memory chip vs silicon chip

memory chip and silicon chip both are nouns.

Word	Noun	Adjective	Verb	Adverb
memory chip	Yes	No	No	No
silicon chip	Yes	No	No	No

As nouns, silicon chip is a hypernym of memory chip; that is, silicon chip is a word with a broader meaning than memory chip:

memory chip: a RAM microchip that can be plugged into a computer to provide additional memory
silicon chip: electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuit

Other hypernyms of memory chip include chip, micro chip, microchip, microprocessor chip.

memory chip (noun)	silicon chip (noun)
a RAM microchip that can be plugged into a computer to provide additional memory	electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuit