Amazon EC2 z1d instances deliver a sustained all core frequency of up to 4.0 GHz, the fastest of any cloud instance. z1d instances feature a custom Intel® Xeon® Scalable processor that can run all cores at up to 4.0 GHz sustained. z1d instances include up to 1.8TB of local instance storage and are available in 6 sizes with up to 48 vCPUs and 384 GiB memory. Support for a z1d bare metal instance size will be available soon.