Addenda: Intel networking chips, so even in AMD or ARM systems this actually works (assuming that you have the correct OS and drivers/modules/support software).

Addenda: Intel networking chips, so even in AMD or ARM systems this actually works (assuming that you have the correct OS and drivers/modules/support software). Also, this isn't exclusive to Intel: most modern (server) NICs at least support TCXO-based timings, and some built for precision uses OCXO for even better precision.