EC2 Mac instances are powered by a combination of Mac mini computers—featuring Intel’s 8th generation 3.2 GHz (4.6 GHz turbo) Core i7 processors, 6 physical/12 logical cores, and 32 GiB of memory – and the AWS Nitro System, providing up to 10 Gbps of VPC network bandwidth and 8 Gbps of EBS storage bandwidth through high-speed Thunderbolt 3 connections.
https://aws.amazon.com/about-aws/whats-new/2020/11/announcing-amazon-ec2-mac-instances-for-macos/

