These are private debug symbols for build 8128 sent out by Microsoft under the request of Advanced Micro Devices; Intel-related symbols (such as mcupdate_GenuineIntel.pdb) were not provided within this drop.

The contents of the drop are as follows:
8128_amd64chk_symbols\acpi.pdb
8128_amd64chk_symbols\amdppm.pdb
8128_amd64chk_symbols\hal.pdb
8128_amd64chk_symbols\mcupdate_AuthenticAMD.pdb
8128_amd64chk_symbols\mssmbios.pdb
8128_amd64chk_symbols\ntkrnlmp.pdb
8128_amd64chk_symbols\storport.pdb

Original archive filename: 8128_amd64chk_symbols.zip