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What exactly is UEFI with CSM boot mode? - Super User Under this question, I was told that "UEFI with CSM" is essentially BIOS mode It made me quite confused because what I've learnt over the years is far from that As per my observation, I think CSM is a special mechanism that allows previous "not canonical" UEFI OS to boot Here's my observation: The full name for UEFI with CSM is
boot - What is CSM option - Super User Enabling CSM Mode causes quantifiable performance degradation and should never be enabled (even when this answer was written, there were only a few distros lacking EFI boot, with all gaining EFI boot by the end of 2017 - Windows has supported EFI boot since Win7) Post-2017, CSM Mode serves no practical purpose beyond booting to a legacy
I am changing from CSM BIOS mode to UEFI BIOS mode. Is it safe? CSM Mode in Firmware (UEFI (Still being called as BIOS)) does not mean only CSM, it generally means UEFI + CSM With CSM On your system is capable of booting either Legacy mode (MBR) as well as UEFI Mode based on the bootloader, however generally UEFI takes priority
Should I install an OS using UEFI or BIOS (legacy CSM) boot mode? It may also be called something along the lines of "Enable UEFI Boot" or "Enable Legacy Boot", or mention the term CSM If there is no such option in your firmware, you're out of luck and have to stick with whatever you've got – on older machines that'll be the BIOS mode; there are also some newer machines (e g the Microsoft Surface line
How to switch MSI BIOS from UEFI mode to LEGACY+UEFI mode? 'BIOS CSM UEFI Mode' settings in BIOS will be changed to 'UEFI' Press any key or wait 3 seconds to continue see image below: background: computer1, 03rd Generation Processor, SpinRite 6 1 boots fine computer2, 12th Generation Processor, SpinRite 6 1 not booting Thus the USB stick (disk) is fine and
bios - CSM setting wont stay? - Super User CSM resets to "Disabled" every time? Here are some tricks I did (Gigabyte z690 UD): Set "Windows 10 Features" to "Other OS" Set "Secure Boot" to "Disabled" Disable the iGPU (cpu internal graphics) If "Secure-Boot" is not configurable (disabled and grayed-out), there are some features that force "Secure-Boot" to stay active
I have no UEFI Legacy BIOS boot option. What does that mean? it depend options offered by Bios firmware, Some Large integrators Like Lenovo unfortunately followed intel and Microsoft recommandations for security raisons and have deleted CSM Legacy Modules ! but mainly have Phoenix's Technologie Bioses you do have Megatrends one, i think it offers you more options Oddly Some modern models still have it
Rufus settings default settings confusing - Super User UEFI only: Partition scheme: GPT Target system: UEFI (non CSM) File system: FAT32 Legacy BIOS only: Partition scheme: MBR Target system: BIOS (or UEFI-CSM) File system: NTFS if using NTFS file system on GPT UEFI mode Is there any harm and what does it affect? What about when installing Windows to GPT UEFI system ?
motherboard - No video when enabling Compatibility Support Module (CSM . . . Apparently this is caused by UEFI boot and Compatability Support Module (CSM) needs to be switched on to allow it to work However when diving into the ASRock B460M Steel Legend UEFI Setup and switching on CSM I get no video output at all both on the Intel i5 10500 iGPU or the Nvidia Geforce 1050ti I have tried all of the video ports on both