I forgot to summarize what this means. If you are planning a memory upgrade, use the last four digits of the existing memory to determine the compatible memory. This method should be more reliable than using the motherboard revision.
If the factory installed Samsung chips end in TC70 then you need the Micron MT48LC4M16A2-7E (or equivalent) memory.
If the Samsung memory ends with TC1L, then you can use the Mosel Vitelic V54C365164VCT8PC (i-Opener) memory. The Micron memory will also work in these machines. However, it is generally more expensive and will not make the machine any better than with the MV memory. Additionally, the same Micron memory in -75 and -8E speed ratings (and maybe slower) will likely work.
Electronics run on smoke, if you let the smoke out they won't work