- noun a high-speed cache memory that is fitted to the computer’s motherboard and supplies data to the processor faster than the main memory to improve performance.
- A memory cache which utilizes a memory bank between the CPU and main memory. This contrasts with an L1 cache, which is built right into the CPU. LI cache is faster, but smaller than L2 cache, while L2 cache is still faster than the main memory. Also called level 2 cache, external cache, or second-level cache.