MSI Afterburner is the most widely used GPU utility in PC gaming — free, reliable, and packed with features that go far beyond basic monitoring. Whether you want to keep an eye on GPU temperature during a long session, or squeeze extra frames by overclocking your graphics card, this guide walks you through every feature you need to know.
What Is MSI Afterburner?
MSI Afterburner is a free GPU overclocking and monitoring utility developed by MSI and Guru3D. Despite the MSI branding, it works with virtually every GPU from NVIDIA and AMD — you don’t need an MSI graphics card to use it.
Its core features:
- Real-time GPU monitoring (temperature, clock speeds, VRAM usage, power draw)
- In-game overlay (OSD) to display stats without alt-tabbing
- GPU core and memory clock overclocking
- Voltage/frequency curve editor for advanced tuning
- Fan speed control with custom curves
- Benchmark recording and frame capture
Most importantly, it’s completely free and has been the standard tool for GPU management for over a decade.
How to Download and Install MSI Afterburner
- Search for “MSI Afterburner download” in your browser and navigate to the official MSI product page (msi.com). Avoid third-party download sites.
- Download the latest installer (v4.6.x as of 2026).
- Run the installer. It will offer to install RivaTuner Statistics Server (RTSS) alongside Afterburner. Always accept this — RTSS is what powers the in-game overlay. Without it, the OSD won’t appear.
- After installation, launch Afterburner from the Start menu or system tray. The main dial interface will show your GPU’s current clock speed, temperature, and load.
Note: Windows Defender sometimes flags the installer. This is a known false positive. Afterburner reads GPU hardware registers to display stats, which can trigger generic antivirus heuristics incorrectly.
Setting Up the Monitoring Overlay (OSD)
The OSD (On-Screen Display) shows a real-time stats panel inside any game. It’s one of Afterburner’s most useful features for diagnosing FPS drops and thermal issues.
Opening the OSD Settings
Click the Settings gear icon in Afterburner, then go to the Monitoring tab. This lists every metric Afterburner can track.
Choosing What to Display
For gaming, these are the most useful stats to enable in-game:
| Stat | Why It Matters |
|---|---|
| GPU Temperature | Spot thermal throttling before it crushes FPS |
| GPU Core Clock | Confirms boost clocks are sustaining at target speed |
| GPU Usage % | Tells you whether the GPU is the bottleneck |
| VRAM Usage | Warns when you’re approaching the VRAM limit |
| Framerate | Essential for live FPS monitoring |
| CPU Temperature | Catch CPU throttling in processor-bound games |
| RAM Usage | Spot memory pressure in open-world titles |
To activate a stat in the OSD: click the metric in the list → check Show in On-Screen Display → look for the small OSD icon to the right and enable it.
Toggling the Overlay In-Game
Press Ctrl+Shift+O (default) to toggle the overlay while in a game. You can remap this under Settings → On-Screen Display → “Toggle On-Screen Display” keybinding.
Understanding Your GPU Stats
Once the overlay is running, here’s what to look for:
GPU Temperature: Most modern GPUs are designed to boost up to 83–90°C. Sustained temperatures above 90°C suggest inadequate case airflow or a thermal pad that needs replacing. If your GPU consistently hits its temperature limit, it will thermally throttle — reducing clock speeds to protect the hardware, which directly hurts FPS.
GPU Core Clock: NVIDIA GPUs boost dynamically based on temperature and power headroom. If your GPU clock is constantly jumping (for example, hitting 2400 MHz then dropping to 1800 MHz), it’s likely power-limited or thermal-limited. AMD cards tend to stay more consistent.
GPU Usage %: If this sits below 85% during gameplay, your CPU may be the bottleneck. For a deeper breakdown of what each graphics setting actually taxes, see our PC game settings explained guide.
VRAM Usage: When VRAM usage exceeds your card’s capacity, the game begins spilling into system RAM — this causes severe hitching and stuttering. If you’re consistently hitting your VRAM ceiling, reduce texture quality or resolution scale.
How to Overclock Your GPU with MSI Afterburner
Important: Overclocking may void your GPU warranty and carries a small risk of instability or hardware damage at extreme settings. Always overclock in small steps and test stability after each change.
Step 1: Check Your Baseline
Before touching anything, run a 15-minute GPU stress test with FurMark, or play a demanding game while watching Afterburner. Note your maximum temperature, power usage, and baseline boost clock. This is your reference point.
Squeeze out more FPS with the settings in monitor cpu temperature.
Step 2: Unlock the Power Limit
In Afterburner’s main panel, drag the Power Limit slider to its maximum (usually 100% or slightly higher). Also drag Temp Limit to maximum. This removes soft throttle limits that can hold back boost clocks before you even start overclocking.
