Couldn't see a thread for this (apologies if there is) but the more exposure the better. You won't know if you have it unless you have fTPM enabled (so likely 1.2.0.3 Patch C or higher AGESA which had it enabled by default in prep for Windows 11 installations).
Some examples of what it looks like:
The main thread on the subject is here: https://linustechtips.com/topic/1353904-amd-ftpm-causing-random-stuttering/
There is also a 56 page discussion on the Lenovo forums for its laptops suffering the issue: https://forums.lenovo.com/t5/Gaming-Laptops/Legion-5P-15ARH05H-micro-stutters/m-p/5067079?page=1
Below I will try to give some info that I know to be correct:
1: Disabling fTPM fixes the issue completely.
2: People originally said buying a physical TPM also fixed it but then reports days later says it still happens.
3: The frequency can vary. People can go days without a stutter but unless fTPM is disabled it will happen. Usually they say 1-2 stutters a day.
4: There has been some massive confusion about how to disable fTPM from people saying "My ASUS BIOS doesn't allow it". This is simply not true. Every board manufacturer to my knowledge allows TPM to be disabled. For ASUS you go to Advanced > Trusted Computing > Security Device Support > Set to Disable. You do not actually have to be in the AMD fTPM configuration menu at all (which is where the confusion has arisen).
5: At first people were blaming Microsoft but as more users had the issue they also stated it happens on Linux. Putting the issue either in the hands of AMD or board manufacturers.
6: ASUS seems to be the most effected by this (but it is likely the most popular brand so hard to say). I've read reports from every brand.
7: Right now it's 50/50 on if this is a CPU hardware fault or software fault. The most damning evidence was something I found on the guru3d forums to support a faulty CPU:
"the forced/default tpm config in the latest bios is exposing it because of periodic validation colliding with a correctable bus error, which Ryzen cpu's have higher than the industry average of. since the ftpm fires a locking interrupt IO delays until the interrupt service succeeds."
Nobody else has a fix besides disabling fTPM (now no periodic validation will happen) so it doesn't show the hardware issue (giving credibility to this evaluation). However, a user that posted one of the above videos said he tried 3 different Ryzen CPUs in the same board and all had the same issue. It would be very unlucky to have 3 faulty CPUs.
8: Installing and running Windows 11 is still possible. You enable fTPM to install Windows 11 and after install, go into BIOS and disable it again. Updates still work. However, Valorant on Windows 11 will then not work as it requires TPM to be enabled.
Some examples of what it looks like:
The main thread on the subject is here: https://linustechtips.com/topic/1353904-amd-ftpm-causing-random-stuttering/
There is also a 56 page discussion on the Lenovo forums for its laptops suffering the issue: https://forums.lenovo.com/t5/Gaming-Laptops/Legion-5P-15ARH05H-micro-stutters/m-p/5067079?page=1
Below I will try to give some info that I know to be correct:
1: Disabling fTPM fixes the issue completely.
2: People originally said buying a physical TPM also fixed it but then reports days later says it still happens.
3: The frequency can vary. People can go days without a stutter but unless fTPM is disabled it will happen. Usually they say 1-2 stutters a day.
4: There has been some massive confusion about how to disable fTPM from people saying "My ASUS BIOS doesn't allow it". This is simply not true. Every board manufacturer to my knowledge allows TPM to be disabled. For ASUS you go to Advanced > Trusted Computing > Security Device Support > Set to Disable. You do not actually have to be in the AMD fTPM configuration menu at all (which is where the confusion has arisen).
5: At first people were blaming Microsoft but as more users had the issue they also stated it happens on Linux. Putting the issue either in the hands of AMD or board manufacturers.
6: ASUS seems to be the most effected by this (but it is likely the most popular brand so hard to say). I've read reports from every brand.
7: Right now it's 50/50 on if this is a CPU hardware fault or software fault. The most damning evidence was something I found on the guru3d forums to support a faulty CPU:
"the forced/default tpm config in the latest bios is exposing it because of periodic validation colliding with a correctable bus error, which Ryzen cpu's have higher than the industry average of. since the ftpm fires a locking interrupt IO delays until the interrupt service succeeds."
Nobody else has a fix besides disabling fTPM (now no periodic validation will happen) so it doesn't show the hardware issue (giving credibility to this evaluation). However, a user that posted one of the above videos said he tried 3 different Ryzen CPUs in the same board and all had the same issue. It would be very unlucky to have 3 faulty CPUs.
8: Installing and running Windows 11 is still possible. You enable fTPM to install Windows 11 and after install, go into BIOS and disable it again. Updates still work. However, Valorant on Windows 11 will then not work as it requires TPM to be enabled.
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