QRG4 Plat 8260(B1) ES 24C 2.30Ghz 165W
note there are other 8260:
QPK5 Plat 8260(A0) QS 24C 2.30Ghz 165W DDR4-2933
QRB0 Plat 8260(B0) QS 24C 2.30Ghz 165W DDR4-2933
the QS will have the same stepping than the matching production unit.
HWinfo shows B1/L1/R1 if the DIE size is not reported.
With the AVX-512, due to the double register width of 512-bit, one opcode can do eight additions with double precision or 16 additions with single precision per clock. programs written with avx512 code is faster and shorter, but (today) not very portable to other platforms/processors.