Kilpatrick then brought up something especially awkward. He reminded Lendacky of a comment that the engineer had made back in 2020, confirming that a Ryzen 3700X, a consumer CPU, “should support TSME.” In a later 2025 comment in the same discussion, Lendacky again recommended using TSME, while noting that the motherboard BIOS provider had to expose the option. So there it was, AMD’s own engineer, years earlier, acknowledging the feature working on exactly the kind of lower-end chip now stripped of it, proving that Ryzen support was not some fantasy users invented.
So this engineer is openly recommending it.
is an email response stating that TSME “is a security feature only applied to PRO CPUs as part of AMD PRO Technologies,” notably the first time the company has publicly stated such a restriction
amd itself never stated anything at all, one way or another.
where two AMD engineers eventually responded: Tom Lendacky, an AMD fellow software engineer, and Mario Limonciello, an AMD senior principal software engineer.
Interestingly, neither engineer appeared to have a clear answer for why the feature had disappeared.
This sort of implies both knew of it and didn’t know of the specifics of the removal. But it isn’t clear.
Reading it again I may havw over-remembered though, to be fair. Not as high level as I thought.
This does also mention that amd didn’t “advertise rhe feature only for pro cpus”. They never specified it at all, so all there was to go on was the actual cpu behavior, which did support it on all lineups. With a feature mentioned and not stated to only be present on some lineups, it’s also reasonable to expect it present on all cpus.
It is from a different article going deeper into it:
https://www.tomshardware.com/pc-components/cpus/amd-silently-removes-memory-encryption-from-consumer-ryzen-cpus-leaving-users-unaware-that-they-may-be-vulnerable-security-feature-vanishes-after-newer-agesa-firmware-amd-engineers-go-radio-silent-when-pressed-about-the-change
So this engineer is openly recommending it.
amd itself never stated anything at all, one way or another.
This sort of implies both knew of it and didn’t know of the specifics of the removal. But it isn’t clear.
Reading it again I may havw over-remembered though, to be fair. Not as high level as I thought.
This does also mention that amd didn’t “advertise rhe feature only for pro cpus”. They never specified it at all, so all there was to go on was the actual cpu behavior, which did support it on all lineups. With a feature mentioned and not stated to only be present on some lineups, it’s also reasonable to expect it present on all cpus.