How to Overclock Your GPU

Overclocking your GPU raises the graphics card’s core and memory clock speeds beyond the factory setting, adding frame rate after stability testing keeps temperatures and voltages within safe limits. The work is done in MSI Afterburner, raising one clock at a time in small steps and testing each step in a benchmark before moving on. This guide lists the tools you need, explains what an overclock changes, then walks the procedure in order: raise the power limit and fan curve, increase the core clock and test, increase the memory clock and test, run a long stability check, and save the profile. It closes on undervolting, which trades a little performance for a cooler and quieter card and is the better choice for many people.

What Do You Need to Overclock a GPU?

Overclocking a GPU needs an overclocking tool, a benchmark, and a temperature monitor before any clock is raised. The items are listed below in the order each is first used:

• MSI Afterburner adjusts the core clock, memory clock, power limit, voltage, and fan curve on Nvidia, AMD, and Intel cards.
• A benchmark such as Unigine Heaven, Superposition, FurMark, or 3DMark applies a steady GPU load to expose instability at each step. The wider options are in the guide to benchmarking your PC.
• An on-screen temperature monitor tracks the core, hotspot, and memory junction temperatures during testing.
• Adequate case airflow and cooling keeps the core under 83C as clock speed and power rise.
• A current GPU driver keeps behavior stable and clock reporting accurate while you overclock.

An overclock suits a system that is already tuned, so a card pinned at its thermal limit gains little until cooling improves. Confirm the card runs cool and stable first; the relationship between heat, clock speed, and stability is measured in the guide to monitoring CPU and GPU temperatures.

What Is GPU Overclocking?

GPU overclocking raises the graphics card’s core and memory clock speeds above the factory setting, increasing the operations the GPU performs per second and adding frame rate. A GPU runs at a rated clock by default, and an overclock pushes that higher within power and thermal limits. An overclock adjusts three values:

• The core clock sets the speed of the GPU’s processing units and directly affects rendering throughput and frame rate.
• The memory clock sets the speed of the video memory and affects bandwidth-limited workloads, mostly at high resolution.
• The power limit caps how much power the GPU draws, which determines how long the card sustains its boosted clock.

A GPU overclock adds about 5 to 10 percent more frame rate, and up to roughly 15 percent on a strong card with good cooling, according to results from benchmark tools such as 3DMark. The core clock contributes most of that gain and the memory clock adds a few percent more, mainly at 4K. Raising the clock without raising the power limit produces little gain, because the GPU throttles to stay inside its power budget. An overclock cannot fix stutter that comes from elsewhere, which the guide to what causes FPS drops traces to CPU bottlenecks, thermal throttling, and background load.

How Do You Overclock a GPU Step by Step?

The procedure raises one clock at a time in small steps and tests each step, so a crash always points at the clock that caused it. Work through the phases in this order:

• Install and baseline. Install MSI Afterburner with the RivaTuner overlay and a benchmark, then run the benchmark at stock to record a baseline score and confirm the card is stable.
• Raise the power and temperature limits. Drag the power limit slider to maximum, and the temperature limit too if it is linked, so the GPU can hold higher clocks instead of throttling.
• Set a steeper fan curve. Open the fan curve editor and make the fans ramp earlier to keep the core under 83C under load.
• Increase the core clock. Raise the core clock by 25 MHz, apply, and run the benchmark for several minutes. Repeat while stable; back off 25 to 50 MHz at the first artifact or crash.
• Increase the memory clock. With the core stable, raise the memory clock in 50 to 100 MHz steps and test each. Back off when artifacts appear or the score drops.
• Stress test and save. Run a 30 to 60 minute loop plus a few real games, then save the stable clocks to a profile and enable apply at startup.

Each phase below states its goal and gives the exact steps. The sections that follow expand the two most error-prone phases, the core clock and the memory clock, where the small-step rule matters most.

How Do You Raise the Power Limit and Fan Curve?

Raising the power limit and setting a steeper fan curve give the overclock the power headroom and cooling it needs to hold higher clocks. A higher power limit lets the GPU sustain boosted clocks, and an earlier fan ramp keeps the core below its throttle point. Follow these steps:

1. Drag the Power Limit slider to its maximum, which lets the GPU draw more power to sustain higher clocks.
2. Raise the Temperature Limit if the slider is linked, keeping the core target below 83C.
3. Open the fan curve editor and set the fans to rise earlier, holding the core cooler under load.
4. Apply and run the benchmark to confirm the core stays under 83C before you touch the clocks.

The power limit is the single change that most enables a stable overclock, because the GPU otherwise throttles to its power budget before it reaches the new clock. Holding the core under 83C prevents thermal throttling, which the temperature monitoring guide tracks across the core, hotspot, and memory junction sensors.

