Disabling the integrated graphics processor, or iGPU, within your computer's BIOS is a common procedure for users seeking to install a dedicated graphics card or troubleshoot display issues. This hardware configuration change directs the system to ignore the on-board graphics chip, which is typically soldered directly onto the CPU, and prioritize the PCIe slot for video output. The process requires accessing the low-level firmware settings, often referred to as UEFI on modern systems, and navigating through specific menus to alter the initialization sequence.
Accessing the BIOS or UEFI Firmware
The first step in learning how to disable igpu in bios involves entering the system's setup utility. This firmware interface is separate from the operating system and is available immediately when you power on the device. To access it, you must interrupt the boot process by pressing a designated key repeatedly as the computer starts up. The specific key varies by manufacturer, but the most common options include Delete, F2, F10, or Esc. It is crucial to observe the initial splash screen, as the prompt for "Press [Key] to Setup" is often displayed for only a few seconds.
Identifying the Correct Key
If you miss the prompt or the system boots too quickly, you can usually trigger the entry from within your operating system. In Windows, you can hold the Shift key while selecting Restart from the Start menu. This boots you into an advanced recovery environment where you can navigate to Troubleshoot, then Advanced Options, and finally UEFI Firmware Settings. Once inside the firmware, the layout will depend on the brand and model of your motherboard or laptop, but the core settings related to integrated peripherals are generally grouped logically.
Locating Integrated Graphics Settings
Upon successfully entering the BIOS/UEFI, you need to locate the graphics configuration section. This is often found under headings such as Advanced, Chipset, Peripheral Configuration, or System Agent (SA) Configuration. The exact naming convention is not standardized, so you might encounter terms like Internal Graphics, iGPU, Onboard Graphics, or Intel UHD Graphics depending on whether you are using an Intel or AMD processor. The primary setting you are looking for will reference the iGPU and provide options such as Enabled, Disabled, or Auto.
Adjusting the Primary Display
When you find the relevant setting, which is usually labeled as iGPU, Internal Graphics, or DVMT Pre-Allocated, you will change its state to Disabled. It is important to note that simply turning off the iGPU is not always necessary; sometimes changing the Primary Display or Graphics Configuration to PCIe/PEG (PCI Express) or Add-in PCI Express is sufficient. This tells the system to look for a discrete GPU first during the Power-On Self-Test (POST). If you are installing a new card, ensure it is properly seated in the slot before saving changes.
Understanding the Implications
Disabling the iGPU is a significant change because it alters how the system renders visuals. While dedicated graphics cards handle the workload, the CPU will lack any hardware acceleration for display output if no other framebuffer is present. For this reason, it is strongly recommended to have a discrete graphics card physically installed before you disable the integrated unit. If you disable the iGPU and do not have a dGPU connected, the system may boot to a blank screen or fail to POST entirely, requiring you to clear the CMOS to restore the settings.
Verifying the Change
After saving the new configuration and exiting the BIOS, usually by selecting the Save and Exit option, the operating system will load the drivers for the newly detected hardware. To confirm the iGPU is disabled and the discrete card is active, you can check the Device Manager on Windows or the system information tools on Linux. In Windows, navigating to Display Adapters will show the dedicated card as the active adapter. The iGPU entry may still appear in the list, but it will be marked as disabled or unavailable.
