memory board vs computer memory

memory board and computer memory both are nouns.

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

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

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

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