R6i

Amazon Elastic Compute Cloud (Amazon EC2) R6i instances, powered by 3rd Generation Intel Xeon Scalable processors, deliver up to 15% better price performance compared to R5 instances. R6i instances feature an 8:1 ratio of memory to vCPU, similar to R5 instances, and support up to 128 vCPUs per instance, which is 33% more than R5 instances

r6i.4xlarge

r5

Amazon EC2 Instance types, computed optimized, memory optimized, high memory, AMI, Burstable, CPU credits, on-demand, spot, Karpenter, t2, t3, t4g, r5, r6, c5 (c5a, c5ad), c6 (c6a, c6i), m5, m6i, m7i, c7i, c7g, r6g, r6i, G5, G6, x1, aws ec2 describe-instance-types, vCPU, VcpuLimitExceeded, im4gn