Enhance HBv4-series VMs summary for HPC workloads

Reorganized and clarified the description of HBv4-series VMs for HPC workloads, listing specific use cases and enhancing performance details.

Author: Padmalathas

articles/virtual-machines/sizes/high-performance-compute/includes/hbv4-series-summary.md

@@ -11,6 +11,16 @@ ms.reviewer: mattmcinnes
 ms.custom: include file
 # Customer intent: As a cloud architect, I want to evaluate the HBv4-series VMs for HPC workloads, so that I can ensure they meet the performance and scalability requirements for my organization's computational tasks.
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-HBv4-series VMs are optimized for various HPC workloads such as computational fluid dynamics, finite element analysis, frontend and backend EDA, rendering, molecular dynamics, computational geoscience, weather simulation, and financial risk analysis. HBv4 VMs feature up to 176 AMD EPYC™ 9V33X ("Genoa-X") CPU cores with AMD's 3D V-Cache, clock frequencies up to 3.7 GHz, and no simultaneous multithreading. HBv4-series VMs also provide 768 GB of RAM, 2304 MB L3 cache. The 2304 MB L3 cache per VM can deliver up to 5.7 TB/s of bandwidth to amplify up to 780 GB/s of bandwidth from DRAM, for a blended average of 1.2 TB/s of effective memory bandwidth across a broad range of customer workloads. The VMs also provide up to 12 GB/s (reads) and 7 GB/s (writes) of block device SSD performance.
+HBv4-series VMs are optimized for many high-performance computing (HPC) workloads. These include:
+- Computational fluid dynamics
+- Finite element analysis
+- Frontend and backend Electronic Design Automation (EDA)
+- Rendering and graphics work
+- Molecular dynamics
+- Computational geoscience
+- Weather simulation
+- Financial risk analysis
+
+HBv4 VMs feature up to 176 AMD EPYC™ 9V33X ("Genoa-X") CPU cores with AMD's 3D V-Cache, clock frequencies up to 3.7 GHz, and no simultaneous multithreading. HBv4-series VMs also provide 768 GB of RAM, 2304 MB L3 cache. Each VM has 2304 MB of L3 cache that delivers up to 5.7 TB/s of bandwidth. This boosts DRAM bandwidth of 780 GB/s, giving an average of 1.2 TB/s of effective memory speed for many workloads. The VMs also provide up to 12 GB/s (reads) and 7 GB/s (writes) of block device SSD performance.
 
 All HBv4-series VMs feature 400 Gb/s NDR InfiniBand from NVIDIA Networking to enable supercomputer-scale MPI workloads. These VMs are connected in a non-blocking fat tree for optimized and consistent RDMA performance. NDR continues to support features like Adaptive Routing and the Dynamically Connected Transport (DCT). This newest generation of InfiniBand also brings greater support for offload of MPI collectives, optimized real-world latencies due to congestion control intelligence, and enhanced adaptive routing capabilities. These features enhance application performance, scalability, and consistency, and their usage is recommended.