High performance compute VM sizes

The A8-A11 and H-series sizes are also known as compute-intensive instances. The hardware that runs these sizes is designed and optimized for compute-intensive and network-intensive applications, including high-performance computing (HPC) cluster applications, modeling, and simulations. The A8-A11 series uses Intel Xeon E5-2670 @ 2.6 GHZ and the H-series uses Intel Xeon E5-2667 v3 @ 3.2 GHz.

Azure H-series virtual machines are the next generation high performance computing VMs aimed at high end computational needs, like molecular modeling, and computational fluid dynamics. These 8 and 16 core VMs are built on the Intel Haswell E5-2667 V3 processor technology featuring DDR4 memory and local SSD based storage.

In addition to the substantial CPU power, the H-series offers diverse options for low latency RDMA networking using FDR InfiniBand and several memory configurations to support memory intensive computational requirements.

H-series

ACU: 290-300

Size CPU cores Memory: GiB Local SSD: GiB Max data disks Max disk throughput: IOPS Max NICs / Network bandwidth
Standard_H8 8 56 1000 16 16 x 500 2 / high
Standard_H16 16 112 2000 32 32 x 500 4 / very high
Standard_H8m 8 112 1000 16 16 x 500 2 / high
Standard_H16m 16 224 2000 32 32 x 500 4 / very high
Standard_H16r* 16 112 2000 32 32 x 500 4 / very high
Standard_H16mr* 16 224 2000 32 32 x 500 4 / very high

*RDMA capable


A-series - compute-intensive instances

ACU: 225

Size CPU cores Memory: GiB Local HDD: GiB Max data disks Max data disk throughput: IOPS Max NICs / Network bandwidth
Standard_A8* 8 56 382 16 16x500 2 / high
Standard_A9* 16 112 382 16 16x500 4 / very high
Standard_A10 8 56 382 16 16x500 2 / high
Standard_A11 16 112 382 16 16x500 4 / very high

*RDMA capable


Size table definitions

  • Storage capacity is shown in units of GiB or 1024^3 bytes. When comparing 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.
  • Maximum network bandwidth is the maximum aggregated bandwidth allocated and assigned per VM type. The maximum bandwidth provides guidance for selecting the right VM type to ensure adequate network capacity is available. When moving between Low, Moderate, High and Very High, the throughput will increase accordingly. Actual network performance will depend on many factors including network and application loads, and application network settings.

Other sizes

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