C5 instances are available in 6 sizes and introduce a new larger size, c5.18xlarge, which provides 72 vCPUs and 144 GiB of memory that will allow customers to effectively consolidate workloads. Next generation Elastic Network Adapter (ENA) and NVM Express (NVMe) technology provide C5 instances with high throughput, low latency interfaces for networking and Amazon Elastic Block Storage (Amazon EBS). C5 instances offer up to 25 Gbps of network bandwidth and up to 9 Gbps of Amazon EBS bandwidth. C5 instances also feature significantly higher networking and Amazon EBS performance on smaller instance sizes. They provide support for the new Intel Advanced Vector Extensions 512 (AVX-512) instruction set, offering up to 2x the FLOPS per core per cycle compared to the previous generation C4 instances. For a list of supported AMIs, visit the EC2 FAQ page.

