RFQ
01Part-number led inquiry path
MCX555A-ECAT can be used as the direct starting point for quotation, BOM sharing and availability discussion.
Network adapters & DPUs• MCX555A-ECAT
NVIDIA MCX555A-ECAT 100Gb/s Single-Port QSFP28 InfiniBand Adapter PCIe 3.0 x16 ConnectX-5 Network Card
High-performance 100Gb/s InfiniBand adapter with PCIe 3.0 x16, QSFP28 port, RDMA, and NVMe-oF offloads for HPC and AI workloads.
RFQ
Inquiry ready
Clear path for part number, quantity and BOM-led contact.
EN / AR
Bilingual buyer flow
Useful for procurement teams coordinating technical review across regions.
Datasheet available
The product datasheet can be downloaded directly from this page.
Fast technical snapshotDatasheet available
MCX555A-ECAT
Product photoCMS image ready
Selected specs
1x QSFP28, up to 100Gb/s InfiniBand (EDR) and 100GbE
PCI Express 3.0 x16 (compatible with x8, x4, x2, x1)
100GbE, 50GbE, 40GbE, 25GbE, 10GbE, 1GbE; IEEE 802.3cd, 802.3bj, 802.3by, 802.3ba, 802.3ae
RDMA over Converged Ethernet (RoCE), hardware reliable transport, out-of-order RDMA, atomic operations
Hardware offload for VXLAN, NVGRE, GENEVE encapsulation/decapsulation
NC-SI over MCTP, PLDM for monitor/control and firmware update, I2C, SPI, JTAG
Remote boot over InfiniBand, Ethernet, iSCSI; UEFI, PXE support
Not publicly specified; typical sub-20W range – please confirm for your system
Deployment fit
High-Performance Computing (HPC): Ideal for supercomputing clusters, MPI-based simulations, and scientific research workloads requiring low latency and high message rates.
Follow-up path
Quote / Compatibility / Availability
Prepared for part-number led and BOM-led requests
MCX555A-ECAT
Product photoCMS image ready
Product media
From product visual to RFQ context
When product photography is available it appears here for faster review, and a clean technical outline remains useful for early evaluation when imagery is limited.
01Product imagery when available
02Clear technical outline for fast review
03Built for specification review before inquiry
Overview
Product overview
The NVIDIA ConnectX-5 MCX555A-ECAT is a single-port 100Gb/s InfiniBand adapter card in a low-profile PCIe form factor. Leveraging the proven ConnectX-5 architecture, it delivers up to 100Gb/s throughput with sub-microsecond latency and a high message rate. The card supports both InfiniBand (up to EDR) and 100GbE, providing versatile connectivity for high-performance computing, storage, and virtualized environments. Built with an embedded PCIe switch and advanced RDMA capabilities, the MCX555A-ECAT offloads critical communication tasks from the CPU — enabling higher application performance, lower power consumption, and reduced total cost of ownership. It is fully compatible with PCIe 3.0 x16 slots and supports a wide range of operating systems and acceleration frameworks.
Key features
- Up to 100Gb/s connectivity per port (InfiniBand EDR / 100GbE): Single QSFP28 connector for optical or copper cables
- PCIe 3.0 x16 host interface (auto-negotiates to x8, x4, x2, x1): RDMA, send/receive semantics with hardware-based reliable transport
- Tag matching and rendezvous offloads for MPI and SHMEM: NVMe over Fabrics (NVMe-oF) target offloads for efficient storage
- GPUDirect RDMA (PeerDirect) acceleration for GPU communication: Hardware-based congestion control & adaptive routing support
- SR-IOV virtualization: up to 512 virtual functions: RoHS compliant, low-profile form factor (tall bracket included)
- The ConnectX-5 architecture integrates a range of hardware acceleration engines that reduce CPU intervention and improve application scalability:
- MPI Tag Matching & Rendezvous Offload: Offloads message matching and rendezvous protocol processing, dramatically improving MPI performance for HPC clusters.
- Out-of-Order RDMA with Adaptive Routing: Enables efficient use of multiple network paths while maintaining ordered completion semantics, maximizing fabric utilization.
