this post was submitted on 27 Jun 2026
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There are four version of x86_64: v1, v2, v3, and v4.
RHEL 9 dropped support for anything prior to v3. That means RockyLinux doesn't cover it, either. AlmaLinux has support for v2 in version 10, but there's no way of knowing how long that will last.
Some binary packages are starting to drop support for earlier version. The latest numpy out of pip will not work on a v1 machine. You can sometimes use the system package manager's numpy to work around it, or constrain pip to use an older numpy. I don't know what else is lurking out there.
If you've got visions of taking a really old computer that you happened to max out on RAM back in the day and bringing it back to life there are surprises waiting for you.