Undervolt GPU: The Complete Guide to Reducing Heat and Noise

Is your graphics card working hard while gaming? Does your PC turn your desk into a space heater—especially unpleasant in the middle of summer? There's a free, reversible software manipulation that can reduce your GPU's power consumption, temperature, and noise without sacrificing performance: undervolting. Here's how to do it, step by step.

What exactly is undervolting?

Each graphics chip receives an electrical voltage (expressed in millivolts) to operate at a given frequency. Manufacturers intentionally apply generous voltages: these ensure that 100% of the chips produced, even those that fared less well in the silicon lottery, remain stable. As a result, the vast majority of cards receive more voltage than necessary.

Undervolting involves reducing this voltage while maintaining a high frequency. Since power consumption increases approximately with the square of the voltage, even a moderate reduction produces significant gains:

• Reduced power consumption by 10 to 25% depending on the card and game.
• Lower temperatures by 5 to 12 °C, extending component lifespan.
• Quieter fans, as they have less heat to dissipate.
• Stable, or even slightly better, performance: less heat means less thermal throttling, thus better sustained frequencies over time.

Unlike overclocking, undervolting poses no hardware risk: at worst, an overly aggressive setting causes a driver crash, and a restart puts everything back in order.

What you'll need

• MSI Afterburner (free, works with all card brands, not just MSI).
• A monitoring tool: Afterburner's overlay (RivaTuner) or HWiNFO64 to track voltage, frequency, temperature, and power consumption.
• A demanding game or benchmark to test stability: 3DMark, Cyberpunk 2077, or any recent game that loads the GPU to 100%.
• 30 to 60 minutes of patience.

Note for Radeon users: For AMD, everything is done directly in the Adrenalin driver (Performance → Tuning), without third-party software. The logic remains identical to what follows.

Step 1: Record your original values

Before touching anything, launch your test game for about ten minutes and note the reference values: GPU frequency under load, associated voltage, temperature, and power consumption. On a recent NVIDIA card, you'll typically see a voltage of 1,000 to 1,100 mV for the maximum frequency.

These numbers will serve as a comparison point to measure your gains—and as a safety net if you want to revert.

Step 2: Open the curve editor

In MSI Afterburner, press Ctrl + F to open the voltage/frequency curve editor. Each point represents a frequency (vertical axis) associated with a voltage (horizontal axis). By default, the curve gradually rises to the maximum voltage.

The principle of undervolting: choose a lower voltage point and assign it a high frequency, then flatten the curve beyond that point. The card will never seek higher voltages.

Step 3: Build your curve

Proven method, point by point:

• Choose a reasonable target voltage to start: 950 mV is a good starting point for most NVIDIA cards.
• On the curve, select the point corresponding to 950 mV and raise it to the frequency your card originally reached (e.g., 2,700 → 2,750 MHz on an RTX 5060 Ti), or slightly below.
• Select all points to the right of 950 mV (drag with the mouse) and flatten them to the same frequency level—or use the L key on the target point to lock the voltage.
• Click Apply (the checkmark) in Afterburner's main window.

The curve should resemble a slope that rises to 950 mV, then a perfectly horizontal plateau beyond that.

Step 4: Test stability

Launch your game or benchmark for at least 20 to 30 minutes. Monitor three things:

• Stability: No crashes, no black screens, no visual artifacts (abnormal colored dots or triangles).
• Sustained frequency: It should stick to your plateau value.
• Temperature and power consumption: This is where you'll see your gains.

If the driver crashes or the game closes: no big deal. Restart, reopen Afterburner, and either increase the target voltage by 25 mV (975 mV) or lower the plateau frequency by 50 MHz. Test again.

If everything is stable, you can try to go further: 925 mV, then 900 mV, retesting at each step. Each card is unique—some hold 875 mV without flinching, others drop below 950 mV.

Step 5: Make the setting permanent

Once your profile is validated across several games and sessions:

• Save it in one of Afterburner's 5 profile slots (floppy disk icon then number).
• Activate "Apply at Windows startup" (Windows icon in Afterburner) so the setting reloads automatically.

Keep in mind that a major driver update can reset the curve: check your profile after each major installation.

What gains can you realistically expect?

These values vary depending on the card model, silicon quality, and case ventilation, but the order of magnitude is representative of what most users report.

Mistakes to avoid

• Validating a setting after 5 minutes of testing: Some instabilities only appear after a long session or in specific games. Test extensively.
• Touching memory voltage: Undervolting concerns only the GPU core. Leave video memory at its original settings.
• Copying someone else's curve: Two copies of the same model can have very different tolerances. Forum values are a starting point, not gospel.
• Confusing undervolt and power limit: Lowering the "Power Limit" slider also reduces power consumption, but at a greater sacrifice of performance. Undervolting is more refined and effective.

Conclusion

Undervolting is one of the best effort/benefit optimizations available on a gaming PC: an hour of adjustments for a cooler, quieter, and less power-hungry card, with no measurable performance loss. It's also entirely reversible: one click on "Reset" in Afterburner and your card returns to its original behavior.

Want a machine already designed for good cooling? DSGate gaming PCs assembled in France are built with well-ventilated cases and careful cable management to promote airflow—a healthy foundation even before any software adjustments.