Overclocking VRAM adds heat to the memory controller. If you undervolt too aggressively (sub 1050mV) AND use Fast Timings at 2150Mhz, you will get "memory correction errors" (lower FPS despite higher clock).
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.
AMD Adrenalin allows you to save per-game profiles. Use this feature. Do not force a 1040mV profile on Returnal ; it will crash on the title screen. 6800xt undervolt settings work
involves reducing the voltage supplied to the GPU core to lower power consumption and heat while maintaining—or even slightly improving—performance. Because of "silicon lottery," every individual card has a unique stable limit, but most
This guide dives into the best settings, how to find the sweet spot for your specific card, the tools you need, and the common pitfalls to avoid. Overclocking VRAM adds heat to the memory controller
Increasing the power limit to +15% is recommended to ensure the card isn't artificially throttled while you are testing for voltage stability.
Stuttering occurs when the minimum and maximum GPU frequencies are too far apart, causing the card to constantly shift power states. Ensure your minimum clock frequency remains within 100 to 150 MHz of your maximum clock speed to stabilize frame delivery. Your goal is to combine a lower voltage
This lowers your electric bill and reduces heat output into your room.
Fans spin slower and quieter due to reduced heat output.
Ray tracing utilizes specific physical hardware blocks on the Navi 21 die that draw heavy transient spikes of power. If RT games crash your undervolt, maintain a separate "RT Profile" with an extra +15 mV of voltage buffer.
Perhaps the most compelling advantage is that undervolting often leads to higher sustained clock speeds. The Radeon boost algorithm is heavily temperature-dependent; as the core heats up, clocks are dialed back to stay within power or thermal limits. A cooler core from undervolting allows the GPU to maintain its boost clocks for longer periods. In practice, this means an undervolted 6800 XT can frequently outperform its stock configuration. In titles like Cyberpunk 2077 or Call of Duty: Warzone , users report a 3-5% increase in average FPS simply because the card is no longer throttling. It transforms the 6800 XT from a hot, power-hungry card into an efficient competitor, often matching the performance of a stock RTX 3080 while consuming less power.