How much does undervolting your GPU save?
Pick a power limit and see the money saved per year and the performance you keep.
Your result
Keep about 96% of your speed and save €33.63 a year. A good trade: most players will not notice the difference.
Power vs speed
| Limit | Gaming draw | Speed kept | Saved / year |
|---|---|---|---|
| 100% | 382 W | 100% | €0.000 |
| 90% | 344 W | 98% | €16.82 |
| 80% | 306 W | 96% | €33.63 |
| 70% | 267 W | 93% | €50.45 |
| 60% | 229 W | 90% | €67.26 |
How it works
- Start from typical draw
We take your card’s typical gaming power and scale it by the power limit you choose.
- Estimate speed kept
Performance falls much more slowly than power. We use a curve fitted to published tests (about 95% speed at 78% power).
- Turn watts into money
Watts saved ÷ power supply efficiency × hours × your price gives the yearly saving.
Tips
- Easiest method: lower the power limit slider in MSI Afterburner (NVIDIA) or AMD Software’s Tuning tab.
- A voltage-curve undervolt can keep even more speed, but test stability in several games.
- Combine with a frame-rate cap at your monitor’s refresh rate for the biggest saving.
Questions people ask
Is undervolting or power limiting safe?
Yes. Running a graphics card at lower power or voltage does not harm it. The worst case is a game crash if the voltage is too low, which you fix by backing the setting off. A power limit set in software is fully reversible.
How much performance do I lose at 80% power?
Usually only a few percent. Cards ship far past their most efficient point, so the last 20% of power buys very little speed. Our estimate is approximate; results vary by game and card.
Does undervolting also reduce noise and heat?
Yes. Less power means less heat, so fans spin slower and the room stays cooler, which also helps in summer.
Related tools
- Does a new graphics card pay for itself?See how much electricity a more efficient card saves and how long the upgrade takes to pay back.
- Your PC is a heater. What is that worth?In winter PC heat replaces some heating. In summer the air conditioning has to remove it.
- What does leaving your PC on cost?Idle, sleep or shut down: see the yearly cost of each when your PC is not in use.
Popular graphics cards
- GeForce RTX 5070
- GeForce RTX 5080
- Radeon RX 9070 XT
- GeForce RTX 4070 Super
- GeForce RTX 4090
- GeForce RTX 3080
- All graphics cards
Prices: Eurostat, nrg_pc_204, EIA, Ofgem, ElCom. Updated 31 October 2026. How we calculate.