Before doing this, create a variable called $LocationPath and set it equal to the device’s location path. Once you know the location path, you’ll need to complete the discrete device assignment through PowerShell. Choose the Location Path option from the list of properties.Select the properties sheet’s Details tab.Right-click on the device and select the Properties command from the shortcut menu.To find the location path, follow these steps: To perform a discrete device assignment, you’ll need to know the device’s location path. I’ll now briefly explain how you can enable discrete device assignments. RemoteFX vGPU has a limit of 30 frames per second (FPS), while discrete device assignments have a limit of 60 FPS. And if you’re using the GPU for graphical applications, discrete device assignments will deliver a higher frame rate. But if this isn’t the case, this method does have its perks.įor instance, when opting for this method, the GPU won’t have the RemoteFX vGPU’s 1 GB limit. If you have a high-VM density environment, it wouldn’t be practical to dedicate a single GPU to a single VM. Unlike RemoteFX vGPU, which can share a GPU across multiple VMs, a discrete device assignment dedicates a physical GPU to a single VM.Īt first, this may seem like a less-than-desirable method for GPU allocation. If your system supports RemoteFX vGPU, the Add Hardware setting for VMs will include a RemoteFX 3D Graphics Adapter option. Once you do, simply highlight it and click “Add”. But you should still be able to find it in your VM’s device list. If you have a supported operating system (OS) but can’t use RemoteFX vGPU, the support for this technology was most likely removed by an update. Keep this in mind if you decide to go with this method. This isn’t the case for discrete device assignments.īut it’s worth noting that RemoteFX vGPU limits each VM to use only 1 GB of dedicated video RAM. RemoteFX vGPU allows multiple virtual machines to share that one GPU. Suppose for a moment that a Hyper-V host contains only a single GPU. This is because many security vulnerabilities plagued this technology.īut why would you want to use RemoteFX vGPU if it’s discontinued? The main reason is that it’s well suited to high-VM density environments. It’s also important to note that Windows recently removed RemoteFX vGPU, so you won’t find support for it in Windows 11 or Windows Server 2022. You’ll need a machine running Windows 7 Ultimate or Enterprise, or Windows Server 2008 R2 SP1 or higher to use it. Since then, however, RemoteFX has gained many other capabilities-including GPU redirection through a feature known as RemoteFX vGPU.īut not all Windows versions support RemoteFX vGPU. When the technology was first introduced in Windows Server 2008 SP1, it was best known for its ability to redirect USB devices to a virtual machine. RemoteFX is essentially an extension of Microsoft’s Remote Display Protocol (RDP). Let’s discuss each method in further detail, starting with RemoteFX. So you’ll have to weigh your use case when deciding which method to use. Unfortunately, neither option is suitable for every situation. The other option is to use a discrete device assignment. Let’s dive right in! 2 GPU Assignment MethodsĪs mentioned earlier, Hyper-V provides two different options for assigning GPUs to virtual machines. I’ll also explain how each method impacts performance and security. In this article, I’ll take you through these two methods. But did you know you can assign GPUs to Hyper-V VMs in two different methods? Each method greatly impacts how you can use the GPU and your company’s security. As such, being able to allocate GPUs to virtual machines (VMs) is a must. Companies use GPUs for graphically intensive workloads and workloads that leverage machine learning (ML) capabilities. At the time, relatively few workloads required GPUs-and those that did typically weren’t a good fit for virtualized environments. When server virtualization first gained popularity, graphics processing unit (GPU) assignments were barely a consideration. How will you assign GPUs to your Hyper-V virtual machines?
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