Express-BASE7 R3.1 Carrier Board Reference Carrier for COM Express Type 7 Module This page aims to highlight the capabilities of the Express-BASE7 R3.1 Carrier Board. Features PCIe Gen4, 10G Ethernet, Remote management BMC, and other interfaces summarized in the table below are their maximum feature sets. Interfaces available are also subjected to the module’s offering. Please check the bottom of this page for details Feature Support Matrix Function Maximum Feature Note PCI Express 1x PCIe Gen4x16 slot2x PCIe Gen4x4 slot 1x PCIe Gen4x8 slot Ethernet 4x 10GbE 1x 2.5GbE at RJ-451x mgt. GbE at RJ-45 Note_1 Rear I/ORear I/O, Note_2 USB 4x USB3.x/2.0 at Type A2x USB3.x/2.0 at header1x USB3.x/2.0 at Type E Rear I/O Front Panel Front Panel SATA 2x SATA Display 1x VGA at DB9 Note_2 UART 2x UART at DB9 1x UART at DB9 1x UART at header Rear I/O Rear I/O, Note_2 Note_2 FAN 1x FAN for COM module 4x FAN Note_2 GPIO 8x GPIO SMB/I2C 1x SMB 1x I2C Misc. Button, LED, voltage etc… Front Panel Button Power BTN, Reset BTN LED S3, 5VSB, WDT, HDD, Power_ON Power Input 24 + 4 pin Note: Table above mainly focuses on the interfaces sourced from CPU (COM Express module). Get details from BMC Introduction about the interfaces offered by the BMC. Note_1 : Insert additional 10G Ethernet adapter card into PCIe x16 slot (proprietary pinout). The slot marked as 10G-KR Note_2 : These function are enabled if the BMC module is inserted into dedicated DDR socket (proprietary pinout). The slot marked as RunBMC Component Location Download Component location datasheet: Click here Functional Diagram Connectors, Headers and Pinouts Carrier Board Signals - Type 7 New Features of COM Express R3.1 Type 7 add support for PCIe Gen4 add second PCIe Clock add IPMB interface for Platform Management update 10G Ethernet Interface to support CEI side-band signaling Connector Location and Pinout Compatibility Connector positions and pinouts comply with the pinout and signal descriptions within PICMG® COM.0 - COM Express Module Base specification, Revision 3.1. This document includes description of pinouts, signal descriptions and mechanical characteristics of the COM Express specification. The Express-BASE7 R3.1 is compatible with COM Express modules in Basic and Compact form factor, Type 7 pinout, COM.0 Rev. 3.1. Carrier Board Design Express-BASE7 R3.1 follows the PICMG COM Express Carrier Design Guide where possible, and its design and schematic have been fully verified. It is recommended to utilize them as references for your carrier board design. COM Express R3.1 Type 7 Board-to-board Connectors ROW_AB Pin Name Pin Name A1 GND (fixed) B1 GND (fixed) A2 GBE0_MDI3- B2 GBE0_ACT# A3 GBE0_MDI3+ B3 LPC_FRAME#/ESPI_CS0# A4 GBE0_LINK_MID# B4 LPC_AD0/ESPI_IO_0 A5 GBE0_LINK_MAX# B5 LPC_AD1/ESPI_IO_1 A6 GBE0_MDI2- B6 LPC_AD2/ESPI_IO_2 A7 GBE0_MDI2+ B7 LPC_AD3/ESPI_IO_3 A8 GBE0_LINK# B8 LPC_DRQ0#/ESPI_ALERT0# A9 GBE0_MDI1- B9 LPC_DRQ1#/ESPI_ALERT1# A10 GBE0_MDI1+ B10 