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ATTO ExpressSAS H1244 GT (ESAH-1244-GT0) is a low-profile 12Gb SAS/SATA host bus adapter with four external lanes through SFF-8644 and four internal lanes through SFF-8643. The adapter uses an x8 mechanical and electrical PCIe 4.0 connection and is backward compatible with 6Gb and 3Gb SAS/SATA devices. Includes the adapter and low-profile bracket. Three-year standard warranty.