Microsoft: Only the Latest Version of Windows Will Support New CPU Generations (windows.com)
Joe_Dragon sends news from Microsoft about how the company will support Windows now and in the future. The company says PCs built with Intel's Skylake chip, and other new architectures in the future, will require the latest version of Windows for support. This doesn't take effect right away; Windows 7 and 8.1 will be supported on older chips until their planned end-of-life dates, in 2020 and 2023 respectively. They'll also be supported on a list of current Skylake devices for the next 18 months. After that, only the latest version of Windows will support integration between the operating system and new CPU features. "For example, Windows 10 will be the only supported Windows platform on Intel's upcoming 'Kaby Lake' silicon, Qualcomm's upcoming '8996' silicon, and AMD's upcoming 'Bristol Ridge' silicon." Microsoft also mentioned that for new supported systems, the company will "ensure all drivers will be on Windows Update with published BIOS/UEFI upgrading tools." The submitter adds, "Putting BIOS/UEFI updates in to the Windows 10 auto- / forced-update system may open Microsoft to paying $600-$1,000+ to replace broken laptops. If Windows tries to update BIOS/UEFI at a bad/risky time (like during power instability in a big storm), it could lead to an update loop or worse."
Skylake chips support some new power management features that allow the chip to throttle based on load far more efficiently than older chips. Microsoft is not adding special support to that to Windows 7 for example. The chip will still work on Windows 7 but not all features will work.
If you use a Debian install from 5 years ago it also won't support any of those new power management features and they are not going to backport those features. You can install a new kernel and a new version of some of the power management libraries, that will probably involve rebuilding a lot of user space and in the end you are probably going to break something else. What you would have to do is just use a distribution new enough to support all the features on your new processor.
OSX is going to do EXACTLY the same thing. Apple is not going to backport skylake power management to a 5 year old version of OSX and all the risks that could have. They are going to take the newest version, work out the details on that, validate it and support it.
Intels and AMDs new processors will continue to work on older Windows and Linux versions just like before. It is just that Microsoft has officially announced they are not going to backport new processor features to older operating system versions.
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