LPC_CLK/ESPI_CK A11 GND (fixed) B11 GND (fixed) A12 GBE0_MDI0- B12 PWRBTN# A13 GBE0_MDI0+ B13 SMB_CK A14 GBE0_CTREF B14 SMB_DAT A15 SUS_S3# B15 SMB_ALERT# A16 SATA0_TX+ B16 SATA1_TX+ A17 SATA0_TX- B17 SATA1_TX- A18 SUS_S4# B18 SUS_STAT#/ESPI_RESET# A19 SATA0_RX+ B19 SATA1_RX+ A20 SATA0_RX- B20 SATA1_RX- A21 GND (fixed) B21 GND (fixed) A22 PCIE_TX15+ B22 PCIE_RX15+ A23 PCIE_TX15- B23 PCIE_RX15- A24 SUS_S5# B24 PWR_OK A25 PCIE_TX14+ B25 PCIE_RX14+ A26 PCIE_TX14- B26 PCIE_RX14- A27 BATLOW# B27 WDT A28 (S)ATA_ACT# B28 GND A29 RSVD B29 PCIE_CK_REF1+ A30 RSVD B30 PCIE_CK_REF1- A31 GND (fixed) B31 GND (fixed) A32 IPMB_CLK B32 SPKR A33 IPMB_DAT B33 I2C_CK A34 BIOS_DIS0#/ESPI_SAFS B34 I2C_DAT A35 THRMTRIP# B35 THRM# A36 PCIE_TX13+ B36 PCIE_RX13+ A37 PCIE_TX13- B37 PCIE_RX13- A38 GND B38 GND A39 PCIE_TX12+ B39 PCIE_RX12+ A40 PCIE_TX12- B40 PCIE_RX12- A41 GND (fixed) B41 GND (fixed) A42 USB2- B42 USB3- A43 USB2+ B43 USB3+ A44 USB_2_3_OC# B44 USB_0_1_OC# A45 USB0- B45 USB1- A46 USB0+ B46 USB1+ A47 VCC_RTC B47 ESPI_EN# A48 RSMRST_OUT# B48 USB0_HOST_PRSNT A49 GBE0_SDP B49 SYS_RESET# A50 LPC_SERIRQ/ESPI_CS1# B50 CB_RESET# A51 GND (fixed) B51 GND (fixed) A52 PCIE_TX5+ B52 PCIE_RX5+ A53 PCIE_TX5- B53 PCIE_RX5- A54 GPI0 B54 GPO1 A55 PCIE_TX4+ B55 PCIE_RX4+ A56 PCIE_TX4- B56 PCIE_RX4- A57 GND B57 GPO2 A58 PCIE_TX3+ B58 PCIE_RX3+ A59 PCIE_TX3- B59 PCIE_RX3- A60 GND (fixed) B60 GND (fixed) A61 PCIE_TX2+ B61 PCIE_RX2+ A62 PCIE_TX2- B62 PCIE_RX2- A63 GPI1 B63 GPO3 A64 PCIE_TX1+ B64 PCIE_RX1+ A65 PCIE_TX1- B65 PCIE_RX1- A66 GND B66 WAKE0# A67 GPI2 B67 WAKE1# A68 PCIE_TX0+ B68 PCIE_RX0+ A69 PCIE_TX0- B69 PCIE_RX0- A70 GND (fixed) B70 GND (fixed) A71 PCIE_TX8+ B71 PCIE_RX8+ A72 PCIE_TX8- B72 PCIE_RX8- A73 GND B73 GND A74 PCIE_TX9+ B74 PCIE_RX9+ A75 PCIE_TX9- B75 PCIE_RX9- A76 GND B76 GND A77 PCIE_TX10+ B77 PCIE_RX10+ A78 PCIE_TX10- B78 PCIE_RX10- A79 GND B79 GND A80 GND (fixed) B80 GND (fixed) A81 PCIE_TX11+ B81 PCIE_RX11+ A82 PCIE_TX11- B82 PCIE_RX11- A83 GND B83 GND A84 NCSI_TX_EN B84 VCC_5V_SBY A85 GPI3 B85 VCC_5V_SBY A86 RSVD B86 VCC_5V_SBY A87 GND B87 VCC_5V_SBY A88 PCIE0_CK_REF+ B88 BIOS_DIS1# A89 PCIE0_CK_REF- B89 NSCI_RX_ER A90 GND (fixed) B90 GND (fixed) A91 SPI_POWER B91 NCSI_CLK_IN A92 SPI_MISO B92 NCSI_RXD1 A93 GPO0 B93 NCSI_RXD0 A94 SPI_CLK B94 NCSI_CRS_DV A95 SPI_MOSI B95 NCSI_TXD1 A96 TPM_PP B96 NCSI_TXD0 A97 TYPE10# B97 SPI_CS# A98 SER0_TX B98 NCSI_ARB_IN A99 SER0_RX B99 NCSI_ARB_OUT A100 GND (fixed) B100 GND (fixed) A101 SER1_TX B101 FAN_PWMOUT A102 SER1_RX B102 FAN_TACHIN A103 LID# B103 SLEEP# A104 VCC_12V B104 VCC_12V A105 VCC_12V B105 VCC_12V A106 VCC_12V B106 VCC_12V A107 VCC_12V B107 VCC_12V A108 VCC_12V B108 VCC_12V A109 VCC_12V B109 VCC_12V A110 GND (fixed) B110 GND (FIXED) ROW_CD Pin Name Pin Name C1 GND (fixed) D1 GND (fixed) C2 GND D2 GND C3 USB_SSRX0- D3 USB_SSTX0- C4 USB_SSRX0+ D4 USB_SSTX0+ C5 GND D5 GND C6 USB_SSRX1- D6 USB_SSTX1- C7 USB_SSRX1+ D7 USB_SSTX1+ C8 GND D8 GND C9 USB_SSRX2- D9 USB_SSTX2- C10 USB_SSRX2+ D10 USB_SSTX2+ C11 GND (fixed) D11 GND (fixed) C12 USB_SSRX3- D12 USB_SSTX3- C13 USB_SSRX3+ D13 USB_SSTX3+ C14 GND D14 GND C15 RSVD10G D15 RSVD10G C16 RSVD10G D16 RSVD10G C17 10G_SDP2 D17 10G_SDP3 C18 GND D18 GND C19 PCIE_RX6+ D19 PCIE_TX6+ C20 PCIE_RX6- D20 PCIE_TX6- C21 GND (fixed) D21 GND (fixed) C22 PCIE_RX7+ D22 PCIE_TX7+ C23 PCIE_RX7- D23 PCIE_TX7- C24 RSVD10G D24 RSVD10G C25 GND D25 GND C26 10G_KR_RX3+ D26 10G_KR_TX3+ C27 10G_KR_RX3- D27 10G_KR_TX3- C28 GND D28 GND C29 10G_KR_RX2+ D29 10G_KR_TX2+ C30 10G_KR_RX2- D30 10G_KR_TX2- C31 GND (fixed) D31 GND (fixed) C32 RSVD10G D32 RSVD10G/GP_SPI_CLK* C33 RSVD10G D33 RSVD10G/GP_SPI_MOSI* C34 RSVD10G D34 RSVD10G/GP_SPI_MISO* C35 CEI_RST# D35 CEI_PRSNT# C36 RSVD10G D36 RSVD/GP_SPI_CS#* C37 RSVD10G D37 RSVD C38 RSVD10G D38 RSVD10G C39 CEI_SDA D39 CEI_SCL C40 10G_SDP0 D40 10G_SDP1 C41 GND (fixed) D41 GND (fixed) C42 10G_KR_RX1+ D42 10G_KR_TX1+ C43 10G_KR_RX1- D43 10G_KR_TX1- C44 GND D44 GND C45 RSVD10G/10G_PHY_MDC_SCL1* D45 RSVD10G/10G_PHY_MDIO_SDA1* C46 CEI_MDC D46 CEI_MDIO C47 CEI_INT# D47 ETH_PHY_INT# C48 GND D48 GND C49 10G_KR_RX0+ D49 10G_KR_TX0+ C50 10G_KR_RX0- D50 10G_KR_TX0- C51 GND (fixed) D51 GND (fixed) C52 PCIE_RX16+ D52 PCIE_TX16+ C53 PCIE_RX16- D53 PCIE_TX16- C54 TYPE0# D54 GND C55 PCIE_RX17+ D55 PCIE_TX17+ C56 PCIE_RX17- D56 PCIE_TX17- C57 TYPE1# D57 TYPE2# C58 PCIE_RX18+ D58 PCIE_TX18+ C59 PCIE_RX18- D59 PCIE_TX18- C60 GND (fixed) D60 GND (fixed) C61 PCIE_RX19+ D61 PCIE_TX19+ C62 PCIE_RX19- D62 PCIE_TX19- C63 GND D63 GND C64 GND D64 GND C65 PCIE_RX20+ D65 PCIE_TX20+ C66 PCIE_RX20- D66 PCIE_TX20- C67 RAPID_SHUTDOWN D67 GND C68 PCIE_RX21+ D68 PCIE_TX21+ C69 PCIE_RX21- D69 PCIE_TX21- C70 GND (fixed) D70 GND (fixed) C71 PCIE_RX22+ D71 PCIE_TX22+ C72 PCIE_RX22- D72 PCIE_TX22- C73 GND D73 GND C74 PCIE_RX23+ D74 PCIE_TX23+ C75 PCIE_RX23- D75 PCIE_TX23- C76 GND D76 GND C77 GND D77 GND C78 PCIE_RX24+ D78 PCIE_TX24+ C79 PCIE_RX24- D79 PCIE_TX24- C80 GND (fixed) D80 GND (fixed) C81 PCIE_RX25+ D81 PCIE_TX25 C82 PCIE_RX25- D82 PCIE_TX25- C83 GND D83 GND C84 GND D84 GND C85 PCIE_RX26+ D85 PCIE_TX26+ C86 PCIE_RX26- D86 PCIE_TX26- C87 GND D87 GND C88 PCIE_RX27+ D88 PCIE_TX27+ C89 PCIE_RX27- D89 PCIE_TX27- C90 GND (fixed) D90 GND (fixed) C91 PCIE_RX28+ D91 PCIE_TX28+ C92 PCIE_RX28- D92 PCIE_TX28- C93 GND D93 GND C94 PCIE_RX29+ D94 PCIE_TX29+ C95 PCIE_RX29- D95 PCIE_TX29- C96 GND D96 GND C97 GND D97 GND C98 PCIE_RX30+ D98 PCIE_TX30+ C99 PCIE_RX30- D99 PCIE_TX30- C100 GND (fixed) D100 GND (fixed) C101 PCIE_RX31+ D101 PCIE_TX31+ C102 PCIE_RX31- D102 PCIE_TX31- C103 GND D103 GND C104 VCC_12V D104 VCC_12V C105 VCC_12V D105 VCC_12V C106 VCC_12V D106 VCC_12V C107 VCC_12V D107 VCC_12V C108 VCC_12V D108 VCC_12V C109 VCC_12V D109 VCC_12V C110 GND (FIXED) D110 GND (FIXED) Note : GP_SPI (D32, D33, D34, D36 pin), 10G_PHY_MDIO/MDC (C45, D45 pin) are for testing purpose, not for user usage. PCIe (PCI Express) Slots One PCIex16, two PCIex4 and one PCIex8 PCIe 16-31: x16, up to