memory board vs computer storage

memory board and computer storage both are nouns.

Word	Noun	Adjective	Verb	Adverb
memory board	Yes	No	No	No
computer storage	Yes	No	No	No

As nouns, memory board and computer storage are synonyms defined as:

Other synonyms of memory board include computer memory, memory, storage, store.

memory board (noun)	computer storage (noun)
an electronic memory device	an electronic memory device