Windows 11 will soon let you pick how much unified memory is reserved for graphics and AI. The feature is hidden in a recent Windows Insider build (29648) and was discovered by X user @XenoPanther.
Unified memory is high-bandwidth memory that can be shared between a CPU, GPU, and other processors. Traditionally, PCs with discrete graphics cards have dedicated VRAM (video memory) that lives separately from other memory.
Unified memory is still relatively new to PCs. The upcoming NVIDIA RTX Spark lets you use up to 128GB of unified RAM. AMD's Ryzen AI Max already features unified RAM.
Apple popularized the concept of unified memory with its M-Series chips, though the technology is not exclusive to Apple.
If the unified memory feature in testing rolls out, Windows 11 will have a key differentiator from macOS.
Microsoft's new feature lets Windows 11 users "reserve additional unified memory for graphics and AI intensive games and applications." The setting would help ensure smooth performance for certain types of workloads that require a lot of memory.
Normally, Windows manages shared memory dynamically, shifting resources back and forth as apps demand them. That approach works fine for general multitasking, but it runs into problems with heavy workloads like local AI inference or 3D gaming.
When memory is shared like that, background OS tasks and apps can contend for the same pool of RAM. That competition can cause latency spikes, frame drops, or total out-of-memory crashes when you're trying to run something demanding.
By letting users reserve memory, workloads with high demands for graphics and AI have uninterrupted access to high-speed memory.
The feature is not finished and has not been announced by Microsoft, so it requires some extra work to see. You can force it to appear using ViveTool.
I'd recommend waiting until the feature enters testing or even ships to general users before using it. In most cases, it's worth letting Microsoft work out any issues and polish the experience rather than use a hidden feature.
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