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Poor audio quality occurs if passive (non-amplified) speakers are connected to this output. 2.2.2 Component-side Connectors and Headers Figure 13 shows the locations of the component-side connectors and headers. Figure 13. Component-side Connectors and Headers Table 12 lists the component-side connectors and headers identified in Figure 13. Table 12. Component-side Connectors and Headers Shown in Figure 13 Item/callout from Figure 13 Description A PCI Express x16 add-in card connector (x4 electrical; x16 compatible) B Conventional PCI add-in card connector C PCI Express x16 add-in card connector (x8 electrical; x16 compatible) D PCI Express x1 add-in card connector E PCI Express x1 add-in card connector F PCI Express x16 bus add-in card connector G Rear chassis fan header 2 H PCI Express x1 add-in card connector I Rear chassis fan header 1 J 12 V processor core voltage connector (2 x 4 pin) K Processor fan header L Front chassis fan header 1 M Front chassis fan header 2 N Main power connector (2 x 12) O Front panel USB 3.0 connector P Chassis intrusion header Q SATA 6.0 Gb/s connectors through the PCH (blue) R SATA 6.0 Gb/s connectors through a Marvel 88SE9172 controller (gray) S PCI Express Full-/Half-Mini Card slot T Consumer IR receiver (input) header U Alternate front panel power/sleep LED header V Front panel connector W Front panel USB 2.0 connector (black) X Front panel USB 2.0 connector (black) Y Front panel USB 2.0 connector (orange high current charging) Z S/PDIF header AA Auxiliary fan header BB IEEE 1394a front panel connector CC Front panel audio connector 2.2.2.1 Signal Tables for the Connectors and Headers Table 13. IEEE 1394a Header Pin Signal Name Pin Signal Name 1 Data A (positive) 2 Data A (negative) 3 Ground 4 Ground 5 Data B (positive) 6 Data B (negative) 7 +12 V DC 8 +12 V DC 9 Key (no pin) 10 Ground Table 14. 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# (Dongle present) 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 15. Front Panel Audio Header for AC ’97 Audio Pin Signal Name Pin Signal Name 1 MIC 2 AUD_GND 3 MIC_BIAS 4 PRESENCE# 5 FP_OUT_R 6 AUD_GND 7 No_Connect 8 KEY (no pin) 9 FP_OUT_L 10 AUD_GND Table 16. S/PDIF Header Pin Signal Name 1 Ground 2 S/PDIF out 3 Key (no pin) 4 +5 V DC Table 17. SATA Connectors Pin Signal Name 1 Ground 2 TXP 3 TXN 4 Ground 5 RXN 6 RXP 7 Ground Table 18. Dual-Port Front Panel USB 2.0 Headers Pin Signal Name Pin Signal Name 1 +5 V DC 2 +5 V DC 3 D. 4 D. 5 D+ 6 D+ 7 Ground 8 Ground 9 KEY (no pin) 10 No Connect Table 19. Front Panel USB 3.0 Connector Pin Signal Name Description 1 Vbus Power 2 IntA_P1_SSRX. USB3 ICC Port1 SuperSpeed Rx. 3 IntA_P1_SSRX+ USB3 ICC Port1 SuperSpeed Rx+ 4 GND Ground 5 IntA_P1_SSTX. USB3 ICC Port1 SuperSpeed Tx. 6 IntA_P1_SSTX+ USB3 ICC Port1 SuperSpeed Tx+ 7 GND Ground 8 IntA_P1_D. USB3 ICC Port1 D. (USB2 Signal D.) 9 IntA_P1_D+ USB3 ICC Port1 D+ (USB2 Signal D+) 10 ID Over Current Protection 11 IntA_P2_D+ USB3 ICC Port2 D+ (USB2 Signal D+) 12 IntA_P2_D. USB3 ICC Port2 D. (USB2 Signal D.) 13 GND Ground 14 IntA_P2_SSTX+ USB3 ICC Port2 SuperSpeed Tx+ 15 IntA_P2_SSTX. USB3 ICC Port2 SuperSpeed Tx. 16 GND Ground 17 IntA_P2_SSRX+ USB3 ICC Port2 SuperSpeed Rx+ 18 IntA_P2_SSRX. USB3 ICC Port2 SuperSpeed Rx+ 19 Vbus Power 20 Key No pin Table 20. Chassis Intrusion Header Pin Signal Name 1 Ground 2 Intruder# Table 21. Processor, Front and Rear Chassis, and Auxiliary (4-Pin) Fan Headers Pin Signal Name 1 Ground (Note) 2 +12 V 3 FAN_TACH 4 FAN_CONTROL Note: These fan headers use Pulse Width Modulation control for fan speed. Table 22. 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 Table 23. Alternate Power LED Header Pin Signal Name 1 MAIN_COLOR_LED 2 KEY (no pin 3 ALT_COLOR_LED Table 24. PCI Express Full-/Half-Mini Card Connector Pin Signal Name Additional Signal Name Pin Signal Name 1 WAKE# 2 3.3 V 3 Reserved 4 GND 5 Reserved 6 1.5 V 7 CLKREQ# 8 Reserved 9 GND 10 Reserved 11 REFCLK- 12 Reserved 13 REFCLK+ 14 Reserved 15 GND 16 Reserved 17 Reserved 18 GND 19 Reserved 20 Reserved 21 GND 22 PERST# 23 PERn0 24 +3.3 V aux 25 PERp0 26 GND 27 GND 28 +1.5 V 29 GND 30 SMB_CLK 31 PETn0 32 SMB_DATA 33 PETp0 34 GND 35 GND 36 USB_D. 37 GND (mSATA) GND 38 USB_D+ 39 +3.3 V aux (mSATA) 3.3 V 40 GND 41 +3.3 V aux (mSATA) 3.3 V 42 LED_WWAN# 43 Reserved (mSATA indicator) 44 LED_WLAN# 45 Reserved (mSATA) Vendor 46 LED_WPAN# 47 Reserved (mSATA) Vendor 48 +1.5 V 49 Reserved (mSATA) DA/DSS 50 GND 51 Reserved (mSATA) Presence Detection 52 _3.3 V 2.2.2.2 Add-in Card Connectors The board has the following add-in card connectors: • Three PCI Express 3.0 x16 bus add-in card connectors from the processor . 1st PCI Express x16 slot is electrically x8 or x16 . 2nd PCI Express x16 slot...

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