Beginners to PC building and tuning are often advised to stay away from BIOS settings. Even though modern motherboards have built-in security mechanisms, carelessly changing BIOS settings can cause serious problems and potentially brick your system. However, if you’re curious about the BIOS and want to learn more, this guide will help you understand some important options and prepare you for your first foray into the BIOS.
How to enter PC BIOS: Boot Priority
If you’ve built your own PC, you may have already entered the BIOS to change the boot priority. The Boot Priority setting lets you choose which storage device your computer will attempt to boot from first. The device with the lowest number has the highest priority. This is particularly useful if you need to boot from a USB drive to install an operating system.
For users with UEFI boot mode, you may have noticed the BBS Priorities section of the hard drive. This is where you can switch between drives with different boot loaders. If you’re setting up a dual-boot system or switch operating systems frequently, you’ll be familiar with these settings.
Secure Boot: Protection and Compatibility
Secure Boot is a critical feature designed to protect your system. system malware. It uses digital signatures to verify the authenticity of firmware, protecting your PC from rootkits and other malicious software. Microsoft has made Secure Boot mandatory for Windows 11. We recommend keeping it enabled for most users. However, if you’re installing an operating system other than Windows 11, Secure Boot may prevent installation and you’ll need to disable it.
Virtualization: How to Expand Your PC’s Capabilities
Virtualization allows you to divide your PC processing power and resources in virtual machines. This is useful for running multiple operating systems without installing them on the main system. Virtualization is also beneficial for security as it isolates each virtual machine, allowing you to experiment safely.
To use virtualization, you must enable CPU virtualization in your BIOS. Depending on your motherboard, this setting may be called VT-x (Intel), AMD-V (AMD), or SVM. For advanced users running Linux-based platforms such as Proxmox, you will need to enable IOMMU to configure PCIe passthrough, allowing virtual machines to access the CPU. GPU and other PCI Express devices.
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Overclocking: Increase performance with caution
Overclocking can increase CPU and RAM performance, but it also results in higher temperatures and potentially shorter lifespans for these components. If you’re ready to overclock, focus on the ratio of the CPU (clock speed) and the CPU core voltage (the power sent to the CPU). Increasing the voltage can help you increase the clock speed, but it also increases the temperature.
To overclock RAM, you can adjust the frequency, timings, and voltages of the DRAM. Beginners should consider using the automatic overclocking settings for the CPU and XMP/EXPO options for the memory, which are reliable and maintain system stability.
Resizable Bar: Improved GPU performance
A useful setting available on modern motherboards is Resizable BAR. This feature allows the processor to access all of the GPU’s VRAM, which improves frame rates. You can find it in the PCIe settings, usually under the PCI subsystem options. Enabling Resizable BAR can improve performance, especially for those with Intel Alchemist graphics cards.
Fan Control: Managing System Cooling
While the BIOS allows you to configure fan curves to manage your system’s cooling, using a utility like Fan Control gives you more customization options without the risk of changing critical BIOS settings. This software allows you to adjust fan speeds based on temperature sensors, ensuring your system stays cool and quiet.
Should I change the BIOS settings?
If you’re not confident about modifying BIOS settings, there’s no need to rush. For the average user, enabling virtualization and Resizable BAR are the most beneficial options. Most users won’t need to change Boot Priority or Secure Boot settings, and will be able to enjoy good gaming performance without overclocking.
Conclusion
Understanding BIOS settings can improve your computer experience, but it’s important to proceed with caution. This guide provides a starting point for exploring the BIOS, from managing boot options to enabling advanced features like virtualization and Resizable BAR. Always make sure you understand the implications of any changes you make, and remember that for many users, the default BIOS settings are sufficient for everyday use.