SageMaker Notebook Instances now support P5en.48xl instance types

We are pleased to announce general availability of Amazon EC2 P5en.48xl instances on SageMaker notebook instances.[Amazon EC2 P5en instances](https://aws.amazon.com/ec2/instance-types/p5/) feature 8 H200 GPUs which have 1.7x GPU memory size and 1.4x GPU memory bandwidth than H100 GPUs featured in P5 instances. P5en instances pair the H200 GPUs with high performance custom 4th Generation Intel Xeon Scalable processors, enabling Gen5 PCIe between CPU and GPU which provides up to 4x the bandwidth between CPU and GPU and boosts AI training and inference performance. P5en, with up to 3200 Gbps of third generation of EFA using Nitro v5, shows up to 35% improvement in latency compared to P5 that uses the previous generation of EFA and Nitro. This helps improve collective communications performance for distributed training workloads such as deep learning, generative AI, real-time data processing, and high-performance computing (HPC) applications. Amazon EC2 P5en.48xl instances are available on SageMaker notebook instances in the AWS US East (N. Virginia and Ohio), US West (Oregon), and Asia Pacific (Tokyo) regions. Visit developer guides for instructions on setting up and using [JupyterLab](https://docs.aws.amazon.com/sagemaker/latest/dg/studio-updated-jl.html) and [CodeEditor](https://docs.aws.amazon.com/sagemaker/latest/dg/code-editor.html) applications on [SageMaker Studio](https://docs.aws.amazon.com/sagemaker/latest/dg/studio-updated.html) and [SageMaker notebook instances](https://docs.aws.amazon.com/sagemaker/latest/dg/nbi.html).