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On Intel X299? DON'T update your BIOS to the new Cascade Lake-X UEFI

Intel's new Cascade Lake-X supported UEFI for X299 motherboards removes support for Kaby Lake-X due to limited room in the firmware

Shannon Robb | Oct 11, 2019 at 1:45 pm CDT (1 min, 21 secs time to read)

Intel has caught a lot of heat for the tactic of refresh after refresh of virtually similar CPUs. Just to making minuscule changes such as TIM to solder change and minor clock speed bumps as demonstrated by the initial X299 CPUs 7XXX to 9XXX series parts. Users have scoffed at the 14nm+++++++++++++++++++ as many have put it due to Intel struggling for years with the 10nm node.

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Well, today, Intel's complacency and practices may have come along to bite them in the ass thoroughly. As seen on Intel's own support article page the inclusion of the new microcode for support of the new Cascade Lake-X parts will remove compatibility for the dual channel X299 based bretheren, the Kaby Lake-X.

On Intel X299? DON'T update your BIOS to the new Cascade Lake-X UEFI 01 | TweakTown.com

Kaby Lake-X has moved to EOL awhile back, but it's worth putting out a PSA about this as many users have them in hand. If users are judicious about their BIOS updates, they could be met with a machine that no longer posts if they were to flash this firmware without knowing.

For any of you running the i5-7640X or the i7-7740X, you should avoid any future BIOS/UEFI updates without at least checking with your board manufacturer to ensure that the update will not remove compatibility with your CPU. I guess the moral of the story is that when you re-release the same CPU multiple times and fill the microcode accordingly, things break.

Last updated: Apr 6, 2020 at 04:44 pm CDT

NEWS SOURCE:intel.com
Shannon Robb

ABOUT THE AUTHOR - Shannon Robb

Shannon started his PC journey around the age of six in 1989. Now till present day, he has established himself in the overclocking world, spending many years pushing the limits of hardware on LN2. Shannon has worked with design and R&D on various components, including PC systems and chassis, to optimize the layout and performance for enthusiasts.

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