further resurch has confirmed they are indeed c die samsung but be warned i quote samsung these chips are not compatable with x99 style platform and are designed for low powerd laptops not above 1.2v very poor product
8Gbit Rev.C ("c-die")
Characteristics: Negative scaling has been observed above 1.2V on ambient, but did 3466 18-20-20 (tested using a SODIMM + adapter by /u/brutuscat2). Full-size stick with four x16 ICs did DDR4-4500 at loose timings on intel, and booted nearly 4000 on ryzen 1K.
Found on: Only OEM sticks so far.
Platform preferences: Issues reported on X99. Seems to behave well on AMD, and Intel *lake.
Recommended for: Probably pretty low-power, so laptops I guess? Lots of potential for frequency validation.