GPU overclock gain estimator
Enter your frame rate and the clock speed before and after an overclock. See the estimated FPS gain, how much of the clock increase turns into frames, and what the extra power does to efficiency.
How the estimate works
An overclock raises the speed your graphics card runs at, but frames per second rarely rise by the same amount. Part of every frame is spent waiting on memory, the processor, the game engine or the display, and none of those get faster when you lift the core clock. The estimator takes your boost clock before and after, works out the percentage gain, and multiplies it by a scaling figure that says how much of that gain you expect to see as frames. The default of 60 percent is a sensible starting point for games that are limited by the GPU.
The tool then compares the frame gain with the extra power you enter. A card that uses 15 percent more power for a 5 percent frame gain is clearly less efficient, even though it is faster. Seeing both numbers together helps you decide whether the overclock is worth the heat, noise and electricity.
Typical overclock results at a glance
These examples show how a clock gain turns into frames at different scaling values. Your own results will vary by game and card.
| Clock gain | 40% scaling | 60% scaling | 80% scaling |
|---|---|---|---|
| 3% | 1.2% | 1.8% | 2.4% |
| 5% | 2.0% | 3.0% | 4.0% |
| 8% | 3.2% | 4.8% | 6.4% |
| 10% | 4.0% | 6.0% | 8.0% |
Getting a realistic scaling figure
The most useful thing you can do is measure it. Run the same repeatable scene, such as a built-in benchmark, at your stock settings and again after the overclock, then divide the percentage change in frame rate by the percentage change in clock speed. That ratio is your own scaling figure for that game. Enter it above and the estimate will match your hardware.
Memory matters too. Raising the memory clock often helps more at high resolutions, where bandwidth is the limit, while a core clock gain helps more at lower resolutions. If your processor is the bottleneck, neither will change frame rate much. Check this with the bottleneck checker before you spend time tuning.
Is overclocking still worth it?
Modern graphics cards already boost close to their limits using their own power and temperature rules, so there is usually less headroom than there was a decade ago. Many players find a modest memory offset and a raised power limit give most of the safe gains, and that the card is happier running slightly below its limits for quieter operation. A small overclock is a fun hobby and can add a few frames, but upgrading the card or turning on upscaling usually gives far more.
Always change one setting at a time, test for stability, and stop if you see artefacts, crashes or very high temperatures. This tool is an estimator, not a guarantee, and overclocking can void a warranty depending on the maker.
How to use the gPU overclock gain estimator
- Run a repeatable benchmark at stock settings and note the frame rate and boost clock.
- Apply your overclock, then check the new boost clock in a monitoring tool while the game is running.
- Enter both clocks, your stock frame rate and the extra power you measured.
- Compare the estimate with a second benchmark run and adjust the scaling value until they match.
- Check performance per watt before keeping the setting.
Common mistakes to avoid
- Reading the clock from a menu instead of while the game runs, which can show a different boost value.
- Judging gains from a single short run. Use the same scene several times and average the results.
- Ignoring temperatures. A hot card lowers its own clocks and cancels part of the gain.
Related tools and guides
Keep tuning with: DLSS and frame generation estimator, CPU and GPU bottleneck checker, PSU wattage calculator, electricity cost calculator, RTX 5090 power and thermal limits.
Frequently asked questions
How much FPS does a GPU overclock add?
Usually a few percent. A clock gain of 5 percent often becomes a 2 to 4 percent frame rate gain, depending on the game and what limits it. The estimator turns your own clocks and scaling into an expected figure, but only a benchmark on your card gives the real number.
Does overclocking the memory help more than the core?
It can, at high resolutions and with ray tracing, where memory bandwidth limits the card. At lower resolutions the core clock matters more. Many people raise both modestly and keep whichever setting shows the best measured gain in the games they play.
Is it safe to overclock a graphics card?
Small offsets within the limits set by the driver and your cooling are widely done, but there is always some risk. Raise settings gradually, watch temperatures and stability, and stop at the first sign of artefacts or crashes. Check whether your warranty allows it.
Why did my overclock give almost no extra FPS?
Frame rate was probably limited by something other than the GPU core, such as the processor, memory, a frame cap or V-Sync. Lowering the resolution or raising settings can shift the limit back to the graphics card. Test in a GPU-heavy scene.
What is performance per watt?
It compares the frames you get with the power you use. If an overclock raises frames by 5 percent but power by 15 percent, performance per watt falls. A more efficient setup runs cooler and quieter, so efficiency is worth tracking alongside raw speed.
Independent site. Not affiliated with or endorsed by NVIDIA, AMD or Intel. Product names are trademarks of their owners.