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Chapter 4: Motherboard Connections
NVMe SMBus Headers
NVMe SMBus (I
2
C) header (JNVI
2
C), used for PCIe SMBus clock and data connections,
provides hot-plug support via a dedicated SMBus interface. This feature is only available for
a Supermicro complete system with an SMCI-proprietary NVMe add-on card and a proper
cable installed. See the table below for pin definitions.
NVMe SMBus Header
Pin Definitions
Pin#
Definition
1
Data
2
Ground
3
Clock
4
VCCIO
PCIe 4.0 M.2 Slot
The X12DPi-N(T)6 motherboard has one PCIe 4.0 M.2 slot. M.2 allows for a variety of card
sizes, increased functionality, and spatial efficiency. The M.2 slot on the motherboard supports
PCIe 4.0 x4 M.2 NVMe SSDs in the 2280 and 22110 form factors.
SlimSAS NVMe Connectors
Two SlimSAS NVMe connectors provide four NVMe connections (P1_NVME0/1, P1_
NVME2/3). Use these NVMe connections to attach high-speed PCIe storage devices.
Note
: When installing an NVMe device on a motherboard, please be sure to connect the first
NVMe port (P1_NVME0/1) first for your system to work properly.
NCSI Connector
The NCSI header (JNSCI) is used to connect a Network Interface Card (NIC) to the
motherboard which will allow the onboard BMC (Baseboard Controller) to communicate with
a network.
I-SATA 3.0 and S-SATA 3.0 Ports
The X12DPi-N(T)6 has eight I-SATA 3.0 ports (I-SATA0-3, I-SATA4-7) and six S-SATA
(S-SATA0-3, S-SATA4, S-SATA5) on the motherboard. These SATA ports are supported by
the Intel PCH C621A chipset. S-SATA4/S-SATA5 can be used with Supermicro SuperDOMs
which are orange SATA DOM connectors with power pins built in, and do not require external
power cables. S-SATA4/S-SATA-5 ports are compatible with regular SATA HDDs or SATA
DOMs that need external power cables.
