Applies to: ✔️ Linux VMs ✔️ Windows VMs ✔️ Flexible scale sets ✔️ Uniform scale sets
Azure Virtual Machine (VM) sizes are designed to provide a wide range of options for hosting your servers and their workloads in the cloud. Sizes are categorized into different families and types, each optimized for specific purposes. Users can choose the most suitable VM size based on their requirements, such as CPU, memory, storage, and network bandwidth.
This article describes what sizes are, gives an overview of the available sizes and shows different options for Azure virtual machine instances you can use to run your apps and workloads.
VM size and series naming
Azure VM sizes follow specific naming conventions to denote varying features and specifications. Each character in the name represents different aspects of the VM. These include the VM family, number of vCPUs, and extra features like premium storage or included accelerators.
VM naming is further broken down into the 'Series' name and the 'Size' name. Size names include extra characters representing the number of vCPUs, type of storage, etc.
Here's a breakdown of a 'General purpose, DCads_v5-series' size series.
1 Most families are represented using one letter, but others such as GPU sizes (NV-series, etc.) use two.
2 Most subfamilies are represented with a single upper case letter, but others (such as Ebsv5-series) are still considered subfamilies of their parent family due to feature differences.
3 If no feature letter for a CPU is listed, the series uses Intel x86-64 CPUs. If the CPU is AMD, it's listed as a. If the CPU is ARM based (Microsoft Cobalt or Ampere Altra), it's listed as p.
4 There can be any number of extra features in a size name. There could be none (Dv5-series) or there could be three (Dplds_v6-series).
5 Version numbers only appear in the size name if there are multiple versions of the same series. If you're using the first version of a series (HB-series, B-series, etc.) it's often not included in the size name.
Note
Not all sizes will have subfamilies, support accelerators, or specify the CPU vendor. For more information on VM size naming conventions, see Azure VM sizes naming conventions.
Here's a breakdown of a 'Standard_DC8ads_v5' size in the 'DCadsv5-series'
1 Most families are represented using one letter, but others such as GPU sizes (NV-series, etc.) use two.
2 Most subfamilies are represented with a single upper case letter, but others (such as Ebsv5-series) are still considered subfamilies of their parent family due to feature differences.
3 If no feature letter for a CPU is listed, the series uses Intel x86-64 CPUs. If the CPU is AMD, it will be listed as a. If the CPU is ARM based (Microsoft Cobalt or Ampere Altra), it will be listed as p.
4 There can be any number of extra features in a size name. There could be none (Dv5-series) or there could be three (Dplds_v6-series).
5 Spacers can show up multiple times in a size name such as in the ND_H100_v5-series. In this case they separate the GPU ID from the rest of the size name.
6 Version numbers only appear in the size name if there are multiple versions of the same series. If you're using the first version of a series (HB-series, B-series, etc.) it's often not included in the size name.
Note
Not all sizes will have subfamilies, support accelerators, or specify the CPU vendor. For more information on VM size naming conventions, see Azure VM sizes naming conventions.
List of VM size families by type
This section contains a list of all current generation size series with tabs dedicated to each size family. Each group has a 'Series List' column with a linked list of all available size series, These links will bring you to the family page for that series, where you can find detailed information on each size in that series or go to the series' page for a list of sizes in that series.
To learn more about a size family, click the 'family' tab under each type section. There you can read a summary on the family, see the workloads it's recommended for, and view the full family page with specifications for all series in that family.
General purpose
General purpose VM sizes provide balanced CPU-to-memory ratio. Ideal for testing and development, small to medium databases, and low to medium traffic web servers.
The 'A' family of VM size series are one of Azure's general purpose VM instances. They're designed for entry-level workloads, such as development and test environments, small to medium databases, and low-traffic web servers.
Cost Efficiency: A-series VMs are some of the most budget-friendly options available on Azure, making them a good choice for projects with limited financial resources or those that do not require high-performance compute capabilities.
General Workloads: A-series VMs are well-suited for handling basic applications, light web servers, and small databases that do not demand extensive CPU, memory, or I/O performance.
Entry-Level Applications: A-series VMs can serve as a good starting point for deploying applications that are not expected to scale significantly. They provide a platform for applications and services that require less processing power.
