Undervolting Your GPU: Lower Temperatures Without Sacrificing Performance

Is your graphics card running hot during games? Does your desk turn into a radiator in the summer? Undervolting is one of the most cost-effective optimizations you can apply to a gaming PC: by slightly reducing the GPU's power voltage, you get a cooler, quieter, and more power-efficient card — all without sacrificing performance, and sometimes even stabilizing it.

This tutorial guides you step-by-step, whether you have a GeForce RTX or a Radeon. It takes 30 to 45 minutes, no screwdriver needed.

Undervolting: What Exactly Are We Talking About?

Each GPU leaves the factory with a deliberately generous voltage/frequency curve: the manufacturer applies a wide safety margin to guarantee the stability of all produced units, including those less fortunate in the silicon lottery. The result: most cards receive more voltage than necessary to maintain their frequencies.

Undervolting involves reducing this voltage while maintaining a frequency close (or identical) to the original. The benefits are direct:

• Lower temperatures: often 5 to 10 °C less under load.
• Less noise: fans spin slower.
• Reduced power consumption: easing the load on the power supply and your electricity bill.
• Stable performance: a cooler GPU maintains its boost better over time, especially during long sessions.

Is it risky? No, and this is the important point: unlike overclocking with overvoltage, undervolting cannot damage your card. At worst, too low a voltage will cause a game or driver crash — you just need to slightly increase the voltage. All settings are reversible with a click.

Preparation: Essential Tools

• MSI Afterburner (free, works with all brands of Nvidia cards): this is the reference tool for GeForce.
• AMD Software Adrenalin: for Radeon, everything is integrated into the driver, Performance > Tuning section.
• A monitoring tool: Afterburner's overlay (RivaTuner) or HWiNFO64 to track temperature, frequency, and power consumption in real time.
• A demanding game or benchmark to test stability: 3DMark, Cyberpunk 2077, or any recent title that loads the GPU to 100%.

Before you start, note your reference values: run your test game for 10 minutes and record the average GPU frequency, temperature, and power consumption. You can then objectively measure the gain.

Nvidia Method: Afterburner's Voltage/Frequency Curve

Step 1: Open the Curve Editor

Launch MSI Afterburner then press Ctrl + F. A window opens with the famous curve: each point represents a frequency (vertical axis) associated with a voltage (horizontal axis, in mV).

Step 2: Identify Your Operating Point

In-game, identify the frequency your GPU actually maintains under load and the associated voltage, often between 1,000 and 1,100 mV. The goal: to obtain this same frequency at a lower voltage, typically between 900 and 975 mV.

Step 3: Reshape the Curve

1. Choose your target voltage (start cautiously at 975 mV).
2. On the curve, select the point corresponding to this voltage and move it up to the target frequency (drag with the mouse or keyboard arrows for precision).
3. Select all points to the right of this point (Shift + drag) and flatten them to the same level: the GPU will never exceed this voltage.
4. Validate with Afterburner's checkmark.

Step 4: Test Stability

Run your test game for 15 to 20 minutes. Monitor three things: frequency (should remain stable at the targeted value), temperature (it should decrease), and the absence of crashes or visual artifacts. If it crashes, increase the voltage by 25 mV and repeat. If it's stable, you can try to lower it another 25 mV to optimize further.

Once the setting is validated across several games, save it in an Afterburner profile and check "start with Windows" for automatic startup.

AMD Radeon Method: Even Simpler

On Radeon, open AMD Software Adrenalin, Performance > Tuning tab. Two approaches:

• Automatic: the "GPU Undervolt" button applies a conservative undervolt with one click. Ideal for beginners.
• Manual: switch to custom tuning and lower the maximum voltage in increments of 25 mV (e.g., from 1,150 to 1,050 mV), testing stability at each step as described above.

Mistakes to Avoid

• Lowering voltage too quickly: proceed in 25 mV increments, not 100.
• Testing for too short a time: some crashes only appear after 30 minutes or on a specific game. Validate across several titles.
• Confusing undervolt and power limit: reducing the power limit also lowers power consumption, but at the cost of reduced performance. A well-done undervolt maintains frequency.
• Forgetting the profile on reboot: without a saved and applied profile at startup, your settings disappear on reboot.

What Gains Can You Expect Practically?

Results vary depending on the quality of your chip, but on recent generations (RTX 40/50, RX 7000/9000), a well-executed undervolt generally results in a 10 to 20% reduction in power consumption, several degrees less under load, and significantly reduced noise — particularly noticeable on compact configurations or during summer. Performance, meanwhile, remains within the margin of error of measurements, if not slightly improving thanks to better-maintained boost clocks.

Conclusion

Undervolting is a free, reversible, and safe adjustment that improves the daily experience of any gaming PC: a cooler, quieter, more efficient machine. It's also an excellent way to get to know your hardware and its real limits.

At DSGate, every PC is assembled in France and tested before shipment, with cabling and ventilation designed for good baseline temperatures — a healthy foundation to go even further with an undervolt. Discover our gaming PCs assembled in France.