# Select a supported Hyper-V GPU partition count

> Can administrators choose an arbitrary number of partitions for a GPU?

- Canonical URL: https://update.dsesecurity.com/updates/dse-20260908-211-select-a-supported-hyper-v-gpu-partition-count/
- Publisher: Detection Systems & Engineering (DSE Security)
- Author: DSE Security Editorial Team
- Published: 2026-09-08T18:13:40+00:00
- Modified: 2026-09-08T18:29:33+00:00
- Last reviewed by DSE: 2026-09-08
- Resource type: Guide
- DSE priority: Information
- Topics: Business Continuity, IT
- Reading time: 1 minutes

## What you need to know

Can administrators choose an arbitrary number of partitions for a GPU?

## Potentially affected

Administrators planning GPU partitioning on Windows Server 2025 Hyper-V hosts.

## DSE recommendation

Build a placement plan using the counts reported as valid for the installed GPU.

## Article

## Source facts

Microsoft requires Windows Server 2025 on a GPU-partitioning host; the documented clustered live-migration scenario requires Datacenter. The GPU manufacturer defines the valid partition counts, and administrators select from that supported set rather than inventing a count. The Windows Admin Center procedure requires its GPUs extension at version 2.8.0 or later. [Microsoft Learn](https://learn.microsoft.com/en-us/windows-server/virtualization/hyper-v/partition-assign-vm-gpu).

## Applicability

Identify the actual GPU model, driver, host edition, and management tooling before dividing capacity among guests. Treat a requested number of workloads as a planning input, not evidence that the hardware supports that many partitions. Confirm the source requirements for the intended topology.

## DSE recommendation

Build a placement plan using the counts reported as valid for the installed GPU. Have the workload owner describe the expected demand per guest and choose a supported count for an initial trial. Record which guests will receive partitions and how assignments will be reversed. Keep this plan separate from dedicated-device assignment, which addresses a different allocation method.

## Verification

Inspect the available counts and resulting partition configuration on each intended host. Confirm the management view recognizes partitioning before assigning a guest. Exercise the representative workload and record its behavior at the chosen partition size; do not present a successful assignment alone as a performance qualification.

## Official references

[Microsoft Learn: Partition and assign GPUs to a virtual machine in Hyper-V](https://learn.microsoft.com/en-us/windows-server/virtualization/hyper-v/partition-assign-vm-gpu). Source reviewed September 8, 2026.

## Primary reference

- Name: Partition and assign GPUs to a virtual machine in Hyper-V
- Authority: Microsoft Learn
- URL: https://learn.microsoft.com/en-us/windows-server/virtualization/hyper-v/partition-assign-vm-gpu
- Source publication date: Not stated by the source

## Citation and use

Preferred citation: “Select a supported Hyper-V GPU partition count,” DSE Security, https://update.dsesecurity.com/updates/dse-20260908-211-select-a-supported-hyper-v-gpu-partition-count/
Publishing principles: https://update.dsesecurity.com/updates/dse-updates-editorial-methodology/
Usage and citation policy: https://update.dsesecurity.com/usage/
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