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. A GPU overclock increases clock speed in small steps using MSI Afterburner, with each increment tested in a benchmark for artifacts and crashes before the next. This article lists the tools required, then walks through the procedure in phases ordered from setup to a saved profile: install MSI Afterburner and a benchmark such as Unigine Heaven or 3DMark, raise the power limit and fan curve, increase the core clock in small steps and test, increase the memory clock and test, watch for artifacts and crashes and back off, run a long stability test, and save the profile.

The article keeps the GPU core under 83°C and notes undervolting as a lower-temperature alternative. Each phase states its goal and gives the exact steps. The result is a stable GPU overclock that adds 5% to 10% more frame rate while the core stays within a safe temperature range.

What You Need to Overclock a GPU

Overclocking a GPU requires an overclocking tool, a benchmark, and a temperature monitor before any clock is raised. The items required to overclock a GPU are listed below, in the order each is needed:

• MSI Afterburner adjusts the core clock, memory clock, power limit, and fan curve on any GPU brand.
• A benchmark such as Unigine Heaven, Superposition, or 3DMark applies a steady GPU load to test each overclock step.
• An on-screen temperature monitor tracks the core, hotspot, and memory junction temperatures during testing.
• Adequate case airflow and cooling keeps the core under 83°C as clock speed and power rise.
• A current GPU driver ensures stable behavior and accurate clock reporting during overclocking.

Overclocking adds frame rate on top of the settings changes in the guide to increasing FPS in games, so it suits a system already tuned through in-game settings and drivers. A GPU near its thermal limit gains little from an overclock, which makes the explanation of GPU cooling relevant before raising clocks on a hot-running card.

What Is GPU Overclocking?

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

• The core clock sets the speed of the GPU’s processing units, directly affecting rendering throughput and frame rate.
• The memory clock sets the speed of the video memory, affecting bandwidth-limited workloads 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 5% to 10% more frame rate, limited by the card’s power limit and cooling capacity, according to results from benchmark tools such as 3DMark. Raising the clock without raising the power limit produces little gain, since the GPU throttles to stay within its power budget. The relationship between heat, clock speed, and stability connects to the guide to monitoring CPU and GPU temperatures.

Install MSI Afterburner and a Benchmark

Installing MSI Afterburner and a benchmark provides the control and the test load required to overclock safely. MSI Afterburner adjusts the clocks and power limit, while a benchmark applies a steady load that exposes instability at each step. Follow these steps:

1. Download MSI Afterburner from the MSI site and install it with the RivaTuner Statistics Server for the on-screen overlay.
2. Install a benchmark such as Unigine Heaven, Unigine Superposition, or 3DMark to apply a sustained GPU load.
3. Enable the on-screen display in Afterburner to show clock speed, temperature, and usage during the benchmark.
4. Run the benchmark at stock settings to record a baseline score and confirm the GPU runs stable before overclocking.

MSI Afterburner works on Nvidia, AMD, and Intel graphics cards, exposing the core clock, memory clock, power limit, voltage, and fan controls in one interface. The baseline benchmark score sets the reference for measuring each overclock step’s frame rate gain and confirms the card is stable before any change.

Raise the Power Limit and Fan Curve

Raising the power limit and setting an aggressive fan curve gives the overclock the power headroom and cooling it needs to hold higher clocks. A higher power limit lets the GPU sustain boosted clocks, and a steeper fan curve keeps the core below its throttle temperature. 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 target below 83°C for the core.
3. Open the fan curve editor and set fan speed to rise earlier, holding the core cooler under load.
4. Apply the settings and run the benchmark to confirm the core stays under 83°C before raising clocks.

A higher power limit is the single change that most enables a stable overclock, since the GPU throttles to its power budget before reaching the new clock otherwise. A core temperature held under 83°C prevents thermal throttling, which the GPU cooling explanation covers through airflow, fan curves, and thermal paste.

Increase the Core Clock in Small Steps

Increasing the core clock in small increments and testing each step 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.

A stable core overclock typically lands between +75 MHz and +150 MHz depending on the card and its cooling, though the exact value varies between individual GPUs of the same model. Testing each step before the next isolates the failure point, so a crash identifies the unstable clock rather than leaving the cause unknown.

Increase the Memory Clock and Test

Increasing the memory clock after the core clock is stable adds bandwidth that benefits 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 produces 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.

Watch for Artifacts and Run a Stability Test

Watching for artifacts and running a long stability test confirms the overclock holds under sustained load before it is used for gaming. A short benchmark can pass while a long session fails as temperatures rise, 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-minute 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.
4. Back off the core or memory clock by 15 MHz if artifacts or a crash appear during the long test.

Artifacts indicate 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 exceeds the stable limit. Monitoring temperature throughout the test, covered in the guide to monitoring CPU and GPU temperatures, confirms the core stays under 83°C as the session runs.

Save the Profile and Consider Undervolting

Saving the stable overclock to a profile and applying it on startup makes the overclock persistent, while undervolting offers similar performance at lower temperatures. MSI Afterburner stores the final clocks in a profile, and undervolting lowers voltage to reduce heat. Follow these steps:

1. Save the stable clocks to a profile slot in MSI Afterburner once the long test passes.
2. Enable Apply at startup so the overclock loads automatically with Windows.
3. Open the voltage-frequency curve editor for undervolting by pressing Ctrl+F in MSI Afterburner.
4. Lower the voltage at a target frequency to cut temperature and power while holding clock speed.

Undervolting lowers the GPU’s voltage at a chosen frequency, reducing temperature by 5°C to 15°C and power draw while keeping clock speed near the overclock, according to results from MSI Afterburner’s curve editor. A cooler GPU sustains its boost clock longer, so undervolting sometimes matches an overclock’s frame rate at lower heat, which the GPU cooling explanation relates to thermal headroom.

Common Mistakes to Avoid

GPU overclocking destabilizes the system or damages performance when steps are skipped or clocks rise too fast. The mistakes that cause crashes or wasted effort are listed below:

• Raising the core clock in large jumps skips past the stable limit, causing crashes that obscure the true ceiling.
• Skipping the power-limit increase leaves the GPU throttling to its power budget, so the overclock produces no gain.
• Ignoring the memory score drop keeps an unstable memory clock that lowers performance through error correction.
• Testing only a short benchmark passes an overclock that fails during a long gaming session as heat rises.
• Overclocking a GPU near its thermal limit forces throttling, so cooling improvements precede the overclock.

An overclock that crashes only in long sessions points to heat or a marginal clock, so backing off and improving cooling resolves it. A GPU that already runs near 83°C at stock gains little from an overclock until the GPU cooling methods lower the temperature, which the temperature monitoring guide measures.

Key Takeaways

• Install MSI Afterburner and a benchmark to control clocks and apply a steady test load.
• Raise the power limit and fan curve first, which gives the overclock power and cooling headroom.
• Increase the core clock in 25 MHz steps, testing each increment for artifacts or crashes.
• Increase the memory clock in larger steps, backing off when the benchmark score drops.
• Run a 30-minute to 60-minute stability test and keep the core under 83°C.
• Save the profile and consider undervolting for similar performance at lower temperatures.

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 steps, increase the memory clock, watch for artifacts, run a long stability test, and save the profile. Undervolting offers similar performance at lower heat, and the core stays under 83°C throughout.

The overclock builds on the settings changes in the guide to increasing FPS in games, while cooling and temperature monitoring come from the GPU cooling explanation and the temperature monitoring guide. Readers can continue with the PC tutorials hub for related procedures.