ASRock Z77 Pro4 Quick Installation Guide - Page 29
English, Onboard Headers and Connectors - sata ports
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2.11 Onboard Headers and Connectors Onboard headers and connectors are NOT jumpers. Do NOT place jumper caps over these headers and connectors. Placing jumper caps over the headers and connectors will cause permanent damage of the motherboard! Serial ATA2 Connectors (SATA2_2: see p.2, No. 17) (SATA2_3: see p.2, No. 14) (SATA2_4: see p.2, No. 13) (SATA2_5: see p.2, No. 18) Serial ATA3 Connectors (SATA3_0: see p.2, No. 15) (SATA3_1: see p.2, No. 16) (SATA3_A1: see p.2, No. 8) (SATA3_A2: see p.2, No. 9) SATA2_2 SATA2_5 SATA2_4 SATA2_3 These four Serial ATA2 (SATA2) connectors support SATA data cables for internal storage devices. The current SATA2 interface allows up to 3.0 Gb/s data transfer rate. These four Serial ATA3 (SATA3) connectors support SATA data cables for internal storage devices. The current SATA3 interface allows up to 6.0 Gb/s data transfer rate. SATA3_1 SATA3_0 SATA3_A2 SATA3_A1 English Serial ATA (SATA) Data Cable (Optional) USB 2.0 Headers (9-pin USB_6_7) (see p.2, No. 23) Either end of the SATA data cable can be connected to the SATA / SATA2 / SATA3 hard disk or the SATA2 / SATA3 connector on this motherboard. Besides six default USB 2.0 ports on the I/O panel, there are two USB 2.0 headers on this motherboard. Each USB 2.0 header can support two USB 2.0 ports. 29 ASRock Z77 Pro4 Motherboard