A setting that works in one application may crash in another. Use a tiered benchmarking methodology to ensure absolute stability. Synthetic Benchmarks
Use this checklist to confirm your undervolt is functioning. 1. Benchmark and Log Stock Performance
Based on extensive community testing across the web, the best stable undervolt for your specific card will land somewhere within these ranges. Your goal is to combine a lower voltage with a high, stable clock speed. 6800xt undervolt settings work
Is the gameplay smooth, or are there micro-stutters?
Graphics card manufacturers apply a generous voltage cushion to every GPU chip. This ensures stability across a wide variance of silicon quality (the "silicon lottery"). A setting that works in one application may crash in another
| 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 |
| 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. | Is the gameplay smooth, or are there micro-stutters
Undervolting your 6800 XT is one of the best ways to get better performance, lower temperatures, and higher efficiency in 2026. By setting your voltage to roughly and managing your fan curves, you can keep this card competitive for years to come.