B family
The 'B' family of VM size series are one of Azure's general purpose VM instances. While traditional Azure virtual machines provide fixed CPU performance, B-series virtual machines are the only VM type that use credits for CPU performance provisioning. B-series VMs utilize a CPU credit model to track how much CPU is consumed - the virtual machine accumulates CPU credits when a workload is operating below the base CPU performance threshold and, uses credits when running above the base CPU performance threshold until all of its credits are consumed. Upon consuming all the CPU credits, a B-series virtual machine is throttled back to its base CPU performance until it accumulates the credits to CPU burst again.
Usage Flexibility: B-family VMs are best suited for workloads that do not require constant full CPU performance.
Ideal Applications: B-family VMs are ideal applications include web servers, proof of concepts, small databases, and development build environments.
Performance Needs: Some workloads often have burstable performance requirements, meaning they only need high performance sporadically. B-family VMs are perfect for this use case.
D family
The 'D' family of VM sizes are one of Azure's general purpose VM sizes. They're designed for a variety of demanding workloads, such as enterprise applications, web and application servers, development and test environments, and batch processing tasks. Equipped with faster processors and more memory per core than the A-series, D-series VMs offer a strong performance balance, making them suitable for applications that require both high computational power and substantial memory resources. They are particularly favored for running enterprise-grade applications, supporting moderate to high-traffic web servers, and performing data-intensive batch processing.
Balanced Performance: D-series VMs provide a solid balance between CPU capabilities and memory size, which makes them suitable for most production workloads. They are equipped with faster processors compared to the A-series and provide more memory per core.
Enterprise Applications: They are well-suited for running enterprise applications like SAP, Microsoft Dynamics, or large relational databases that require both high computational power and substantial memory.
Development and Test Environments: With their balanced resources, D-series VMs are ideal for development and testing environments where developers need to simulate production conditions closely.
Web and Application Servers: They provide the necessary resources to host web servers and application servers that experience moderate to heavy traffic, ensuring smooth and responsive user experiences.
Batch Processing: D-series VMs are efficient for handling batch processing tasks that require processing large amounts of data quickly, thanks to their fast processors and ample memory.
Gaming Servers: The high-performance capabilities of D-series VMs make them suitable for gaming servers where latency and speed are critical for a good user experience.
Compute optimized
Compute optimized VM sizes have a high CPU-to-memory ratio. These sizes are good for medium traffic web servers, network appliances, batch processes, and application servers.
To learn more about a specific size family or series, click the tab for that family and scroll to find your desired size series.
F family
The 'F' family of VM size series are one of Azure's compute-optimized VM instances. They're designed for workloads that require high CPU performance, such as batch processing, web servers, analytics, and gaming. Featuring a high CPU-to-memory ratio, F-series VMs are equipped with powerful processors to handle applications that demand more CPU capacity relative to memory. This makes them particularly effective for scenarios where fast and efficient processing is critical, allowing businesses to run their compute-bound applications efficiently and cost-effectively.
Web Servers: F-series VMs are excellent for hosting web servers and applications that require significant compute capability to handle web traffic efficiently without necessarily needing large amounts of memory.
Batch Processing: F-series VMs are ideal for batch jobs and other processing tasks that involve handling large volumes of data or tasks in a queue but are more CPU-intensive than memory-intensive.
Application Servers: Applications that require quick processing and do not have high memory demands can benefit from F-series VMs. These can include medium traffic application servers, back-end servers for enterprise applications, and other similar tasks.
Gaming Servers: Due to their high CPU performance, F-series VMs are also suitable for gaming servers where fast processing is critical for a good gaming experience.
Analytics: F-series VMs can be used for data analytics applications that require processing speed to crunch numbers and perform calculations more than they require a large amount of memory.
Memory optimized
Memory optimized VM sizes offer a high memory-to-CPU ratio that is great for relational database servers, medium to large caches, and in-memory analytics.
To learn more about a specific size family or series, click the tab for that family and scroll to find your desired size series.
E family
The 'E' family of VM size series are one of Azure's memory-optimized VM instances. They're designed for memory-intensive workloads, such as large databases, big data analytics, and enterprise applications that require significant amounts of RAM to maintain high performance. Equipped with high memory-to-core ratios, E-series VMs support applications and services that benefit from faster data access and more efficient data processing capabilities. This makes them particularly well-suited for scenarios involving in-memory databases and extensive data processing tasks where ample memory is crucial for optimal performance.
Memory-Intensive Workloads: E-family VMs are for workloads that demands a large memory footprint to efficiently handle tasks, such as simulations, large-scale computations in scientific research, or financial risk modeling.
