Introducing a New Size for Amazon EC2 G3 Graphics Accelerated Instances
Starting today, you can launch a smaller G3 instance – g3s.xlarge. Like other G3 instances, this new size is powered by NVIDIA Tesla M60 GPUs but is designed to be cost-effective for workloads that don’t need the high vCPU and RAM that current larger G3 instance sizes provide. The g3s.xlarge size has 4 vCPUs and 30.5 GiB of memory and is 50% lower in price compared to g3.4xlarge for Windows and 34% lower in price compared to g3.4xlarge for Linux. The below table shows all of the currently available G3 instance sizes.
Source:: Amazon AWS