Intel Core i-11000: BIOS compatibility only with graphics card

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    Computer systems with the Core-i-11000 “Rocket Lake” desktop processors launched in March can not simply boot within the traditional BIOS mode. Subsequently, for instance, no antiquated working techniques will be put in on it or older, bootable {hardware} diagnostic instruments will be began. This step Intel announced in 2017: As early as 2020, there ought to solely be new processor platforms that, as so-called UEFI Class three techniques, solely use the UEFI mode – with out compatibility with the traditional BIOS.

    For the built-in UHD-700 graphics unit of the 11th generation Core i processors Intel not offers a video BIOS (VBIOS). As an alternative, a extra fashionable graphics output protocol driver (GOP) is used because the successor within the UEFI, which allows sooner booting and is much less restricted in measurement. Nonetheless, in distinction to VBIOS, which continues to be executed as 16-bit code, the GOP driver not works with the Compatibility Help Module (CSM). UEFI techniques can subsequently not boot within the traditional BIOS mode.

    Within the case of UEFI Class three techniques, there isn’t a downward compatibility with the BIOS.

    (Picture: UEFI.org)

    The initially deliberate time for the change to UEFI Class three was not chosen arbitrarily. With the End of support for Windows 7 on January 14th, 2020 the final working system that was not but suitable with the Graphics Output Protocol fell away.

    The CSM within the Asrock Z590 Excessive can’t be activated with out a graphics card.

    (Picture: c’t)

    In follow, on present LGA1200 mainboards with a Sequence 500 chipset from Asus and Asrock, the boot mode within the firmware setup with out a graphics card can’t be switched from UEFI to CSM. This works with MSI boards, however on the next restart an error message follows that no VBIOS was discovered and the boot mode was reset to UEFI. In an effort to begin computer systems with Rocket Lake processors through CSM, you additionally want a graphics card whose firmware accommodates a VBIOS.


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    More from c't magazine


    Up till now it was left to the PC and board producers whether or not they offered the firmware of their techniques with a CSM for BIOS compatibility. The variety of notebooks and full PCs that solely boot through UEFI has elevated considerably in recent times.


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