What about ratail chips recognized as ''ES'' by CPU-Z even if they are and that this is a know issue like for CPU-Z 1.58 and AMD's FX-8150.
Same Chip, same system, same OS:
cpuz 1.58: shows ES
cpuz 1.58.7: shows retail
cpuz 1.59: shows retail
But unfortunately cpu-z 1.58.7 was on the wrong usb drive, so the validation has been done with 1.58 (that shows ES) and the CPU died, so no validation with cpuz 1.58.7