noun
internal cache
Computing term for a cache located inside a processor or device, as opposed to an external cache.
このCPUは内部キャッシュが大きいので、処理が速い。
This CPU has a large internal cache, so processing is fast.
外部キャッシュ means 'external cache', located outside the main processor, while 内部キャッシュ is built into the processor itself.
Compound of 内部 (ないぶ, 'internal') and キャッシュ ('cache'), a loanword from English.