How to Undervolt Your GPU for Lower Temps and Stable FPS

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Undervolting your GPU lowers the voltage it draws at a given clock speed, which means lower temperatures, less fan noise, and often more stable FPS because the card stops thermal-throttling. This guide walks through a safe undervolt using MSI Afterburner’s curve editor.

How to Undervolt Your GPU for Lower Temps and Stable FPS

Undervolting isn’t risky like overvolting — worst case, a too-aggressive setting just crashes the driver and resets. You lose nothing by trying.

Why undervolt at all

  • Lower temperatures — often 10°C or more, extending component life.
  • Quieter fans since the card runs cooler.
  • Higher sustained clocks — a cool GPU holds boost longer instead of throttling, which can raise average FPS.
  • Lower power draw and less coil whine.

What you need

  • MSI Afterburner (works on most GPU brands) — see our MSI Afterburner guide.
  • A way to monitor temps and clocks (Afterburner’s on-screen display).
  • A stress test or demanding game to validate stability — see benchmarking tools.

Step 1 – Open the curve editor

  1. Launch MSI Afterburner.
  2. Press Ctrl + F to open the Voltage/Frequency curve editor.
  3. This graph shows the clock the GPU runs at each voltage point.

Step 2 – Pick a target

A safe starting approach:

  1. Note your card’s typical boost clock and the voltage it hits under load.
  2. Choose a voltage point lower than stock (e.g. around 875–950 mV) to target.
  3. Decide the clock you want the card to hold at that voltage.

Step 3 – Flatten the curve

  1. In the curve editor, click the point at your target voltage (e.g. 900 mV).
  2. Drag it up to your desired clock.
  3. Hold Shift and select every point to the right of it, then drag them down so the curve flattens after your target voltage.
  4. Click Apply (the checkmark).

This caps the GPU at your chosen voltage while keeping a high clock.

Step 4 – Test for stability

  1. Run a stress test and a couple of demanding games for 20–30 minutes.
  2. Watch for driver crashes, artifacts, or black screens — if they happen, your clock is too high for that voltage.
  3. If it crashes, lower the clock at your target voltage slightly and retest.
  4. When it’s stable, save the profile and set Afterburner to apply it at startup.

Step 5 – Confirm the gains

Compare before/after temperatures, fan speed, clocks, and average FPS. A good undervolt runs cooler and quieter with the same or better performance.

Undervolting your GPU is a low-risk way to run cooler, quieter, and often faster in sustained sessions. Flatten the voltage/frequency curve at a sensible voltage, stress-test for stability, and save the profile — your card will thank you.

Exact voltages and clocks vary by GPU and silicon quality; apply the same logic: target a lower voltage, hold a high clock, and validate with a stress test.

Frequently asked questions

Does undervolting a GPU reduce performance?

Done correctly, no. You hold the same clocks at lower voltage, so performance stays equal while power draw, temperature and fan noise drop. Many cards even boost higher because they run cooler.

Is undervolting safe for my GPU?

Yes. You are running the card below its stock voltage, not above it. The worst case of going too low is a crash that resets on reboot, with no hardware damage.

Does undervolting void the warranty?

No. It is a software setting in tools like MSI Afterburner and leaves no permanent change — a driver reinstall or settings reset returns the card to stock.

How much cooler does an undervolted GPU run?

Five to fifteen degrees Celsius is typical, along with a meaningful drop in power draw. Quieter fans and steadier boost clocks are the usual result.