Large Databases and SQL Servers: E-family VMs are ideal for hosting large relational databases like SQL Server and NoSQL databases that benefit from high memory capacities for improved performance in data processing and transaction handling.
Enterprise Applications: E-family VMs are suitable for resource-intensive enterprise applications, including large-scale ERP and CRM systems, where the availability of ample memory is crucial for managing complex transactions and user loads.
Big Data Applications: E-family VMs are effective for big data analytics applications that need to process vast amounts of data in memory to speed up analysis and insights generation.
In-Memory Computing: E-family VMs are great for in-memory databases (e.g., SAP HANA) that require large amounts of RAM to keep the entire dataset in memory, allowing for ultra-fast data processing and query responses.
Data Warehousing: E-family VMs provide the necessary resources for data warehousing solutions that handle and analyze large datasets, improving query performance and reducing response times.
M family
The 'M' family of VM size series are one of Azure's ultra memory-optimized VM instances designed for extremely memory-intensive workloads, such as large in-memory databases, data warehousing, and high-performance computing (HPC). Equipped with substantial RAM capacities and high vCPU capabilities, the M-family VMs support applications and services that require massive amounts of memory and significant computational power. High resource allocation makes the M-family particularly well-suited for handling tasks such as heavy SQL Server and other RDBMS workloads, complex scientific simulations, real-time data processing, and large-scale enterprise resource planning (ERP) systems, ensuring peak performance for the most demanding data-centric applications.
SQL Server workloads with high memory needs: The M-family is particularly effective for running SQL Server machines with high memory requirements, such as for online transaction processing (OLTP) or data analytics.
In-memory databases: The M-family is particularly effective for running in-memory databases that require large amounts of RAM like SQL Server, or SAP HANA.
Big data applications: The M-family is ideal for handling big data applications that need to process and analyze huge datasets in memory, improving performance and reducing the time to insights.
Data warehousing: M-family VMs provide the performance and memory needed for data warehousing applications, facilitating faster queries and better handling of large volumes of data.
Enterprise applications: The M-family supports large-scale enterprise applications, including ERP and CRM systems, which benefit from having more memory to manage larger datasets and more complex transactions efficiently.
Heavy workloads in virtualized environments: The M-family is well-equipped to handle heavy virtualized environments, offering substantial memory for hosting multiple virtual machines and applications on a single physical server.
Storage optimized
Storage optimized virtual machine (VM) sizes offer high disk throughput and IO, and are ideal for Big Data, SQL, NoSQL databases, data warehousing, and large transactional databases. Examples include Cassandra, MongoDB, Cloudera, and Redis.
To learn more about a specific size family or series, click the tab for that family and scroll to find your desired size series.
L family
The 'L' family of VM size series are one of Azure's storage-optimized VM instances. They're designed for workloads that require high disk throughput and I/O, such as databases, big data applications, and data warehousing. Equipped with high disk throughput and large local disk storage capacities, L-series VMs support applications and services that benefit from low latency and high sequential read and write speeds. This makes them particularly well-suited for handling tasks like large-scale log processing, real-time big data analytics, and scenarios involving large databases that perform frequent disk operations, ensuring efficient performance for storage-heavy applications.
Big Data Applications: L-family VMs are perfect for big data applications that need to process, analyze, and manipulate large datasets stored directly on local disks, benefiting from the high I/O performance.
Database Servers: L-family VMs provide the necessary local disk performance for SQL Server, MySQL, PostgreSQL, and other database servers that benefit from fast access to disk storage.
File Servers: L-family VMs can be used effectively as file servers within a network, handling large files and serving them with high throughput, especially useful in environments with large media files.
Video Editing and Rendering: The high disk throughput and capacity of L-family VMs are beneficial for video editing and rendering tasks, where large video files are frequently read and written to disk.
GPU accelerated
GPU optimized VM sizes are specialized virtual machines available with single, multiple, or fractional GPUs. These sizes are designed for compute-intensive, graphics-intensive, and visualization workloads.
To learn more about a specific size family or series, click the tab for that family and scroll to find your desired size series.
NC family
The 'NC' sub-family of VM size series are one of Azure's GPU-optimized VM instances. They're designed for compute-intensive workloads, such as AI and machine learning model training, high-performance computing (HPC), and graphics-intensive applications. Equipped with powerful NVIDIA GPUs, NC-series VMs offer substantial acceleration for processes that require heavy computational power, including deep learning, scientific simulations, and 3D rendering. This makes them particularly well-suited for industries such as technology research, entertainment, and engineering, where rendering and processing speed are critical to productivity and innovation.
