Manual
Page 7
...is optional due to a hardware limitation, the PCIEX1_1 slot can only accommodate a shorter PCI Express x1 expansion card. GA-P55-UD6 Motherboard Layout KB_USB R_SPDIF SYS_FAN3 ATX_12V_2X USB_1394_ESATA_2 LGA1156 CPU_FAN PW_SW USB_1394_ESATA_1 USB_LAN2 USB_LAN1 JMB362 F_AUDIO AUDIO PCIEX1_1 (Note 1) RTL8111D PCH_FAN...Intel® P55 PCIEX16_1 CODEC CD_IN SPDIF_I PCI1 PCIEX8_1 GA-P55-UD6 BATTERY TPM IC (Note 3) B_BIOS M_BIOS SPDIF_O PCI2 ACPI LED TSB43AB23 DDR3_3 DDR3_2 DDR3_1 DDR3_6 DDR3_5 DDR3_4 MD1 MD2 ATX GD1 GD2 PWR_FAN PHASE LED SYS_FAN1 JMB362 GIGABYTE SATA2 RST_SW ...
...is optional due to a hardware limitation, the PCIEX1_1 slot can only accommodate a shorter PCI Express x1 expansion card. GA-P55-UD6 Motherboard Layout KB_USB R_SPDIF SYS_FAN3 ATX_12V_2X USB_1394_ESATA_2 LGA1156 CPU_FAN PW_SW USB_1394_ESATA_1 USB_LAN2 USB_LAN1 JMB362 F_AUDIO AUDIO PCIEX1_1 (Note 1) RTL8111D PCH_FAN...Intel® P55 PCIEX16_1 CODEC CD_IN SPDIF_I PCI1 PCIEX8_1 GA-P55-UD6 BATTERY TPM IC (Note 3) B_BIOS M_BIOS SPDIF_O PCI2 ACPI LED TSB43AB23 DDR3_3 DDR3_2 DDR3_1 DDR3_6 DDR3_5 DDR3_4 MD1 MD2 ATX GD1 GD2 PWR_FAN PHASE LED SYS_FAN1 JMB362 GIGABYTE SATA2 RST_SW ...