Amazon EC2 instances with AMD 1st gen EPYC Processors

As per Amazon Website M5a, T3a, R5a family instances have got  AMD 1st gen EPYC Processors

can help optimize both cost and performance, and are an ideal fit for many workloads that do not fully utilize the compute resources such as small/medium size databases.

2nd gen EPYC s are more advanced, you can look for them here.

https://softwaredatarack.blogspot.com/2021/11/amazon-aws-ec2-instances-with-amd-2nd.html