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Applies to: ✔️ Linux VMs ✔️ Windows VMs ✔️ Flexible scale sets ✔️ Uniform scale sets
This page outlines the naming conventions used for Azure VMs. VMs use these naming conventions to denote varying features and specifications.
Naming convention explanation
[Family] + [Sub-family]* + [# of vCPUs] + [Constrained vCPUs]* + [Additive Features] + [Accelerator Type]* + [Memory Capacity]* + [Version]
| Value | Explanation |
|---|---|
| Family | Indicates the VM Family Series. For more information, see the list of VM size families by type. |
| *Subfamily | Used for specialized VM differentiations such as: B = memory bandwidth optimized C = confidential (for DC, EC, NCC series) C = compute intensive (for HC, NC, NCC series) D = AI training and inference optimized G = cloud gaming and remote desktop optimized V = visualization and graphics optimized X = extra memory |
| # of vCPUs | Denotes the number of vCPUs of the VM |
| *Constrained vCPUs | Used for certain VM sizes only. Denotes the number of vCPUs for the constrained vCPU capable size |
| Additive Features | Lower case letters denote additive features, such as: a = AMD-based processor b = remote storage bandwidth optimized d = includes a local temp disk e = encrypted; contains confidential TDX capabilities f = flat ratio (1:1) of vCPU to memory size i = isolated size l = low memory; decreased vCPU to memory ratio m = memory intensive; highest vCPU to memory ratio in a particular series n = network optimized; increased vCPU to network bandwidth ratio o = increased vCPU to local SSD storage capacity ratio p = ARM-based processor r = includes RDMA (InfiniBand) secondary network s = compatible with any premium SSD type t = tiny memory; smallest vCPU to memory ratio in a particular size |
| *Accelerator Type | Denotes the type of hardware accelerator in the specialized/GPU SKUs. Only new specialized/GPU SKUs launched from Q3 2020 have the hardware accelerator in the name. |
| *Memory Capacity | Denotes M-series memory capacity, rounded to the nearest TiB. |
| Version | Denotes the version number of the VM Family Series |
Example breakdown
[Family] + [Sub-family]* + [# of vCPUs] + [Constrained vCPUs]* + [Additive Features] + [Accelerator Type]* + [Memory Capacity]* + [Version]
Example 1: M48ds_1_v3
| Value | Explanation |
|---|---|
| Family | M |
| # of vCPUs | 48 |
| Additive Features | d = local temp disk s = Premium Storage capable |
| Memory Capacity | 974 GiB ≈ 1 TiB |
| Version | v3 |
Example 2: NV16as_v4
| Value | Explanation |
|---|---|
| Family | N |
| Subfamily | V |
| # of vCPUs | 16 |
| Additive Features | a = AMD-based processor s = Premium Storage capable |
| Version | v4 |
Example 3: NC4as_T4_v3
| Value | Explanation |
|---|---|
| Family | N |
| Subfamily | C |
| # of vCPUs | 4 |
| Additive Features | a = AMD-based processor s = Premium Storage capable |
| Accelerator Type | T4 |
| Version | v3 |
Example 4: M8-2ms_v2 (Constrained vCPU)
| Value | Explanation |
|---|---|
| Family | M |
| # of vCPUs | 8 |
| Constrained vCPUs | 2 |
| Additive Features | m = memory intensive s = Premium Storage capable |
| Version | v2 |
Next steps
Learn more about available VM Sizes in Azure.