Undervolt GPU: a complete guide for a cooler and quieter card

Is your graphics card running hot, loud, and driving up your electricity bill? Undervolting is one of the most effective and safest optimizations you can apply to your GPU. When done correctly, it can reduce your card's temperature, noise, and power consumption without sacrificing performance—and sometimes even improving it. This guide explains the complete method for both Nvidia GeForce and AMD Radeon cards.

What is undervolting and why does it work?

Every GPU leaves the factory with a voltage/frequency curve defined by the manufacturer. To ensure that 100% of the produced chips are stable, this curve is intentionally generous with voltage: most units can achieve the same frequencies with less voltage than what the factory setting provides.

Undervolting involves exploiting this margin: you instruct the GPU to achieve its target frequency with a lower voltage. Less voltage means fewer watts dissipated, which in turn means less heat, quieter fans, and often a boost that sustains higher for longer because the card reaches its thermal limits less quickly.

• Temperature: Typical drop of 5 to 15 °C depending on the card and cooling
• Power Consumption: Common reduction of 10 to 25% in games
• Noise: Significantly quieter fans at the same load
• Performance: Identical, sometimes slightly better due to a more stable boost

Is it risky? No, and this is what distinguishes undervolting from overclocking: lowering the voltage cannot damage your hardware. At worst, an overly aggressive setting will cause a driver or game crash—you simply need to slightly increase the voltage. Note that each chip is unique: stable values vary from one unit to another, hence the importance of testing gradually.

Prerequisites: tools to install

• For Nvidia: MSI Afterburner (free, works with all card brands, not just MSI)
• For AMD: AMD Software Adrenalin Edition, already installed with your drivers
• For monitoring: HWiNFO64 or Afterburner overlay (temperature, power consumption, frequency)
• For stability testing: a demanding game you know well, 3DMark (Steel Nomad or Time Spy loop) or the integrated benchmark of a game like Cyberpunk 2077

Nvidia Method: Afterburner's Voltage/Frequency Curve

Step 1: Note your starting point

Launch a demanding game for about ten minutes and note your GPU's actual boost frequency (e.g., 2,700 MHz) and the associated voltage (often around 1.000 to 1.050 mV). These values are visible in Afterburner's overlay or in HWiNFO64.

Step 2: Open the curve editor

In MSI Afterburner, press Ctrl + F to open the voltage/frequency curve editor. Each point represents a frequency achieved for a given voltage.

Step 3: Build the undervolted curve

• Choose a target voltage lower than the one noted in-game, for example 900 mV (a good starting point for most recent cards).
• Select the point on the curve corresponding to 900 mV and raise it to your desired frequency, slightly below your original boost (e.g., 2,600 MHz if you were at 2,700 MHz).
• Then flatten the entire curve to the right of this point: select the subsequent points and align them to the same frequency. This way, the GPU will never exceed 900 mV.
• Click the apply checkmark in Afterburner.

Step 4: Test, adjust, lock

Launch your reference game or benchmark for at least 20 to 30 minutes. If everything is stable, you can try to go even lower (875 mV, 850 mV…) or raise the frequency in steps of 15 MHz. In case of a crash, raise the voltage by one step or lower the frequency by 30 MHz. Once satisfied, save the setting in an Afterburner profile and enable it to apply on Windows startup.

AMD Method: Undervolting built into Adrenalin

AMD has the advantage of offering undervolting directly in its drivers, without third-party software.

• Open AMD Software Adrenalin Edition, then the Performance → Tuning tab.
• Switch to Manual Tuning and enable GPU Voltage Control.
• Lower the maximum voltage in steps of 25 mV: if your card runs at 1,150 mV originally, test 1,100, then 1,075, then 1,050 mV, etc.
• Test stability after each step with your reference game.
• You can also lower the Power Limit by a few percent to enhance power consumption gains.

The "Undervolt GPU" one-click option offered by Adrenalin is a good automatic first step, but a well-tested manual adjustment almost always yields better results.

Validate stability: don't skip this step

An undervolt may seem stable in one game but crash in another, because not all games stress the GPU in the same way. To seriously validate your setting:

• Test several different games, including a title with ray tracing if your card supports it—ray tracing often stresses parts of the GPU that are more sensitive to voltage drops.
• Alternate between heavy and light loads: frequency transitions are a critical moment for stability.
• Monitor for visual artifacts (flickering, abnormal pixels): these indicate a setting that is too tight even without a crash.
• Keep the setting under observation for a few days before considering it definitive.

What gains can you realistically expect?

These ranges are indicative: results depend on your card model, chip quality, and case airflow. Recent cards like the RTX 5060, 5060 Ti, and 5070 generally respond very well to undervolting, as their energy efficiency is already high.

Common mistakes to avoid

• Trying to go too fast: going straight to 800 mV without steps almost always leads to instability.
• Testing for only 5 minutes: some crashes only appear after 30 minutes or in specific scenes.
• Forgetting the startup profile: without it, your settings will disappear on reboot.
• Confusing undervolt with underclock: the goal is to maintain an almost identical frequency while lowering voltage, not to throttle the card.
• Neglecting the rest of the cooling: a poorly ventilated case will limit your gains—also check your airflow.

In summary

Undervolting offers the best effort/benefit ratio for a gaming PC: 30 minutes of setup and testing are enough to achieve a cooler, quieter, and more energy-efficient machine, without sacrificing performance. It's also an excellent way to extend the lifespan of your graphics card by reducing its daily thermal stress.

And if you prefer to start with a healthy, well-ventilated base, DSGate's gaming PCs assembled in France are built with careful airflow and components selected for reliability—an ideal foundation for applying this tutorial.