Reducing GPU Power Consumption Without Sacrificing DLSS 5 Performance

The widespread adoption of 12V-2×6 connectors in modern graphics cards has brought about concerns regarding connector melting, particularly under high power draw scenarios. These issues appear to be exacerbated by power spikes associated with NVIDIA's DLSS 5 technology. As a result, many users are seeking effective methods to lower GPU power consumption without compromising gaming performance.

Undervolting the NVIDIA GeForce RTX 4090: Real-World Testing

A recent community test conducted by a Reddit user, u/om_the_best, demonstrates that undervolting the NVIDIA GeForce RTX 4090 can significantly reduce power usage while maintaining both frame rates and image quality when using DLSS 5. The user reported a reduction in power draw by up to 47 watts, with no noticeable impact on gaming performance.

According to the test, undervolting allows users to enjoy the benefits of DLSS 5 while keeping power consumption at levels similar to running without DLSS 5 and without undervolting. The testing was performed using Hogwarts Legacy, with the RTX 4090 set to 925 mV and a base clock of 2,595 MHz. It's important to note that the optimal undervolt settings may vary between individual GPU units due to manufacturing differences.

Detailed Power and Performance Results

The results from the testing are as follows:

  • DLSS 5 off, MFG 4X, no undervolt: 386 W / 360 FPS
  • DLSS 5 off, MFG 4X, undervolted: 311 W / 355 FPS (-75 W)
  • DLSS 5 on, MFG 4X, no undervolt: 435 W / 175 FPS
  • DLSS 5 on, MFG 4X, undervolted: 388 W / 175 FPS (-47 W)
  • DLSS 5 on, MFG off, no undervolt: 426 W / 51 FPS
  • DLSS 5 on, MFG off, undervolted: 387 W / 52 FPS (-49 W)

These figures indicate that undervolting can lead to substantial power savings—ranging from 36 to 75 watts—without a significant drop in frame rates. In scenarios with DLSS 5 and MFG 4X enabled, the power draw was reduced by 47 watts, with frame rates remaining identical.

Image Quality and Practical Considerations

While assessing image quality from screenshots alone can be challenging, the available evidence suggests that undervolting does not introduce noticeable visual artifacts or degrade the output of DLSS 5. This aligns with the tester's claim that gaming visuals remain consistent before and after undervolting.

For users concerned about GPU longevity, power efficiency, or the risks associated with high power draw and connector reliability, undervolting presents a practical solution. As always, results may vary depending on the specific GPU and system configuration, so individual testing is recommended.