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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.
2.5 1.8 3.3 Yes 10 PRO 4 2 TiB (2048 GiB) 20 20 3.3 PRO Duo 32 [29] 20 20 3.3 PRO-HG Duo 32 [30] 30 (actual; [31] theoretical: 60 [32]) 30 (actual; [31] theoretical: 60 [32]) 3.3 Micro (M2) 16 [33] 32 20 20 1.8 and 3.3 xC 2 TiB (2048 GiB) 60 60 3.3 xD: 512 MiB (0.5 GiB) 512 MiB (0.5 GiB) 5 3 3.3 No 18 Type M 2 8 4 2.5 Type H 2 8 5 4 Type M+ 2 8 ...
Available servers can combine up to 48 U.2 NVMe solid-state drives. [46] U.3 (SFF-TA-1001) is built on the U.2 spec and uses the same SFF-8639 connector. Unlike in U.2, a single "tri-mode" (PCIe/SATA/SAS) backplane receptacle can handle all three types of connections; the controller automatically detects the type of connection used.
As a family of form factors, it defines specifications for the mechanical dimensions and electrical interfaces devices should have, to ensure compatibility between disparate hardware manufacturers. The standard is meant to replace the U.2 form factors for drives used in data centers. [1] EDSFF provides a pure NVMe over PCIe interface. One ...
2.5" with U.2 connector/AIC with PCIe x4 connector Intel SLL3D EAT39099 2500/2200 550/550 March 2017 Endurance: 30 DWPD/12.3PB to 41PB, Power Active Average: 18W [80] DC D4800X Cold Stream 375/750/1500 3D XPoint PCIe 3.0 NVMe 2.5" with U.2 15mm Intel 2400/2400 560/540 April 2019 Endurance: 30 DWPD/20.5PB to 82.1PB, Power Active Average: 20W to 25W
The M2 was followed by the professional-focused M2 Pro and M2 Max chips in January 2023. The M2 Max is a higher-powered version of the M2 Pro, with more GPU cores and memory bandwidth, and a larger die size. [5] In June 2023, Apple introduced the M2 Ultra, a desktop workstation chip containing two M2 Max units. [6]
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The M.2 standard allows module widths of 12, 16, 22 and 30 mm, and lengths of 16, 26, 30, 38, 42, 60, 80 and 110 mm. Initial line-up of the commercially available M.2 expansion cards is 22 mm wide, with varying lengths of 30, 42, 60, 80 and 110 mm. [3] [5] [14] [18] The codes for the M.2 module sizes contain both the width and length of a ...