Gen4, support up to 2-slot width devices PCIe 0-3: x4, up to Gen4 PCIe 4-7: x4, up to Gen3 PCIe 8-15: x8, up to Gen3 JP5 (PCIE MUX): a jumper for PCIe 4-7 slot setting Jumper Status 1-2 PCIE CONN 2-3 Run BMC (Default, route PCIe 4 lane to BMC module) 10G Ethernet Up to 4x 10G, dependent on the 10G Ethernet adapter card and COM Express module’s offering. Get details about the 10G Ethernet card concept in 10G Ethernet Card Introduction 10G-KR: up to 4x 10G-KR lanes and its side-band signals. Convert these signals to 10G-SPF+ or 10GBASE-T via different kinds of dedicated 10G Ethernet adapter card if needed. 2.5G Ethernet & mgt. Ethernet LAN: RJ-45 connector at Rear I/O, up to 2.5GbE speed mgt.LAN: RJ-45 connector at Rear I/O, up to GbE speed, dedicated for remote management usage and sourced from BMC module USB Connectors & Headers USB0,1: 2x USB 3.x/2.0 at Type A connector at Rear I/O USB2,3: 2x USB 3.x/2.0 at Type A connector at Rear I/O FP_TYPE_E: 1x USB 3.x/2.0 at Type E connector, vertical direction for Front Panel FP_2xUSB: 2x USB 3.x/2.0 at 19-pin header, 2.54 mm pitch for Front Panel FP_TYPE_E Pin Signal Pin Signal 1 + 5V 11 + 5V 2 USB_SSTX1P 12 USB_SSTX2P 3 USB_SSTX1N 13 USB_SSTX2N 4 GND 14 GND 5 USB_SSRX1P 15 USB_SSRX2P 6 USB_SSRX1N 16 USB_SSRX2N 7 + 5V 17 GND 8 HUB_P1_CC1 18 USBN 9 NC 19 USBP 10 NC 20 HUB_P1_CC2 FP_2xUSB Pin Signal Pin Signal 1 NC 2 USB2P 3 USB1P 4 USB2N 5 USB1N 6 GND 7 GND 8 USB_SSTX2P 9 USB_SSTX1P 10 USB_SSTX2N 11 USB_SSTX1N 12 GND 13 GND 14 USB_SSRX2P 15 USB_SSRX1P 16 USB_SSRX2N 17 USB_SSRX1N 18 + 5V 19 + 5V JP14 (USB MUX): a jumper for KVM selection. USB from COM Express module connects to the BMC module as KVM usage or connects to Type A connector as normal usage. Jumper Status 1-2 Run BMC (Default) 2-3 USB CONN SATA Connectors SATA0: up to 6Gb/s SATA1: up to 6Gb/s VGA Connector VGA_UAR1: VGA output at DB9 connector, source from BMC module. default support It works if the BMC module is inserted with pin 2-3 shorted on JP5 COM Port Connectors & Headers VGA_UART1: 1x UART at DB9 at Rear I/O, support RS232/422 via JP10/11. Source from the BMC module Pin Signal Pin Signal 1 GND 2 DTR 3 TXD 4 RXD 5 DCD 6 RI# 7 CTS 8 RTS 9 DSR Note: an adapter will be required for UART1 port COM0_COM1: 2x UART at DB9 at Rear I/O. Source from the COM Express module Pin Signal Pin Signal 1 NC 2 SER0_RX 3 SER0_TX 4 NC 5 GND 6 NC 7 NC 8 NC 9 NC Pin Signal Pin Signal 1 NC 2 SER1_RX 3 SER1_TX 4 NC 5 GND 6 NC 7 NC 8 NC 9 NC UART2: 1x UART at 10-pin header, 2.54 mm pitch. Source from the BMC module Pin Signal Pin Signal 1 NC 2 NC 3 SER2_RX 4 SER2_RTS 5 SER2_TX 6 SER2_CTS 7 NC 8 NC 9 GND 10 NC JP10/11 (RS232/RS422 selection): jumpers for RS232/RS422 settings for UART1 JP10 JP11 Status 1-2 2-3 RS-232 1-2 1-2 RS-422 JP12/13 (UART SOL selection): jumpers for SOL setting JP12 JP13 Status 1-2 1-2 SOL (Default) 2-3 2-3 UART to connector or header FAN Connectors 1x Fan connector for the COM Express module, 4x Fan connectors