Intel DP55SB Product Guide - Page 18
USB 2.0 Support, Serial ATA Support, SATA Drive Activity LED - drivers
UPC - 735858206006
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Intel Desktop Board DP55SB Product Guide USB 2.0 Support The Desktop Board provides 13 USB 2.0 ports (eight ports routed to back panel connectors, four ports routed to two onboard headers, and one port routed to an onboard vertical connector). USB 2.0 ports are backward compatible with USB 1.1 devices. USB 1.1 devices will function normally at USB 1.1 speeds. USB 2.0 support requires both an operating system and drivers that fully support USB 2.0 transfer rates. Disabling Hi-Speed USB in the BIOS reverts all USB 2.0 ports to USB 1.1 operation. This may be required to accommodate operating systems that do not support USB 2.0. Serial ATA Support Intel Desktop Board DP55SB supports six onboard 3.0 Gb/s Serial ATA (SATA) channels via the PCH. The board also provides one backpanel 3.0 Gb/s external SATA (eSATA) channels via a discrete SATA controller. The Desktop Board includes a SATA drive activity indicator (a blue LED) shown in Figure 3. Figure 3. SATA Drive Activity LED 18