Step 3: Increase Core Clock
Click the padlock icon to unlock core clock adjustment if required. Increase the Core Clock (MHz) slider in +50 MHz increments. After each increase, click the checkmark to apply, then run a 10-minute gaming session or benchmark. Watch for:
- Visual artifacts (flickering pixels, corrupted geometry)
- Driver crash or black screen
- Increased stuttering
Most GPUs tolerate +100 to +200 MHz on the core clock. NVIDIA cards vary more card-to-card than AMD due to the silicon lottery.
Step 4: Increase Memory Clock
Memory clock overclocking often delivers bigger FPS gains than core clock, especially in VRAM-heavy games like open-world titles and high-resolution textures. Start with +200 MHz and increase in +100 MHz steps. Memory instability shows as white pixel dots (“snow”) or game crashes.
Step 5: Save Your Profile
Once you’ve found a stable overclock, click one of the numbered profile save slots (1–5) at the bottom of the Afterburner interface. Enable Apply overclocking at system startup under Settings → General to load it automatically every time Windows starts.
The Voltage/Frequency Curve Editor
For advanced users, Afterburner’s Voltage/Frequency (V/F) Curve Editor (open with Ctrl+F) lets you control the exact relationship between voltage and GPU clock speed.
Instead of a flat clock offset, the curve editor lets you:
- Flatten the top of the curve at a specific clock/voltage point for maximum efficiency
- Push a specific voltage point higher to raise maximum boost without increasing all voltages
- Undervolt to reduce heat and power draw while maintaining the same performance
The most popular NVIDIA approach: find the voltage point that corresponds to your GPU’s natural maximum boost (for example, 1875 MHz at 1025 mV on a mid-range card), then flatten all points above it to that same clock. This locks the boost without raising voltage — the card runs cooler and draws less power with identical performance.
AMD’s RX 7000 series also benefits from curve editing. Dropping the maximum voltage by 25–50 mV while maintaining stock clocks typically reduces temperatures by 5–8°C.
Fan Speed Control
Go to Settings → Fan and enable “Enable user defined software automatic fan control.” You’ll see a graph where you can draw a custom fan ramp.
A solid default gaming fan curve:
- 0% up to 40°C (silent at idle)
- 40% at 65°C
- 60% at 75°C
- 80% at 85°C
- 100% at 90°C
This keeps the GPU quiet during light use while ramping fans aggressively before temperatures get critical.
Typical Overclock Gains by GPU
Results vary by game and silicon quality, but here’s what you can reasonably expect from a well-tuned overclock:
| GPU | Core OC | Memory OC | Typical FPS Gain |
|---|---|---|---|
| RTX 4070 | +150 MHz | +500 MHz | 3–7% |
| RTX 3080 | +100 MHz | +400 MHz | 3–6% |
| RX 7800 XT | +100 MHz | +300 MHz | 4–8% |
| RTX 3060 | +150 MHz | +500 MHz | 4–7% |
| GTX 1660 Super | +100 MHz | +400 MHz | 3–6% |
Memory bandwidth-limited games (open world, high-res textures) benefit more from memory OC. Compute-limited titles (esports, older engines) respond better to core clock increases.
For a complete approach to improving game performance beyond overclocking, our PC game optimization guide covers OS tweaks, driver settings, and in-game configuration across every GPU tier.
Frequently Asked Questions
Is MSI Afterburner safe to use?
Yes. Afterburner has been developed by MSI in partnership with Guru3D since 2009. It’s used by tens of millions of gamers worldwide and is recommended by GPU manufacturers and PC hardware reviewers. The installer is signed and the software reads hardware registers — it does not make system-level changes without your input.
Does MSI Afterburner work on AMD GPUs?
Yes. Afterburner supports AMD RX 5000, 6000, and 7000 series GPUs as well as older cards going back to the HD 7000 series. AMD’s own Radeon Software offers similar overclocking features, but many users prefer Afterburner’s interface, RTSS overlay, and cross-brand consistency.
Does overclocking reduce GPU lifespan?
Conservative overclocking within stock power and voltage limits has a negligible impact on GPU lifespan. Aggressive voltage increases raise operating temperatures and stress the GPU die more significantly. If you’re sticking to clock offsets without increasing voltage, the risk is very low over typical gaming lifespans (5+ years).
Why doesn’t my OSD appear in-game?
RivaTuner Statistics Server (RTSS) must be running in the system tray — if it’s closed, the overlay won’t work. Also, exclusive fullscreen mode in some games can block the overlay. Switching to borderless windowed mode resolves this in most cases.
What’s a safe GPU temperature for gaming?
For most modern GPUs, up to 83°C is within the designed operating range. Temperatures consistently above 90°C indicate a cooling issue. Memory junction temperature (shown as “GPU Memory Junction Temp” on AMD cards) should stay below 110°C.
Sources
- MSI Afterburner — Official product page, MSI Global (msi.com)
- RivaTuner Statistics Server documentation — Guru3D (guru3d.com)
- TechPowerUp GPU-Z hardware database — techpowerup.com