These are the updates, sorted by microcode update date, with a cursory look at the generation: sig 0x000406e3, pf_mask 0xc0, 2017-11-16, rev 0x00c2, size 99328

These are the updates, sorted by microcode update date, with a cursory look at the generation: sig 0x000406e3, pf_mask 0xc0, 2017-11-16, rev 0x00c2, size 99328 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=263907 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=263907 Skylake Core sig 0x000506e3, pf_mask 0x36, 2017-11-16, rev 0x00c2, size 99328 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=329443 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=329443 Skylake Core & Xeon sig 0x000306f4, pf_mask 0x80, 2017-11-17, rev 0x0010, size 17408 Haswell-EX sig 0x00040671, pf_mask 0x22, 2017-11-17, rev 0x001b, size 13312 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=263793 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=263793 Broadwell Core sig 0x000306d4, pf_mask 0xc0, 2017-11-17, rev 0x0028, size 18432 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=198356 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=198356 Broadwell Core sig 0x000306f2, pf_mask 0x6f, 2017-11-17, rev 0x003b, size 33792 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=198386 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=198386 Haswell Core & Xeon sig 0x00040661, pf_mask 0x32, 2017-11-20, rev 0x0018, size 25600 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=263777 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=263777 Crystal Well Core sig 0x00040651, pf_mask 0x72, 2017-11-20, rev 0x0021, size 22528 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=263761 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=263761 Haswell Core sig 0x000306c3, pf_mask 0x32, 2017-11-20, rev 0x0023, size 23552 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=198339 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=198339 Haswell Core & Xeon sig 0x000306e4, pf_mask 0xed, 2017-12-01, rev 0x042a, size 15360 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=198372 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=198372 Ivy Bridge Core & Xeon sig 0x00050654, pf_mask 0xb7, 2017-12-08, rev 0x200003c, size 27648 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=329300 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=329300 Skylake Core sig 0x00050662, pf_mask 0x10, 2017-12-16, rev 0x0014, size 31744 Broadwell sig 0x00050663, pf_mask 0x10, 2017-12-16, rev 0x7000011, size 22528 Broadwell sig 0x000706a1, pf_mask 0x01, 2017-12-26, rev 0x0022, size 73728 Gemini Lake sig 0x000906ea, pf_mask 0x22, 2018-01-04, rev 0x0080, size 97280 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=591594 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=591594 Coffee Lake Core sig 0x000806e9, pf_mask 0xc0, 2018-01-04, rev 0x0080, size 98304 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=526057 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=526057 Kaby Lake Core sig 0x000806ea, pf_mask 0xc0, 2018-01-04, rev 0x0080, size 98304 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=526058 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=526058 Kaby Lake Core sig 0x000906e9, pf_mask 0x2a, 2018-01-04, rev 0x0080, size 98304 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=591593 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=591593 Kaby Lake Core & Xeon sig 0x000906eb, pf_mask 0x02, 2018-01-04, rev 0x0080, size 98304 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=591595 http://www.cpu-world.com/cgi-bin/CPUID.pl?&SIGNATURE=591595 Coffee Lake I believe the oldest processors in the list are the Ivy Bridge sig=0x306e4. That includes E5-xxxx v2 Xeons, circa 2013.