
About This Manual
This User Manual describes NVIDIA® Mellanox® ConnectX®-5 and ConnectX®-5 Ex Ethernet adapter
cards for Open Compute Project (OCP), Spec 2.0. It provides details as to the interfaces of the board,
specifications, required software and firmware for operating the board, and relevant documentation.
Ordering Part Numbers
The table below provides the ordering part numbers (OPN) for the available ConnectX-5 Ex and
ConnectX-5 Ethernet adapter cards for OCP Spec 2.0.
IC in Use OPN Marketing Description
ConnectX®-5
MCX542A-ACAN ConnectX®-5 EN network interface card for
OCP2.0, Type 1, with host management,
25GbE dual-port SFP28, PCIe3.0 x16,
Halogen-free, no bracket
MCX542B-ACAN ConnectX®-5 EN network interface card for
OCP2.0,Type 1, with host management,
25GbE dual-port SFP28, PCIe3.0 x8, Halogen-
free, no bracket
MCX542B-ACUN ConnectX®-5 EN network interface card for
OCP2.0, Type 1, with host management,
25GbE dual-port SFP28, PCIe3.0 x8, UEFI
Enabled (x86/ARM), Halogen free, no bracket
MCX545B-GCUN ConnectX®-5 EN network interface card for
OCP2.0, Type 1, with hostmanagement,
50GbE,single-port QSFP28,PCIe3.0x16,UEFI
Enabled, no bracket
MCX545B-CCUN ConnectX®-5 EN network interface card for
OCP2.0, Type 1, with host management,
100GbE, single-port QSFP28, PCIe3.0 x16,
UEFI Enabled, no bracket
MCX545A-CCAN ConnectX®-5 EN network interface card for
OCP2.0, Type 2, with host management,
100GbE, single-port QSFP28, PCIe3.0 x16, no
bracket
MCX545A-CCUN ConnectX®-5 EN network interface card for
OCP2.0, Type 2, with host management,
100GbE, single-port QSFP28, PCIe3.0 x16,
UEFI Enabled, no bracket
ConnectX®-5 Ex
MCX546A-BCAN ConnectX®-5 Ex EN network interface card
for OCP2.0, Type 2, 40GbE dual-port QSFP28,
PCIe3.0 x16, no bracket
MCX546A-CDAN ConnectX®-5 Ex network interface card for
OCP2.0, Type 2, with host management,
100GbE dual-port QSFP28, PCIe4.0 x16, no
bracket
Intended Audience
This manual is intended for the installer and user of these cards.The manual assumes basic familiarity
with Ethernet network and architecture specifications.
Technical Support