tag RAM : Computer Hardware Buyers’ Glossary

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tag RAM
Note two words tag RAM (Random Access Memory) , not tagram. A component of the L2 on-chip CPU (Central Processing Unit) cache. It tracks which items in regular memory are stored in the cache. It is not the data, but a list of the data. It is different from conventional memory in that is it is addressed associatively. You can ask it, are you holding a copy of location 0x00e8cfa00? and it can tell you instantly without needing to index into a giant bit table to keep track.
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