Bugs In AMD Ryzen fTPM Are Reportedly Causing Stuttering Issues In Windows 11
Most motherboards do not include a physical TPM, but modern systems can generally emulate it. AMD refers to this feature as fTPM, with the "f" standing for "firmware". As a result, when Microsoft announced that Windows 11 would require TPM support, a lot of people shrugged, turned on fTPM, and made the jump to the latest version of Windows.
The specific issue at hand seems to be an intermittent stuttering bug. Essentially, a few times per day, the machine will undergo a short period of lagging and stuttering, not unlike that caused by interrupt conflicts back in the day. Applications will hang up, audio will crackle and pop, and even the mouse cursor will stutter and hitch when moving across the screen. It's concerning to see in person.
To be clear, this isn't necessarily a Windows 11 problem—it also happens in Windows 10 when the fTPM is in use. Many of these users have reported that disabling fTPM resolved the problem, but that's not necessarily an option for Windows 11 users whose operating system is already set up to make use of the feature. It is possible to run Windows 11
It's not completely obvious whether this is a fault in AMD's fTPM firmware implementation, a problem with Windows, or possibly just some incompatibility between the two. It's fairly unlikely that AMD's fTPM implementation saw much use before Windows 11's release, so this could have been an issue lurking in the background all along.
There's no real fix or workaround right now besides disabling the fTPM, but we'll make sure to report back if we hear anything from AMD or Microsoft.