01.Introduction: Risk vs Reward
GPU overclocking today is very safe. Modern cards have safety locks that will shut down the PC before anything burns out. The worst that usually happens is a video driver restart.
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02.Chapter 1: Preparation
Step-by-Step
1. Download MSI Afterburner (from the official MSI site or Guru3D). Beware of fake sites!
2. Download MSI Kombustor or Unigine Heaven to test stability.
3. Open Afterburner and increase Power Limit and Temp Limit to the maximum allowed. This tells the card: "You can use as much power as you need."
03.Chapter 2: Overclocking (Core Clock)
Increase your Core Clock (MHz) in increments of 10.
Run Kombustor for 1 minute.
If it doesn't crash and no artifacts appear (colored streaks on the screen), increase it by another 10.
Generally, +100MHz is safe. +150MHz is lucky. +200MHz often causes crashes.
Once you find the limit, back off about 10MHz for a safety margin.
04.Chapter 3: Overclocking (Memory Clock)
GDDR6 memory can handle quite a bit of overclocking.
Start with +200MHz. Work your way up by 100MHz at a time.
Many cards can handle +500MHz or even +1000MHz.
Signs of memory errors: Flashing black blocks or corrupted textures. If you see this, lower the clock.
A1.Chapter 4: Undervolting (The 'Magic' Technique)
Undervolting maintains the same clock speed (performance) while using less voltage.
The result: A cooler card (-10°C) and quieter fans.
1. Press Ctrl + F to open the voltage curve.
2. Choose a voltage (e.g., 900mV).
3. Move the point for that voltage up to your desired frequency (e.g., 1900MHz).
4. Flatten the curve after that point (a straight horizontal line).
5. Apply. Your card will now run at 1900MHz locked at 900mV, instead of jumping to 1050mV and heating up.
A2.Chapter 5: Fan Curve
Don't leave it on Auto if your card runs hot.
In Settings > Fan: Enable the user-defined software auto-fan control.
Set it to 100% fan speed when the temp hits 80°C.
Configure 0% (Zero Frozr) below 40°C for total silence on the desktop.
A3.Chapter 6: OSD (Monitoring)
Want to see FPS and temperature in-game?
Settings > Monitoring.
Click on "GPU Temperature" and check "Show in On-Screen Display".
Do the same for "Framerate" and "RAM Usage".
This will automatically trigger RivaTuner.
A4.Chapter 7: Startup (Boot with Windows)
Only enable the "Startup" button (Windows Logo) AFTER testing your overclock for days across multiple games.
If you enable Startup on an unstable setting, your PC may crash as soon as it boots (Boot Loop).
If this happens, enter Safe Mode and uninstall Afterburner.
Chapter 8: Laptops
On laptops, the Power Limit is usually locked by the BIOS.
You can generally only adjust the Core and Memory clocks.
Undervolting is EVEN MORE IMPORTANT on laptops to avoid Thermal Throttling.
Chapter 9: NVIDIA vs AMD
Afterburner works on both. However, for AMD cards, the "Adrenalin" software already has these features built-in under the Tuning tab and is often better to use.
Chapter 10: 2D/3D Profiles
You can save profiles (1 through 5).
Create Profile 1 (Stock/Silent) for web browsing.
Create Profile 2 (Overclock) for gaming.
Use hotkeys to switch between them quickly.
Don't do it Manually.
Voltris Optimizer automates this entire guide and removes Windows delay in seconds.
Written by a verified expert
Douglas Felipe M. Gonçalves
Expert in Windows system optimization with years of experience in hardware diagnostics, kernel tuning, and advanced technical support. Founder of Voltris and developer of the Voltris Optimizer.
Meet the Voltris TeamConclusion and Next Steps
By following this guide on MSI Afterburner: Safe Overclock and Undervolt Guide, you are equipped with the verified technical knowledge to solve this issue with confidence.
If you still have difficulties after following all steps, our expert support team is available for a personalized remote diagnosis. Every system is unique and may require a specific approach.