The Mellanox MCX4111A ACUT is a high performance network adapter, which is part of the Mellanox ConnectX 4 series. Here's an overview of its key features:

1. Introduction:

The Mellanox MCX4111A ACUT is designed for high speed data transmission and is commonly used in data centers, high performance computing (HPC), and enterprise environments. It is known for its low latency and high throughput, making it suitable for applications that require fast and reliable network connectivity.

2. Speed:

The MCX4111A ACUT supports 100Gb/s (100 Gigabit per second) Ethernet speeds, which is achieved through the use of 25Gb/s lanes in a 4x configuration. This allows for high data transfer rates and is particularly beneficial for applications that require large amounts of data to be moved quickly.

3. Interface Type:

The adapter uses QSFP28 (Quad Small Form factor Pluggable) transceivers, which are compact and support multiple high speed data channels. The QSFP28 interface is designed to fit into high density systems and is commonly used in modern data center infrastructure.

4. Hardware Interface:

The hardware interface of the MCX4111A ACUT is PCI Express (PCIe) 3.0, which is a high speed serial computer expansion bus standard. This interface allows the adapter to connect directly to the motherboard of a server or workstation, providing a direct path for data transfer.

5. Chip Type System:

The MCX4111A ACUT is based on Mellanox's ConnectX 4 EN network adapter technology, which includes a programmable hardware engine that can offload various network functions from the host CPU. This results in lower latency and higher performance for network intensive applications.

6. Additional Features:

  RoCE (RDMA over Converged Ethernet): Supports RDMA, which allows for direct memory access from one computer to another without involving the operating system, reducing latency and improving performance.

  VPI (Virtual Protocol Interconnect): Enables virtualization of the network interface, allowing multiple virtual machines to share a single physical adapter.

  Energy Efficient: Designed with power saving features to reduce energy consumption in data centers.

  Reliability: Incorporates advanced error detection and correction mechanisms to ensure data integrity over long distances.

The Mellanox MCX4111A ACUT is a sophisticated piece of hardware that offers significant advantages in terms of speed, efficiency, and reliability for demanding network applications.

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