Manual
Page 7
...optional due to a hardware limitation, the PCIEX1_1 slot can only accommodate a shorter PCI Express x1 expansion card. GA-P55A-UD5 Motherboard Layout KB_USB SYS_FAN3 R_SPDIF ATX_12V_2X USB_1394_ESATA_2 USB_1394_ESATA_1 CPU_LED LGA1156 CPU_FAN Phase LED PWR_FAN DIMM_LED IDE_LED USB_LAN MD1 GD1 MD2 GD2 ... IDE JMicron JMB362 NEC AUDIO F_AUDIO PCIEX1_1 (Note 1) PE1_LED RTL8111D PCH_FAN RTL8111D PCIEX1_2 Intel® P55 PCIEX16_1 CODEC PCI1 GA-P55A-UD5 SPDIF_I CD_IN PCIEX8_1 SPDIF_O PCI2 TPM_IC(Note 2) PCI_LED DDR3_2 DDR3_1 DDR3_4 DDR3_3 PE_LED SA_LED B_BIOS IT8213 ...
...optional due to a hardware limitation, the PCIEX1_1 slot can only accommodate a shorter PCI Express x1 expansion card. GA-P55A-UD5 Motherboard Layout KB_USB SYS_FAN3 R_SPDIF ATX_12V_2X USB_1394_ESATA_2 USB_1394_ESATA_1 CPU_LED LGA1156 CPU_FAN Phase LED PWR_FAN DIMM_LED IDE_LED USB_LAN MD1 GD1 MD2 GD2 ... IDE JMicron JMB362 NEC AUDIO F_AUDIO PCIEX1_1 (Note 1) PE1_LED RTL8111D PCH_FAN RTL8111D PCIEX1_2 Intel® P55 PCIEX16_1 CODEC PCI1 GA-P55A-UD5 SPDIF_I CD_IN PCIEX8_1 SPDIF_O PCI2 TPM_IC(Note 2) PCI_LED DDR3_2 DDR3_1 DDR3_4 DDR3_3 PE_LED SA_LED B_BIOS IT8213 ...