AI and Machine Learning: NC-series VMs are ideal for training complex machine learning models and running AI applications. The NVIDIA GPUs provide significant acceleration for computations typically involved in deep learning and other intensive training tasks.
High-Performance Computing (HPC): These VMs are suitable for scientific simulations, rendering, and other HPC workloads that can be accelerated by GPUs. Fields like engineering, medical research, and financial modeling often use NC-series VMs to handle their computational needs efficiently.
Graphics Rendering: NC-series VMs are also used for graphics-intensive applications, including video editing, 3D rendering, and real-time graphics processing. They are particularly useful in industries such as game development and movie production.
Remote Visualization: For applications requiring high-end visualization capabilities, such as CAD and visual effects, NC-series VMs can provide the necessary GPU power remotely, allowing users to work on complex graphical tasks without needing powerful local hardware.
Simulation and Analysis: These VMs are also suitable for detailed simulations and analyses in areas like automotive crash testing, computational fluid dynamics, and weather modeling, where GPU capabilities can significantly speed up processing times.
NV family
The 'NV' family of VM size series are one of Azure's GPU-accelerated VM instances, specifically designed for graphics-intensive applications such as graphics rendering, simulation, and virtual desktops. Equipped with NVIDIA GPUs, NV-series VMs provide a robust platform for rendering and processing graphics-heavy tasks, making them ideal for organizations that require virtual workstations with powerful graphical capabilities. These VMs support scenarios where remote visualization, real-time collaboration, and 3D visualization are necessary, allowing users to efficiently run graphic-intensive applications directly from Azure's cloud environment.
Virtual Desktop Infrastructure (VDI): NV-family VMs are well-suited for virtual desktops that require GPU capabilities for tasks such as graphic design, video editing, and CAD applications. They provide the graphical performance necessary for smooth operation in remote desktop scenarios.
3D Visualization: NV-family VMs are ideal for running 3D applications that demand high-performance rendering, such as architectural visualizations, medical imaging, and other professional-grade graphics tasks.
Remote Graphics Work: NV-series VMs are beneficial for industries that rely on graphics-intensive software, allowing professionals to access and use applications like Adobe Photoshop, Autodesk AutoCAD, or Dassault SOLIDWORKS remotely with near-native performance.
High-Resolution Image Processing: NV-series VMs are ideal for handling extremely large vRAM applications such as high-resolution image processing and analysis. This includes tasks in fields like geospatial analysis, satellite image processing, and professional photo editing, where handling massive image files and performing complex manipulations in real-time are crucial for productivity and performance.
Video Streaming: NV-family VMs are suitable for streaming high-resolution video content, including training videos and virtual events, ensuring high-quality delivery without local hardware constraints.
High performance compute
Azure High Performance Compute 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.
To learn more about a specific size family or series, click the tab for that family and scroll to find your desired size series.
The 'HB' subfamily of VM size series are one of Azure's high-performance computing (HPC) optimized H-family VM instances. They're designed for compute-intensive workloads, such as computational fluid dynamics, finite element analysis, and large-scale scientific simulations. High-performance AMD EPYC processors and fast memory on HB-series VMs offer exceptional CPU and memory bandwidth, making them ideal for applications that require extensive computational resources to perform large-scale calculations and data processing. This makes them well suited for industries like engineering, scientific research, and data analysis where processing speed and accuracy are critical for productivity and innovation.
Computational Fluid Dynamics (CFD): HB-family VMs are ideal for simulations in fields like aerospace, automotive design, and manufacturing, where fluid dynamics calculations are intensive.
Finite Element Analysis (FEA): HB-family VMs are suitable for engineering analyses that simulate physical phenomena, requiring intensive computational power to model complex systems and materials.
Weather Forecasting: HB-family VMs can handle the massive datasets and complex simulations required for high-resolution weather modeling and forecasting.
Seismic Processing: Used in the oil and gas industry, HB-family VMs can process seismic data to help map and understand subsurface structures.
Scientific Research: HB-family VMs support a wide range of scientific research that requires large-scale mathematical modeling, including physics and computational chemistry simulations.
Genomics and Bioinformatics: HB-family VMs are also used in life sciences for genomic analysis, where large amounts of data need to be processed quickly to decode genetic information.
Learn platform sizes content
For information about pricing of the various sizes, see the pricing pages for Linux or Windows.
1 Most families are represented using one letter, but others such as GPU sizes (