RTX 4070 Undervolt Guide: Lower Temps with the Same FPS

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The RTX 4070 is an efficient card to begin with, but it still ships with more voltage than most samples need to hold their boost clock. Undervolting it with MSI Afterburner shaves several degrees off load temps, drops power draw, and quietens the fans — all while keeping the same gaming FPS. This guide walks through the curve editor method tuned specifically for the 4070’s AD104 silicon.

RTX 4070 Undervolt Guide: Lower Temps with the Same FPS

The 4070 is one of the easier modern cards to undervolt — most samples hold full clocks at noticeably lower voltage.

Why undervolt an RTX 4070

  • Lower temps — commonly several degrees cooler under load, which helps small dual-fan cards in particular.
  • Lower power draw — a stock 4070 sits near its ~200W board limit in heavy games; an undervolt can pull it well under that.
  • Quieter fans and less chance of throttling in a warm case.
  • Steadier boost — a cooler GPU holds its clock longer, so sustained FPS stays consistent.

What you need

  • MSI Afterburner with RivaTuner Statistics Server — see our MSI Afterburner guide.
  • The on-screen overlay showing GPU clock, voltage, temperature, and power.
  • A stress test and a demanding game to confirm stability.

Step 1 – Open the curve editor

  1. Launch MSI Afterburner.
  2. Press Ctrl + F to open the Voltage/Frequency curve editor.
  3. Note where the card currently sits under load — a stock 4070 typically boosts in the low-to-mid 2700 MHz range up near 1.05–1.1V.

Step 2 – Pick a target point

The 4070 responds well to a moderate voltage cut:

  1. Find the 0.950V point on the curve.
  2. Aim to hold roughly 2700–2750 MHz at that voltage as a starting point.
  3. This is a test target, not a fixed number — every chip differs thanks to the silicon lottery, so be ready to adjust.

Step 3 – Flatten the curve

  1. Click the point at 0.950V and drag it up to about 2700 MHz.
  2. Hold Shift, select every point to the right of 0.950V, and drag them down so the curve flattens after your target.
  3. Click Apply (the checkmark). The card is now capped at 0.950V while holding a high clock.

If you want to be conservative on a first pass, start nearer 2700 MHz and push toward 2750 MHz only once you confirm stability.

Step 4 – Test for stability

  1. Run a GPU stress test for 15–20 minutes, then play a couple of demanding games for another 20–30 minutes.
  2. Watch for driver crashes, artifacts, or black screens — those mean the clock is too high for 0.950V.
  3. If it crashes, lower the clock at your target point by 15–30 MHz and retest. If it’s rock solid, you can try nudging the clock up slightly.
  4. Once stable, save the profile and enable “Apply overclocking at system startup”.

How to revert

If anything misbehaves, click the reset (circular arrow) icon in Afterburner to return to stock, or simply restart with the startup-apply option disabled. A driver reinstall also wipes the setting completely.

Expected results

Expect the 4070 to run several degrees cooler with a clear drop in board power and fan speed, at the same in-game FPS. Exact figures depend on your card, cooler, and case airflow — the consistent pattern is cooler and quieter for identical performance, not raw FPS gains.

Undervolting the RTX 4070 is a low-risk, ten-minute job that pays off every session: a flattened curve around 0.950V holds your clocks while cutting heat, power, and noise. Start at the suggested target, validate with a stress test, and save the profile once it’s stable.

Frequently asked questions

Is undervolting the RTX 4070 safe?

Yes. Undervolting runs the card below its stock voltage rather than above it, so there is no risk of hardware damage. The worst case from going too aggressive is a driver crash or black screen that clears on reboot, leaving the card exactly as it was.

How much can I undervolt an RTX 4070?

Most 4070s are happy holding their boost clock at around 0.950V, down from a stock peak near 1.05–1.1V. Some chips will run 2700–2750 MHz at that voltage; others need a touch more. The card's AD104 die undervolts very well, so meaningful savings are the norm.

Does undervolting the RTX 4070 lose FPS?

No, when done correctly. You hold the same clock at a lower voltage, so frame rates stay equal. Because the card runs cooler it often holds boost more steadily in long sessions, which can slightly raise average FPS.

What's a good undervolt for the RTX 4070?

A solid starting point is a flattened curve at roughly 0.950V targeting 2700–2750 MHz. Treat that as a test point, not a guarantee — validate it with a stress test and a few games before saving the profile.

Will undervolting void my RTX 4070 warranty?

No. It is a reversible software setting applied through MSI Afterburner with no permanent change to the card. Resetting Afterburner or reinstalling drivers returns the 4070 to stock behaviour.