Typical applications
- High-Performance Computing (HPC): Ideal for supercomputing clusters, MPI-based simulations, and scientific research workloads requiring low latency and high message rates.
- AI & Deep Learning Training: Combined with GPUDirect RDMA, enables fast GPU-to-GPU communication across nodes, accelerating training times.
- NVMe-oF Storage Systems: Deploy as storage targets or initiators in NVMe over Fabrics environments for high-throughput, low-latency block storage access.
- Cloud & Virtualized Data Centers: SR-IOV and virtualization offloads support multi-tenant environments with guaranteed QoS and secure isolation.
- High-Frequency Trading (HFT): Ultra-low latency and hardware timestamping (IEEE 1588v2) meet the demands of financial services applications.
Buying flow
How this product review turns into a real inquiry
This section gives buyers a practical handoff from technical review into quotation or compatibility follow-up.
01
Identify the exact target model
Start from MCX555A-ECAT or the product name to reduce ambiguity before quotation starts.
02
Add quantity or deployment context
Share quantity, destination or BOM context so the commercial follow-up is aligned with the project scope.
03
Move into availability and fit review
Use the page as the handoff point for stock discussion, compatibility checks and delivery planning.
Technical snapshot
- 1x QSFP28, up to 100Gb/s InfiniBand (EDR) and 100GbE
- PCI Express 3.0 x16 (compatible with x8, x4, x2, x1)
- 100GbE, 50GbE, 40GbE, 25GbE, 10GbE, 1GbE; IEEE 802.3cd, 802.3bj, 802.3by, 802.3ba, 802.3ae
- RDMA over Converged Ethernet (RoCE), hardware reliable transport, out-of-order RDMA, atomic operations
- Hardware offload for VXLAN, NVGRE, GENEVE encapsulation/decapsulation
- NC-SI over MCTP, PLDM for monitor/control and firmware update, I2C, SPI, JTAG
- Remote boot over InfiniBand, Ethernet, iSCSI; UEFI, PXE support
- Not publicly specified; typical sub-20W range – please confirm for your system
- RoHS, REACH, FCC, CE, VCCI, ICES, RCM
- Note: Specifications derived from NVIDIA ConnectX-5 product documentation. For the latest details and firmware support, refer to official NVIDIA release notes.
Trust signals
Why buyers use this page to review MCX555A-ECAT
The page is designed to reduce the distance between specification review and a real commercial inquiry.
Review
02Compatibility review before follow-up
The NVIDIA MCX555A-ECAT 100Gb/s Single-Port QSFP28 InfiniBand Adapter PCIe 3.0 x16 ConnectX-5 Network Card page is positioned to support compatibility questions and project-fit review before commercial action is finalized.
Project
03Project and quantity alignment
This model can be framed against use cases such as High-Performance Computing (HPC): Ideal for supercomputing clusters, MPI-based simulations, and scientific research workloads requiring low latency and high message rates. together with quantity and rollout timing.
Language
04English and Arabic follow-up
The bilingual route supports regional buying teams that need technical review and RFQ handling in two languages.
FAQ
Frequently asked questions about MCX555A-ECAT
Short answers that give buyers clearer expectations before they move into the quote form.
Can I request a quote for MCX555A-ECAT directly from this page?01
Yes. This page is designed to move MCX555A-ECAT review directly into quotation, availability or BOM discussion.
Does MCX555A-ECAT support compatibility discussion before purchase?02
Yes. The page can be used to frame compatibility questions around High-Performance Computing (HPC): Ideal for supercomputing clusters, MPI-based simulations, and scientific research workloads requiring low latency and high message rates. before commercial follow-up.
Can MCX555A-ECAT be compared with nearby models in the same family?03
Yes. Related products within the same category give buyers an internal comparison path before they submit an inquiry.
Can I send quantity or a BOM list with the inquiry?04
Yes. The inquiry path is designed to accept part numbers, quantity, BOM context and availability requirements in one submission.
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Related products in the same family
Internal links that support model comparison and adjacent product discovery.
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MCX555A-ECAT
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