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U.2

Not to be confused with U2. For other uses, see U2 (disambiguation).
SSDs with U.2 interface

U.2 (pronounced 'u-dot-2'[1]), using the port SFF-8639, is a computer interface standard for connecting solid-state drives (SSDs) to a computer. It covers the physical connector, electrical characteristics, and communication protocols.

It was developed for the enterprise market and designed to be used with new PCI Express drives (NVM Express) along with SAS and SATA drives. It uses up to four PCI Express lanes and two SATA lanes.

  1. ^ Burke, Steve. "U.2 vs. M.2 vs. SATA Express Interface Comparison & Speeds". Gamers Nexus. Archived from the original on 15 May 2023. Retrieved 13 January 2022.

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