Benchmarking Amazon EC2's New C6a Instances Powered By 3rd Gen EPYC

The HCPG benchmark saw a 12% boost in performance generationally from the compute-optimized 2nd Gen EPYC to 3rd Gen EPYC instance.

In the Oregon region used for testing, the C6a instance is slightly cheaper than C5a at $1.224 USD per hour for the new EPYC 7R13-based instance compared to $1.232 with the prior-generation instance.

NAMD also enjoyed significant generational improvements with C6a and providing even better value over C5a.

OpenFOAM as another popular HPC workload for stressing these compute-optimized instances also enjoyed great uplift from C5a to C6a as measured on the 8xlarge size.

Intel's OSPray ray-tracing engine also enjoyed significant uplift on C6a compared to the prior generation instance.