Not sure if it's the specific thing you're thinking of, but AMD EPYC chips can be vendor locked and Dell EMC does this. They blow eFuses in the CPU so they'll o

Not sure if it's the specific thing you're thinking of, but AMD EPYC chips can be vendor locked and Dell EMC does this. They blow eFuses in the CPU so they'll only work with Dell motherboards with the correct code signature. https://www.servethehome.com/amd-psb-vendor-locks-epyc-cpus-for-enhanced-security-at-a-cost/ https://www.servethehome.com/amd-psb-vendor-locks-epyc-cpus-...