Memory chip and Silicon chip

Memory chip noun - A RAM microchip that can be plugged into a computer to provide additional memory.

Silicon chip and memory chip are semantically related. In some cases you can use "Silicon chip" instead a noun phrase "Memory chip".

Silicon chip noun - Electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuit.

Memory chip and silicon chip are semantically related. Sometimes you can replace phrase "Memory chip" with "Silicon chip", this phrases are similar.