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.
Host specifications
| Part |
Quantity
Count Units |
Specs
SKU ID, Performance Units, etc. |
| Processor |
24 - 176 vCPUs |
AMD EPYC 9V33X (Genoa-X) [x86-64] |
| L3 Cache |
2304 MB |
|
| Memory |
768 GB |
780 GB/s |
| Local Storage |
1 Temp Disk
2 NVMe Disks |
480 GiB
1800 GiB |
| Remote Storage |
32 Disks |
|
| Network |
8 vNICs
1 InfiniBand NDR NIC |
80 Gb/s
400 Gb/s |
| Accelerators |
None |
|
Feature support
Premium Storage: Supported
Premium Storage caching: Supported
Live Migration: Not Supported
Memory Preserving Updates: Not Supported
Generation 2 VMs: Supported
Generation 1 VMs: Not Supported
Accelerated Networking: Supported
Ephemeral OS Disk: Supported
Nested Virtualization: Not Supported
Backend Network: InfiniBand NDR
Sizes in series
vCPUs (Qty.) and Memory for each size
| Size Name |
vCPUs (Qty.) |
Memory (GB) |
L3 Cache (MB) |
Memory Bandwidth (GB/s) |
Base CPU Frequency (GHz) |
Single-core Frequency Peak (GHz) |
All-core Frequency Peak (GHz) |
| Standard_HB176rs_v4 |
176 |
768 |
2304 |
780 |
2.55 |
3.7 |
3.7 |
| Standard_HB176-144rs_v4 |
144 |
768 |
2304 |
780 |
2.55 |
3.7 |
3.7 |
| Standard_HB176-96rs_v4 |
96 |
768 |
2304 |
780 |
2.55 |
3.7 |
3.7 |
| Standard_HB176-48rs_v4 |
48 |
768 |
2304 |
780 |
2.55 |
3.7 |
3.7 |
| Standard_HB176-24rs_v4 |
24 |
768 |
2304 |
780 |
2.55 |
3.7 |
3.7 |
VM Basics resources
Local (temp) storage info for each size
| Size Name |
Max Temp Storage Disks (Qty.) |
Temp Disk Size (GiB) |
Local Solid State Disks (Qty.) |
Local Solid State Disk Size (GiB) |
| Standard_HB176rs_v4 |
1 |
480 |
2 |
1800 |
| Standard_HB176-144rs_v4 |
1 |
480 |
2 |
1800 |
| Standard_HB176-96rs_v4 |
1 |
480 |
2 |
1800 |
| Standard_HB176-48rs_v4 |
1 |
480 |
2 |
1800 |
| Standard_HB176-24rs_v4 |
1 |
480 |
2 |
1800 |
Storage resources
Table definitions
- 1Temp disk speed often differs between RR (Random Read) and RW (Random Write) operations. RR operations are typically faster than RW operations. The RW speed is usually slower than the RR speed on series where only the RR speed value is listed.
- Storage capacity is shown in units of GiB or 1024^3 bytes. When you compare disks measured in GB (1000^3 bytes) to disks measured in GiB (1024^3) remember that capacity numbers given in GiB may appear smaller. For example, 1023 GiB = 1098.4 GB.
- Disk throughput is measured in input/output operations per second (IOPS) and MBps where MBps = 10^6 bytes/sec.
- To learn how to get the best storage performance for your VMs, see Virtual machine and disk performance.
Remote (uncached) storage info for each size
| Size Name |
Max Remote Storage Disks (Qty.) |
| Standard_HB176rs_v4 |
32 |
| Standard_HB176-144rs_v4 |
32 |
| Standard_HB176-96rs_v4 |
32 |
| Standard_HB176-48rs_v4 |
32 |
| Standard_HB176-24rs_v4 |
32 |
Storage resources
Table definitions
1Some sizes support bursting to temporarily increase disk performance. Burst speeds can be maintained for up to 30 minutes at a time.
Storage capacity is shown in units of GiB or 1024^3 bytes. When you compare disks measured in GB (1000^3 bytes) to disks measured in GiB (1024^3) remember that capacity numbers given in GiB may appear smaller. For example, 1023 GiB = 1098.4 GB.
Disk throughput is measured in input/output operations per second (IOPS) and MBps where MBps = 10^6 bytes/sec.
Data disks can operate in cached or uncached modes. For cached data disk operation, the host cache mode is set to ReadOnly or ReadWrite. For uncached data disk operation, the host cache mode is set to None.
To learn how to get the best storage performance for your VMs, see Virtual machine and disk performance.
Network interface info for each size
| Size Name |
Max NICs (Qty.) |
Max Network Bandwidth (Mb/s) |
| Standard_HB176rs_v4 |
8 |
80000 |
| Standard_HB176-144rs_v4 |
8 |
80000 |
| Standard_HB176-96rs_v4 |
8 |
80000 |
| Standard_HB176-48rs_v4 |
8 |
80000 |
| Standard_HB176-24rs_v4 |
8 |
80000 |
Networking resources
Table definitions
- Expected network bandwidth is the maximum aggregated bandwidth allocated per VM type across all NICs, for all destinations. For more information, see Virtual machine network bandwidth
- Upper limits aren't guaranteed. Limits offer guidance for selecting the right VM type for the intended application. Actual network performance will depend on several factors including network congestion, application loads, and network settings. For information on optimizing network throughput, see Optimize network throughput for Azure virtual machines.
- To achieve the expected network performance on Linux or Windows, you may need to select a specific version or optimize your VM. For more information, see Bandwidth/Throughput testing (NTTTCP).
Network interface info for each size
| Size Name |
Backend NICs (Qty.) |
RDMA Performance (Gb/s) |
| Standard_HB176rs_v4 |
1 |
400 |
| Standard_HB176-144rs_v4 |
1 |
400 |
| Standard_HB176-96rs_v4 |
1 |
400 |
| Standard_HB176-48rs_v4 |
1 |
400 |
| Standard_HB176-24rs_v4 |
1 |
400 |
Backend Networking resources
Accelerator (GPUs, FPGAs, etc.) info for each size
Note
No accelerators are present in this series.
List of all available sizes: Sizes
Pricing Calculator: Pricing Calculator
Information on Disk Types: Disk Types
Next steps
Take advantage of the latest performance and features available for your workloads by changing the size of a virtual machine.
Utilize Microsoft's in-house designed ARM processors with Azure Cobalt VMs.
Learn how to Monitor Azure virtual machines.