Which memory is used for PC cacheSolution httpswwwgooglecoin

Which memory is used for PC cache?

https://www.google.co.in/url?sa=t&source=web&rct=j&url=https://en.m.wikipedia.org/wiki/CPU_cache&ved=0ahUKEwiD5_zY7_7OAhVERo8KHYPwA78QFggeMAE&usg=AFQjCNEvvAVS58u9vcR4pmtCHpwuo9MolA&sig2=rrc5JCmnTJ4QrCmZIh3Ibg