MS now appear to be saying that the release version of Windows 11 will only run on Intel chips from 2017 onwards (8th generation & above) and AMD chips from 2019 onwards
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The pre-release version runs fine on the older chips (as Ceedy has already proven), so it seems it's a conscious decision from MS to persuade folk to upgrade hardware. I don't think they're doing themselves any favours to put it mildly.
Cliff