Amazon Redshift RA3.xlplus nodes are now available in the AWS GovCloud (US) Regions. Amazon Redshift RA3 instances with managed storage allow you to scale compute and storage independently for fast query performance and lower costs. RA3 is available in three different node types to allow you to balance price and performance depending upon your workload requirements. RA3.xlplus nodes offer one-third compute (4 vCPU) and memory (32 GiB) compared to RA3.4xlarge at one-third of the price. RA3 nodes are built on the AWS Nitro System and feature high bandwidth networking and large high-performance SSDs as local caches.
Source:: Amazon AWS