for system level usage FAN_COMe: 4-pin connector, supporting 12V fan power, managed by the COM Express module FAN0-3: 4-pin connector, supporting 12V fan power, managed by the BMC module. PWM default setting is 100% Pin Signal 1 GND 2 FAN Power 12V 3 FAN Speed Sense 4 FAN Speed Control (PWM) RunBMC Socket RunBMC: a 260-pin DDR4 SODIMM socket that is used for inserting the BMC module. Get details in BMC Introduction IPMB Header IPMB: 1x IPMB bus at 4-pin header, 2.54 mm pitch. IPMB bus from BMC module and COM Express module (specific SKU) I2C & SMB Headers I2C: 1x I2C at 4-pin header, 2.54 mm pitch. Source from the COM Express module Pin Signal Pin Signal 1 + 3.3V 2 I2C_DAT 3 I2C_CLK 4 GND SMB: 1x SMB at 4-pin header, 2.54 mm pitch. source from COM Express module Pin Signal Pin Signal 1 + 3.3V 2 SMB_DAT 3 SMB_CLK 4 GND GPIO Header 8xGPIO: 8x GPIO at 8-pin header, 2.54 mm pitch. source from COM Express module Pin Signal Pin Signal 1 GPI0 2 GPO0 3 GPI1 4 GPO1 5 GIP2 6 GPO2 7 GIP3 8 GPO3 Carrier BIOS Socket A socket for SPI BOIS ROM. It will require special BIOS firmware and jumper setting, JP6/JP7 (not default offering) LPC/ESPI Debug Header LPC bus is default setting. supporting of ESPI bus will require JP8 setting and specific HW rework on carrier board. Pin Signal Pin Signal 1 LPC_CLK 2 GND 3 LPC_FRAME# 4 NC 5 LPC_RST# 6 + 5V 7 LPC_AD3 8 LPC_AD2 9 + 3.3VSB 10 LPC_AD1 11 LPC_AD0 12 GND 13 SMB_CK 14 SMB_DAT 15 + 1.8VSB * 16 NC 17 GND 18 LPC_SERIRQ 19 LPC_DRQ0 20 LPC_DRQ1 Pin.15 is for ESPI usage JP8 (LPC or ESPI switch) Jumper Status 1-2 LPC mode (Default) 2-3 eSPI mode (not offering) Front Panel Header F_PANEL Pin Signal Pin Signal 1 HDD_LED_P 2 PWR_LED_P (5V) 3 HDD_LED_N 4 PWR_LED_N 5 GND 6 PWR_BTN_P 7 RST_BTN_P 8 PWR_BTN_N 9 NC 10 NC 11 PWR_LED_P (5V) 12 + 5VSB 13 PWR_LED_N 14 GND 15 NC 16 NC 17 GND 18 NC 19 NC 20 NC RTC Battery RTC: a hold for placing RTC coin battery JP15 (Clear CMOS): to clear CMOS, shut down the power and short pin 2 and pin 3 (short VBAT to ground) Jumper Status 1-2 Normal (Default) 2-3 Clear CMOS Power Connectors & Power Jumpers ATX 24 and 4-pin connector offered, together with several jumpers for different power mode setting. the power mode setting also depends on COM Express module ATX_24: connect the ATX 24-pin (or 20-pin) connector to supply power to the Express-Base7 R3.1 carrier. ATX_4: connect the ATX 12V 4-pin connector to supply power to the COM Express module. JP1 (ATX/AT Mode): In AT mode, JP1 shorts PS_ON# to ground directly, forcing power on Jumper Status 1-2 ATX mode (Default) 2-3 AT mode JP2 (PWR_OK_Config): Connect the ATX 12V 4-pin connector to supply power to the COM Express module Jumper Status 1-2 Add 3.3V Pull-up with 10k to signal PWR_OK 3-4 Connect PWRGOOD of ATX power supply (Default) 5-6 Connect PWRGOOD of onboard DC-DC regulator JP3 (5VSB to Module Source): When an AT power supply is connected to the Express-BASE7 R3.1, JP3 can be used to provide 5VSB to the