GeForce RTX 5090 consumes up to 500W and loses only 2% FPS after setting the voltage to 895 mV - GameGPU

With a base TDP of up to 600 W, the RTX 5090 places a colossal thermal load on the cooling system and power connectors. Enthusiasts are benchmarking various voltage-frequency curve settings in MSI Afterburner to mitigate this load.

Reducing the operating voltage to 895 mV at frequencies around 2800 MHz allows for a 13% to 18% reduction in power consumption. This keeps power draw within 450–500 W in demanding scenarios, making the profile attractive for long-term use.

The community is debating the best method for this optimization. Some users choose to raise a single voltage point at 895 mV, while others prefer a smooth ramp of the entire operating range from 820 to 895 mV.

Performance impact

Gaming performance losses with this optimization remain minimal, typically falling between 0% and 2%. Proponents of the smooth ramp method point to the Blackwell architecture's boost algorithms, which automatically reduce voltage under heavy load.

If intermediate voltage points are left at default values, the graphics card's frequency drops sharply when the voltage is reduced, leading to micro-freezes and a drop in average frame rate. A smooth ramp eliminates these sudden frequency drops.

Some owners fear hidden instability in menus or light games, where these intermediate voltage levels are used more often. Experience shows that due to variations in silicon quality, there is no universal solution.

Stability testing

Participants in the discussion emphasized the importance of comprehensive stability testing in projects involving path tracing. Some enthusiasts resort to installing hardware current indicators on the power connector to prevent the risk of overheating contacts during long gaming sessions.

Users are advised to first evaluate the average frequencies of a specific stock chip before committing to aggressive curve values.