How to Optimize the BIOS to Improve PC Performance

The BIOS is a fundamental component of your computer, but it is often overlooked after the initial installation. This is because it contains settings that, if not optimized, can compromise system performance without obvious indications. This guide is aimed at technical users who want to improve the efficiency of their PC by optimizing critical BIOS settings.

Optimizing the BIOS is useful for anyone who wants to get the most out of their hardware, especially if they use modern components such as recent GPUs, latest-generation CPUs, or high-speed RAM. Incorrect settings can lead to lower performance, overheating, and excessive noise.

• CSM and Legacy Boot: Block advanced features like Resizable BAR, essential for modern GPUs.
• Multi-Core Enhancement and Precision Boost Overdrive: Increase CPU power consumption and heat without improving performance.
• Fan curves: Pre-set profiles are not optimized for your specific system, causing excessive noise or high temperatures.
• XMP and EXPO: If not enabled, RAM may run at speeds lower than stated, negatively affecting performance.

By following this guide, you will learn how to correctly configure these settings to achieve better performance, reduce heat and noise, and ensure your hardware operates at its full potential.

Prerequisites

• Hardware:
  • A PC with BIOS access
  • A motherboard compatible with UEFI features
  • A modern GPU and Windows 10 or 11 operating system for Resizable BAR
  • An adequate CPU cooling system
  • RAM with XMP or EXPO profiles
• Software:
  • CPU-Z to check RAM frequency
  • Benchmark tools like Cinebench to test CPU performance
  • CPU temperature monitoring software

Step-by-step procedure to optimize the BIOS

At the end of this guide, you will have optimized your PC's BIOS settings to improve performance and reduce power consumption and noise.

1. Disable CSM and Legacy Boot

• Access your PC's BIOS.
• Find the "CSM" (Compatibility Support Module) option and disable it.
• Switch to pure UEFI mode.
• If necessary, convert the boot disk from MBR to GPT.
• Enable "Above 4G Decoding" and "Resizable BAR".
• Check that everything works by controlling the GPU control panel.

2. Adjust Multi-Core Enhancement and Precision Boost Overdrive

• Find the "Multi-Core Enhancement" option on Intel or the "Precision Boost Overdrive" limits on AMD.
• Set power limits close to the manufacturer's official specifications.
• On Ryzen, enable the "Curve Optimizer" with negative values to reduce voltage while maintaining boost frequencies.
• Run a benchmark with Cinebench or a stress test cycle to monitor temperatures.

3. Manually configure the fan curve

• Find the option to manually configure the fan curve in the BIOS.
• Set values based on your specific needs to achieve lower temperatures and reduced noise.
• Save the settings and verify that the fans work correctly at startup.

4. Enable XMP or EXPO for RAM

• Check the current RAM frequency in Task Manager or with CPU-Z.
• If the frequency does not match the one stated on the package, access the BIOS.
• Find the XMP option on Intel platforms or EXPO on AMD and enable it.

5. Save and test the changes

• Save a working BIOS profile before making changes.
• Proceed with one change at a time and verify the result with a quick benchmark.
• In case of problems, restore the saved profile.

VERIFICATION AND TROUBLESHOOTING: How to test if it works and what to do if it fails

After making changes to the BIOS, it is essential to verify that the settings have had the desired effect and to resolve any issues.

Performance verification

• Resizable BAR: Check the GPU control panel to verify that the Resizable BAR function is active. This should improve performance in games.
• RAM: Verify the current RAM frequency in Task Manager or with CPU-Z. It should match the speed stated on the package after enabling XMP or EXPO.
• Fans: Monitor fan temperatures and noise. Manual settings should result in lower temperatures and reduced noise.

Troubleshooting

• BIOS backup: If something does not work as expected, restore the BIOS profile saved before the changes.
• Gradual changes: Apply one change at a time and verify the result before moving on to the next. This makes it easier to identify any issues.
• Compatibility: Not all functions are available on all BIOS. If a change is not present, move on to the next one.

Educational summary and call to action

At the end of this guide, you will have learned how to optimize your PC's BIOS to improve performance without spending a euro. The four key areas analyzed will allow you to address critical aspects often overlooked.

• Fan curves: Configure them manually to optimize temperature and noise.
• XMP and EXPO: Enable RAM fast profiles to improve bandwidth and latency.

Every change is reversible: save a BIOS profile before starting and verify the results with quick benchmarks. Put yourself to the test and discover how your PC can perform better than you thought!