COM Express module from the carrier board. Jumper Status 1-2 5VSB from ATX power supply (Default) 2-3 5VSB produced on carrier from Vcc 3-4 No 5VSB to module JP4 (12V to Module in S3/S5 mode): JP1-2: no 12V to module in S3/S5 mode JP2-3: there’s always 12V input to the module regardless of the module state. Jumper Status 1-2 12V off in S3/S5 2-3 12V on in S3/S4 (Default) Power Strategy JP1 JP2 JP3 JP4 ATX PSU / ATX to COM Express module (Default) 1-2 3-4 1-2 2-3 ATX PSU / AT to COM Express module 2-3 3-4 3-4 2-3 AT PSU / ATX to COM Express module 1-2 1-2 2-3 1-2 AT PSU / AT to COM Express module 2-3 3-4 3-4 2-3 Note: All 12V power for the COM Express module is provided by the ATX 12V 4-pin connector. to avoid damage to the carrier board and installed components, be sure to connect the ATX power supply to proper connectors, see Power Connector Connection Buttons, LEDs and POST Buttons PWR_BTN, RST_BTN & SLP_BTN, LID_BTN (SLP_BTN, LID_BTN also depends on COM Express module) POST and Indicator LEDs An I2C based expander located on carrier board for POST display is added for debugging. The two 7-SEG LEDs show the actual POST data A row of mini-LEDs indicate the several power state LED Status S3 Indicates S3 status 5VSB ATX power attached on standby or active WDT+ Indicates watchdog activitywatchdog source from COM Express module HDD+ Indicates hard drive activity PWR_ON Indicates power on BMC_LED Indicates BMC module statusIt indicates the readiness of firmware initiation of the BMC chip (Always on means ready) Mechanical Dimensions will share later Power Connector Connection ATX Power Connectors The Express-Base7 R3.1 carrier board has one ATX 24-pin connector to supply power to the carrier board and one ATX 12V 4-pin connector to supply power to the COM Express module. The system will not power on unless an ATX 12V 4-pin connector is connected *Note: DO NOT plug the ATX 12V 4-pin connector into the ATX 24-pin power connector* If your power supply has a 24-pin ATX connector, then attach the connectors as illustrated below If your power supply has a 20-pin ATX connector, then attach the connectors as illustrated below Feature Support Matrix The supported interfaces also depend on COM Express module offering. Table below indicates the main support feature based on Express-VR7 (AMD Ryzen V3000 based COM Express Type 7 module) and Express-BASE7 R3.1 carrier board and RunBMC-AST2600 (BMC module) Function Maximum Feature Note PCI Express 1x PCIe Gen4x8 at slot 16-311x PCIe Gen4x4 at slot 0-31x PCIe Gen3x2 at slot 4-7 x8 only event at this x16 slot as KVM usage default Ethernet 2x 10GbE at slot 10G-KR1x 2.5GbE at RJ-451x mgt. GbE at RJ-45 10G Ethernet card required USB 4x USB3.x/2.0 at Type A2x USB3.x/2.0 at header1x USB3.x/2.0 at Type E USB_2 as KVM usage default SATA 2x SATA Display 1x VGA at DB9 UART 2x UART at DB9 1x UART at DB9 1x UART at header SOL usage as default FAN 1x FAN for COM module 4x FAN PWM = 100% default