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 - 1,008 GiB |
|
| Local Storage |
1 Disk |
168 - 2,016 GiB
40,000 - 400,000 IOPS
343 - 3,871 MBps |
| Remote Storage |
8 - 32 Disks |
6,700 - 80,000 IOPS
104 - 1,258 MBps |
| Network |
2 - 8 NICs |
4,000 - 32,000 Mbps |
| Accelerators |
None |
|
For features supported by this series, see the Feature support section.
Sizes in series
vCPUs (Qty.) and Memory for each size
| Size Name |
vCPUs (Qty.) |
Memory (GiB) |
| Standard_FX4mds |
4 |
84 |
| Standard_FX12mds |
12 |
252 |
| Standard_FX24mds |
24 |
504 |
| Standard_FX36mds |
36 |
756 |
| Standard_FX48mds |
48 |
1,008 |
VM Basics resources
Local (temp) storage info for each size
| Size Name |
Temp Storage Disks (Qty.) |
Temp Disk Size (GiB) |
Temp Disk Random Read IOPS |
Temp Disk Sequential Read Throughput (MBps) |
| Standard_FX4mds |
1 |
168 |
40,000 |
343 |
| Standard_FX12mds |
1 |
504 |
100,000 |
1,029 |
| Standard_FX24mds |
1 |
1,008 |
200,000 |
2,057 |
| Standard_FX36mds |
1 |
1,512 |
300,000 |
3,086 |
| Standard_FX48mds |
1 |
2,016 |
400,000 |
3,871 |
Storage resources
Table definitions
- Temp disk performance depends on many factors including block size, workload patterns of read/writes, queue depth (QD), and others. Temp disk performance specifications should be viewed as best case performance numbers, assuming 4k block sizes and QD=256 for IOPS, and 256k block sizes with QD=64 for throughput. Additionally, temp disk performance often differs between read and write operations. During steady state operations, write performance is expected to be lower than read performance.
- 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 IOPS |
Uncached Premium SSD Throughput (MBps) |
| Standard_FX4mds |
8 |
6,700 |
104 |
| Standard_FX12mds |
24 |
20,000 |
314 |
| Standard_FX24mds |
32 |
40,000 |
629 |
| Standard_FX36mds |
32 |
60,000 |
944 |
| Standard_FX48mds |
32 |
80,000 |
1,258 |
Storage resources
Table definitions
Some 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 (Mbps) |
| Standard_FX4mds |
2 |
4,000 |
| Standard_FX12mds |
4 |
8,000 |
| Standard_FX24mds |
4 |
16,000 |
| Standard_FX36mds |
8 |
24,000 |
| Standard_FX48mds |
8 |
32,000 |
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.
Feature support
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.