12th gen Alder Lake appears unaffected. In his
latest video, MLiD talks about a source's theory that something is wrong with the how the cache connects to cores. Cache is where most of the changes are between the two microarchitectures: 1.25 MB L2/P-core in Alder Lake increased to 2 MB L2/P-core in Raptor Lake, 2 MB L2 per Gracemont cluster was doubled to 4 MB L2. An additional 6 MB of L3 cache is available to the top 8+16 Raptor Lake.
He also claims that an Intel source told him: "I can confirm that Raptor Lake was created in record time. The people who worked on it used to brag at lunch that they managed to go from Drawings to Product in just 11 months, and it still beat Zen 4...'
Basically, future product lines like Panther Lake were known before Raptor Lake, because Raptor Lake was an Alder Lake refresh with some actual changes created at the "last minute". But they did it too fast and it seems to be fucked up. It remains to be seen if Intel can suppress this disaster without needing to recall the CPUs, and if any of the more lucrative and numerous laptop CPUs are affected. At least, there are Raptor Lake-HX CPUs that shove the desktop chips into laptop BGA packages. For example, the Core i9-13980HX.