Sdram - can be unregistered and registered.
So if your system uses udimm sdram, then you can add only another udimm sdram
(and it has to be of same type DDR, DDR2, DDR3 or DDR4).
Sdram - can be unregistered and registered.
So if your system uses udimm sdram, then you can add only another udimm sdram
(and it has to be of same type DDR, DDR2, DDR3 or DDR4).