4 страницы, всего еррат 21 штука. Это была 7-ая. https://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/6th-gen-x-series-spec-update.pdf
SKZ7
Under complex micro-architectural conditions, short loops of less than 64 instructions that use AH, BH, CH or DH registers as well as their corresponding wider register (e.g. RAX, EAX or AX for AH) may cause unpredictable system behavior. This can only happen when both logical processors on the same physical processor are active.
Implication:
Due to this erratum, the system may experience unpredictable system behavior
Workaround:
It is possible for the BIOS to contain a workaround for this erratum.
Status:
For the Steppings affected, see the Summary Tables of Changes