Amazon Redshift Brings Faster, Cheaper RG Instances to GovCloud
Amazon Redshift now offers rg.large and rg.12xlarge instance sizes in AWS GovCloud (US-West) and AWS GovCloud (US-East), letting you run data warehouse and data lake workloads 2.4x faster than RA3 instances at 30% lower cost per vCPU. You can resize existing clusters or upgrade from RA3 using Elastic Resize, Classic Resize, or Snapshot & Restore.
source: [aws/whats-new]