The FX-series runs on the Intel® Xeon® Gold 6246R (Cascade Lake) processors. It features an all-core-turbo frequency of 4.0 GHz, 21 GB RAM per vCPU, up to 1 TB total RAM, and local temporary storage. The FX-series will benefit workloads that require a high CPU clock speed and high memory to CPU ratio, workloads with high per-core licensing costs, and applications requiring a high single-core performance. A typical use case for FX-series is the Electronic Design Automation (EDA) workload. FX-series VMs feature Intel® Turbo Boost Technology 2.0, Intel® Hyper-Threading Technology, and Intel® Advanced Vector Extensions 512 (Intel® AVX-512).
Host specifications
| Part |
Quantity
Count Units |
Specs
SKU ID, Performance Units, etc. |
| Processor |
4 - 48 vCPUs |
Intel Xeon Gold 6246R (Cascade Lake) [x86-64] |
| Memory |
84 - 1008 GiB |
|
| Local Storage |
1 Disk |
168 - 2016 GiB
40000 - 400000 IOPS (RR)
343 - 3871 MBps (RR) |
| Remote Storage |
8 - 32 Disks |
6700 - 80000 IOPS
104 - 1258 MBps |
| Network |
2 - 8 NICs |
4000 - 32000 Mbps |
| Accelerators |
None |
|
Feature support
Premium Storage: Supported
Premium Storage caching: Supported
Live Migration: Supported
Memory Preserving Updates: Supported
Generation 2 VMs: Supported
Generation 1 VMs: Not Supported
Accelerated Networking: Supported
Ephemeral OS Disk: Supported
Nested Virtualization: Supported
Sizes in series
vCPUs (Qty.) and Memory for each size
| Size Name |
vCPUs (Qty.) |
Memory (GB) |
| Standard_FX4mds |
4 |
84 |
| Standard_FX12mds |
12 |
252 |
| Standard_FX24mds |
24 |
504 |
| Standard_FX36mds |
36 |
756 |
| Standard_FX48mds |
48 |
1008 |
VM Basics resources
Local (temp) storage info for each size
| Size Name |
Max Temp Storage Disks (Qty.) |
Temp Disk Size (GiB) |
Temp Disk Random Read (RR)1 IOPS |
Temp Disk Random Read (RR)1 Throughput (MB/s) |
| Standard_FX4mds |
1 |
168 |
40000 |
343 |
| Standard_FX12mds |
1 |
504 |
100000 |
1029 |
| Standard_FX24mds |
1 |
1008 |
200000 |
2057 |
| Standard_FX36mds |
1 |
1512 |
300000 |
3086 |
| Standard_FX48mds |
1 |
2016 |
400000 |
3871 |
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.) |
Uncached Premium SSD Disk IOPS |
Uncached Premium SSD Throughput (MB/s) |
| Standard_FX4mds |
8 |
6700 |
104 |
| Standard_FX12mds |
24 |
20000 |
314 |
| Standard_FX24mds |
32 |
40000 |
629 |
| Standard_FX36mds |
32 |
60000 |
944 |
| Standard_FX48mds |
32 |
80000 |
1258 |
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_FX4mds |
2 |
4000 |
| Standard_FX12mds |
4 |
8000 |
| Standard_FX24mds |
4 |
16000 |
| Standard_FX36mds |
8 |
24000 |
| Standard_FX48mds |
8 |
32000 |
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).
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.