Exact hardware requirements are still being evaluated. Our current expectation, as mentioned in the Quantumnet announcement, is that post-quantum baking will need somewhat more than the lightest Tezos setups, while staying within the range of readily available consumer hardware. So bakers running on minimal hardware may need to upgrade, but nothing specialized should be required.
A Raspberry Pi Zero 2W sits at the very light end, and we expect it is likely to be on the tight side for the new consensus keys. They need more memory and CPU than today’s keys, both to load and to sign quickly enough. The new manager keys are much less demanding.
