 minutes.
Undervolting the AMD Radeon RX 6800 XT reduces power draw and temperatures while often keeping near-stock performance. Aim: improve efficiency (higher performance-per-watt) and thermals with stable settings for typical silicon. Results vary by card, cooler, and workload.
These users are lying or only ran Furmark for 30 seconds. True stability requires testing three distinct workloads: The magic zone is
Use 3DMark Time Spy or Superposition to test stability.
Every 6800 XT is different (the "silicon lottery"), but most cards can handle a significant reduction. ≈1150mV - 1200mV
Fast Timing enabled, Max Frequency at 2100 MHz If you go too low, the driver will
Find the "Voltage (mV)" setting. Start by lowering the maximum voltage by 50mV–100mV.
When you lower the voltage, you directly decrease the card's power consumption and heat output. Because AMD’s Boost algorithm relies heavily on thermal and power headroom, a cooler card can actually maintain higher clock speeds for longer periods. The Benefits Expect a drop of 5∘C5 raised to the composed with power C 15∘C15 raised to the composed with power C on both edge and junction temperatures.