What is AWS C5n.18xlarge Instance?

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The C5n.18xlarge instance is one of the most powerful instances available on Amazon Web Services (AWS), and is designed for compute-intensive workloads such as high-performance computing, machine learning, and video encoding. In this article, we will explore the features and capabilities of the C5n.18xlarge instance, and how it can be used to power your most demanding workloads.

Key Features

The C5n.18xlarge instance is part of the C5 family of instances and is built on the Nitro system, a combination of dedicated hardware and lightweight hypervisor that enables high performance and low latency. It features 72 vCPUs, 144 GiB of memory, and up to 100 Gbps of network bandwidth. Additionally, it is powered by Intel Xeon Platinum 8259CL processors that are optimized for high performance and power efficiency.

One of the most notable features of the C5n.18xlarge instance is its ability to use enhanced networking (ENA) and SR-IOV. ENA is a technology that allows for higher levels of network performance by offloading certain networking functions to dedicated hardware. SR-IOV, on the other hand, allows for even lower latency and higher throughput by bypassing the virtualization layer for network traffic. Together, these technologies can provide extremely high levels of network performance for the C5n.18xlarge instance.

The C5n.18xlarge instance also comes with NVMe-based SSD storage, which allows for high-performance storage with low latency. This makes it ideal for applications that require high IOPS (input/output operations per second) and low latency, such as databases and data analytics workloads.

Use Cases

The C5n.18xlarge instance is well-suited for a wide range of compute-intensive workloads, including:

  • High-performance computing (HPC): The C5n.18xlarge instance can be used to power HPC workloads such as scientific simulations, data modeling, and analytics. Its high-performance processors and large amount of memory make it ideal for running complex and demanding workloads.
  • Machine learning: The C5n.18xlarge instance can be used to train and deploy machine learning models. Its high-performance processors and large amount of memory make it ideal for running large and complex models.
  • Video encoding: The C5n.18xlarge instance can be used to encode large video files in a shorter time, making it ideal for video production companies and media streaming platforms.
  • Genomic research: The C5n.18xlarge instance can be used to perform genomic research, such as DNA sequencing and genome assembly.
  • Genome Data Analysis: For large scale genome data analysis, C5n.18xlarge instances can be used for processing large data sets and running complex bioinformatics workloads.


The C5n.18xlarge instance on AWS is a powerful instance that is designed for compute-intensive workloads. Its high-performance processors, large amount of memory, and fast network bandwidth make it ideal for running demanding workloads. Its ability to use enhanced networking (ENA) and SR-IOV, as well as its NVMe-based SSD storage, makes it one of the most powerful instances available on the market. The C5n.18xlarge instance is well-suited for a wide range of use cases such as High-performance computing, Machine Learning, Video encoding, and Genomic research, and Data Analysis.

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