How Do You Increase the Core Clock?

Increasing the core clock in small steps and testing each one finds the highest stable core speed without crashing the GPU. The core clock raises rendering throughput most directly, so it is tuned first in small steps with a benchmark between each. Follow these steps:

1. Raise the Core Clock by 25 MHz in MSI Afterburner and apply the change.
2. Run the benchmark for several minutes, watching for artifacts, flickering, or a crash.
3. Raise the core clock another 25 MHz if stable, repeating the test after each increment.
4. Back off by 25 MHz to 50 MHz when artifacts or a crash appear, settling on the last stable value.

How Do You Increase the Memory Clock?

Increasing the memory clock after the core is stable adds bandwidth that helps high-resolution and memory-bound games. The memory clock raises video memory bandwidth, so it is tuned second in larger steps with testing between each. Follow these steps:

1. Raise the Memory Clock by 50 MHz to 100 MHz in MSI Afterburner and apply the change.
2. Run the benchmark and watch for artifacts, which memory instability shows as texture corruption or flicker.
3. Continue raising the memory clock in steps if stable, testing after each increment.
4. Back off when artifacts appear or the score drops, since memory error correction lowers performance before a crash.

Video memory includes error correction that retries failed operations, so memory pushed too far lowers the benchmark score before it crashes, unlike a core overclock that crashes outright. A memory overclock that raises the clock but lowers the score has passed its stable limit, so backing off restores both stability and performance.

How Do You Test Stability and Watch for Artifacts?

A long stability test confirms the overclock holds under sustained load before you rely on it for gaming. A short benchmark can pass while a long session fails as temperatures climb, so an extended test validates the final clocks. Follow these steps:

1. Watch for visual artifacts such as flickering textures, colored dots, or geometry errors that signal instability.
2. Run a 30 to 60 minute benchmark loop to test the overclock under sustained heat.
3. Test in several real games, since some titles stress the GPU differently than a benchmark does.
4. Back off the core or memory clock by 15 MHz if artifacts or a crash appear during the long test.

Artifacts warn of an unstable clock before a full crash, so backing off at the first sign prevents driver resets and corrupted frames. A crash that closes the game or resets the driver means the overclock has exceeded the stable limit. Watching temperature throughout, with the temperature monitoring guide, confirms the core stays under 83C as the session runs.

Should You Overclock or Undervolt Your GPU?

Overclocking trades heat and noise for a few percent more frame rate; undervolting trades a little of that performance for a cooler and quieter card. They tune the same voltage-frequency curve from opposite ends, and for many people undervolting is the better default:

To undervolt, press Ctrl+F in MSI Afterburner to open the voltage-frequency curve editor, pick a frequency the card already holds, pin it to a lower voltage (the sweet spot for most cards sits near 875 mV to 950 mV), then flatten the curve above that point and test in real games. A correct undervolt drops the core temperature by roughly 5C to 15C and cuts 30 W to 100 W of power, usually with no frame-rate loss. Save the stable result to a profile and enable apply at startup so it loads with Windows.

Last Thoughts on Overclocking Your GPU

Overclocking your GPU adds frame rate through an ordered procedure: install MSI Afterburner and a benchmark, raise the power limit and fan curve, increase the core clock in small 25 MHz steps, increase the memory clock in 50 to 100 MHz steps, watch for artifacts, run a long stability test, and save the profile. The rule that carries the whole process is to move in small steps and test for stability every time, because a card’s stable ceiling varies even within the same model. The reward is a real but modest gain of roughly 5 to 10 percent, and a software overclock is safe because the card throttles or crashes before it takes damage.

For many people undervolting is the smarter move, since it delivers most of the benefit cooler and quieter at close to stock speed. Either way, keep the core under 83C and confirm a stable result with a long stress test before you trust it in games. Readers can continue with the PC tutorials hub for related step-by-step procedures.

Key Takeaways:

• Raise the power and temperature limits first, or the GPU throttles to its power budget and the overclock gains nothing.
• Increase the core clock in 25 MHz steps and the memory clock in 50 to 100 MHz steps, testing each step in a benchmark.
• Back off at the first artifact or crash; a too-high memory clock lowers the score before it crashes, so a dropped score is a warning.
• Keep the core under 83C and confirm the overclock with a 30 to 60 minute stress test plus real games before you rely on it.
• Expect a modest gain of about 5 to 10 percent, up to roughly 15 percent on a strong, well-cooled card.
• Undervolting is the cooler and quieter alternative and often delivers most of the same benefit at close to stock speed.

Frequently Asked Questions (FAQs)