Nvidia Mellanox ConnectX-6 MCX654106A-ECAT User Manual page 13

ConnectX-6 Single-slot Socket Direct Cards (2x PCIe x8 in a
row)
The PCIe x16 interface comprises two PCIe x8 in a row, such that each of the PCIe x8 lanes can be
connected to a dedicated CPU in a dual-socket server. In such a configuration, Socket Direct brings
lower latency and lower CPU utilization as the direct connection from each CPU to the network means
the interconnect can bypass a QPI (UPI) and the other CPU, optimizing performance and improving
latency. CPU utilization is improved as each CPU handles only its own traffic and not traffic from the
other CPU.
A system with a custom PCI Express x16 slot that includes special signals is required for installing the
card. Please refer to PCIe Express Pinouts Description for Single-Slot Socket Direct Card
definitions.
Part Number
Form Factor/Dimensions
Data Transmission Rate
Network Connector Type
PCIe x16 through Edge Connector PCIe Gen 3.0 / 4.0 SERDES @ 8.0GT/s / 16.0GT/s Socket Direct 2x8 in a row
RoHS
Adapter IC Part Number
MCX653105A-EFAT
PCIe Half Height, Half Length / 167.65mm x 68.90mm
Ethernet: 10/25/40/50/100 Gb/s
InfiniBand: SDR, DDR, QDR, FDR, EDR, HDR100
Single-port QSFP56
RoHS Compliant
MT28908A0-XCCF-HVM
MCX653106A-EFAT
Dual-port QSFP56
for pinout
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