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Item Description A LAN B USB ports C DVI-I connector D HDMI connector E USB ports F eSATA connector G USB ports H Rear surround I S/PDIF out (optical) J Center channel and LFE (subwoofer) K Line in L Mic in/side surround M Line out/front speakers Figure 9. Back Panel Connectors NOTE The back panel audio line out connector is designed to power headphones or amplified speakers only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output. Technical Reference 2.2.2 Component-side Connectors and Headers Figure 10 shows the locations of the component-side connectors and headers. Figure 10. Component-side Connectors and Headers Table 12 lists the component-side connectors and headers identified in Figure 10. Intel Desktop Board DH57DD Technical Product Specification Table 12. Component-side Connectors and Headers Shown in Figure 10 Item/callout from Figure 10 Description A Conventional PCI bus add-in card connector B PCI Express x1 add-in card connector C Front panel IEEE 1394a header D Front panel IEEE 1394a header E PCI Express x1 add-in card connector F Battery G PCI Express x16 add-in card connector H Processor core power connector (2 x 2) I Rear chassis fan header J Processor fan header K Front chassis fan header L Consumer IR receiver (input) header M Consumer IR emitter (output) header N Chassis intrusion header O Main power connector (2 x 12) P SATA connectors Q Intel Remote Assist PC header R Alternate front panel power LED header S Front panel header T Front panel USB header U Front panel USB header V Front panel USB header W Front panel USB header X Intel High Definition Audio Link header Y Serial port header Z S/PDIF header AA Front panel audio header Technical Reference 2.2.2.1 Signal Tables for the Connectors and Headers Table 13. Serial Port Header Pin Signal Name Pin Signal Name 1 DCD (Data Carrier Detect) 2 RXD# (Receive Data) 3 TXD# (Transmit Data) 4 DTR (Data Terminal Ready) 5 Ground 6 DSR (Data Set Ready) 7 RTS (Request To Send) 8 CTS (Clear To Send) 9 RI (Ring Indicator) 10 Key (no pin) Table 14. S/PDIF Header Pin Signal Name 1 Ground 2 S/PDIF out 3 Key (no pin) 3 +5V_DC Table 15. Front Panel Audio Header for Intel HD Audio Pin Signal Name Pin Signal Name 1 [Port 1] Left channel 2 Ground 3 [Port 1] Right channel 4 PRESENCE# (HD Audio/AC ’97 detect) 5 [Port 2] Right channel 6 [Port 1] SENSE_RETURN 7 SENSE_SEND (Jack detection) 8 Key (no pin) 9 [Port 2] Left channel 10 [Port 2] SENSE_RETURN Table 16. Front Panel Audio Header for Passive AC ’97 Audio Pin Signal Name Pin Signal Name 1 MIC 2 AUD_GND 3 MIC_BIAS 4 PRESENCE# (HD Audio/AC ’97 detect) 5 FP_OUT_R 6 AUD_GND 7 NC (no connect) 8 KEY (no pin) 9 FP_OUT_L 10 AUD_GND Intel Desktop Board DH57DD Technical Product Specification Table 17. Intel HD Audio Link Header Pin Signal Name Pin Signal Name 1 BCLK 2 Ground 3 RST# 4 DVDD IO 5 SYNC 6 Ground 7 SDO 8 3.3 V DVDD CORE 9 SDI0 10 +12 V 11 SDI1 12 Key (no pin) 13 Not connected 14 3.3 V DUAL 15 Not connected 16 Ground Table 18. Front Panel USB Headers Pin Signal Name Pin Signal Name 1 +5 VDC 2 +5 VDC 3 D4 D5 D+ 6 D+ 7 Ground 8 Ground 9 KEY (no pin) 10 No Connect Table 19. SATA Connectors Pin Signal Name 1 Ground 2 TXP 3 TXN 4 Ground 5 RXN 6 RXP 7 Ground Table 20. Chassis Intrusion Header Pin Signal Name 1 Intruder# 2 Ground Technical Reference Table 21. Processor (4-Pin) Fan Header Pin Signal Name 1 Ground 2 +12 V 3 FAN_TACH 4 FAN_CONTROL Table 22. Front and Rear Chassis Fan Headers Pin 4-Wire Support Pin 3-Wire Support 1 Ground 3 Ground 2 Fan power 2 Fan power 3 Fan tach 1 Fan tach 4 Fan control N/A N/A Table 23. Intel Remote PC Assist Technology Header Pin Signal Name 1 RPAT# 2 Ground Table 24. Back Panel CIR Emitter (Output) Header Pin Signal Name 1 Emitter out 1 2 Emitter out 2 3 Ground 4 Key (no pin) 5 Jack detect 1 6 Jack detect 2 Table 25. Front Panel CIR Receiver (Input) Header Pin Signal Name 1 Ground 2 LED 3 NC 4 Learn in 5 5 V standby 6 VCC 7 Key (no pin) 8 CIR input Intel Desktop Board DH57DD Technical Product Specification 2.2.2.2 Add-in Card Connectors The board has one PCI Express 2.0 x16 connector. This connector supports simultaneous transfer speeds of up to 8 GB/s of peak bandwidth. 2.2.2.3 Power Supply Connectors The board has the following power supply connectors: • Main power – a 2 x 12 connector. This connector is compatible with 2 x 10 connectors previously used on Intel Desktop boards. The board supports the use of ATX12V power supplies with either 2 x 10 or 2 x 12 main power cables. When using a power supply with a 2 x 10 main power cable, pins 11, 12, 23, and 24 must remain unconnected. • Processor core power – a 2 x 2 connector. This connector provides power directly to the processor voltage regulator and must always be used. Failure to do so will prevent the board from booting. CAUTION If a high power (75 W or greater) add-in card is installed in the PCI Express x16 connector, that card must also be connected directly to the power supply. ...