Windows 11 24H2 ships with version 3.2 of the Windows Display Driver Model (WDDM), which has significant improvements for gaming, but Microsoft’s support document (first spotted by Windows Latest) also points to NPU optimization. According to Microsoft, WDDM 3.2 is the first release to optimize NPU performance, which benefits Copilot and Recall.
Microsoft believes that parallel processing of graphics or NPU-intensive tasks is necessary. In addition, the need to handle large datasets is at an all-time high, which is why Microsoft is shipping Windows 11 24H2 with NPU-optimized WDDM 3.2.
As per the support document spotted by Windows Latest, Microsoft is adding a “dirty bit tracking” feature, which makes it faster to move data between systems when virtual machines are migrated. In the case of NPU (Neural Processing Unit), which is used for AI integration in NPU-based PCs, it helps the chip by speeding up data transfers.
This allows the AI tasks to run smoothly. Of course, these changes also help with gaming, including reduced latency in some configurations.
“Dirty bit tracking” is primarily designed to maintain the performance of VRAM (virtual memory) when data is transferred between physical hosts during the migration of VMs. In gaming, it could lead to reduced lag and better performance when a game server or instance is moved to another location.
The changelog of WDDM 3.2 is quite complex and confusing, but it mostly helps with the performance of games and AI tasks.
Let me break down the significant changes and then compare the changelog for GPU and NPU in the following table:
- Dirty Bit Tracking: In theory, this is supposed to speed up moving data between computers, but the real-life scenario of Dirty Bit Tracking is unclear…
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