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adds optional 16-bit support, data rates of up to 20MBps, and new connectors (including the widely known 50-pin D-sub connector). SCSI extender card (Models 21X, 22X, 26X, 27X, 34X, 35X, 36X, 37X, 38X, 39X, 45X, 48X, 49X, B1G, B2G, B6G, B7G, C4G, C5G, C6G, C7G, C8G, C9G, D5G, D8G, D9G). Ultra320 uses a 16-bit bus and supports data rates of 320 MBps. It requires a new data-transfer mode with an 80 MHz free-running clock to eliminate ISI problems with the clock signal.Manufacturer: IBMManufacturer Part Number: 31P6952Manufacturer Website Address: www.ibm.comProduct Name: IBM / Adaptec Pro 2-SLOT PCI with U320 SCSI Extpansion ModuleProduct Type: ControllerController Type: SCSIDimension (WxHxD): 12.0x4.5x0.5Weight: 1.0