Windows 11 24H2 introduces version 3.2 of the Windows Display Driver Model (WDDM), a release that promises substantial enhancements for gaming enthusiasts and developers alike. According to a support document recently highlighted by Windows Latest, this iteration marks a significant milestone with its optimization for Neural Processing Units (NPUs), a feature that stands to benefit applications like Copilot and Recall.
Microsoft emphasizes the importance of parallel processing for graphics and NPU-intensive tasks, especially in an era where managing vast datasets has become increasingly critical. The inclusion of WDDM 3.2 in Windows 11 24H2 is a strategic move to address these demands effectively.
Among the noteworthy features introduced is “dirty bit tracking,” designed to streamline data transfers during virtual machine migrations. This functionality is particularly beneficial for NPU-based PCs, enhancing the efficiency of AI tasks by accelerating data movement. The implications for gaming are equally promising, as this feature could lead to reduced latency in certain configurations.
Dirty bit tracking aims to maintain optimal performance of video memory (VRAM) during data transfers between physical hosts, which is crucial when migrating game servers or instances. This transition could translate into smoother gameplay experiences with minimized lag.
While the changelog for WDDM 3.2 may appear intricate, its core improvements are centered around enhancing the performance of both gaming and AI tasks. Below is a breakdown of the significant changes:
- Dirty Bit Tracking: Designed to expedite data movement between systems, its real-world impact on gaming remains to be fully understood, though it holds potential for addressing latency issues.
- Live Migration of Different GPU-P Devices: This feature aims to reduce downtime during the transfer of game or AI tasks, primarily benefiting chipmakers rather than end users.
- GPU Native Fence Synchronization Object: By allowing the GPU to manage engine-to-engine synchronization, this change alleviates CPU load, potentially enhancing overall device performance.
- Conditional Interrupt Notification: A power-saving feature that contributes to efficiency.
- Fence Value Storage in GPU’s Local Memory: This speeds up game response times.
- User-Mode Work Submission (In-Progress): Facilitates direct task submission to the GPU, accelerating processing times.
- D3D12 Video Encoding DDI Extension: Enhances video quality in gaming applications.
- TDR (Timeout Detection and Recovery) Debugging: Improves stability and debugging capabilities for games.
New features in Windows 11 24H2 WDDM 3.2 for GPU and NPU
| Feature | Helps GPU (Gaming) | Helps NPU |
|---|---|---|
| Dirty Bit Tracking | Reduces lag during server migrations | Speeds up data transfers for AI tasks |
| Live Migration of Different GPU-P Devices | Minimizes game interruptions during resource movement | Reduces downtime during AI task migrations |
| GPU Native Fence Synchronization Object | Improves game rendering and performance | Enhances synchronization and power efficiency |
| – GPU Wait on Monitored Fence Value | Smoother game graphics | Faster processing without CPU involvement |
| – Conditional Interrupt Notification | Better performance and battery life | Saves power efficiently |
| – Fence Value Storage in GPU’s Local Memory | Faster game responses | Speeds up synchronization processes |
| User-Mode Work Submission (In-Progress) | Faster and smoother game graphics | Reduces delays in AI task processing |
| D3D12 Video Encoding DDI Extension | Supports better video encoding for games | NA |
| Feature Support Detection | Helps identify supported features for gaming | NA |
| TDR (Timeout Detection and Recovery) Debugging | Provides better stability and debugging for games | NA |
It is essential to note that these enhancements are compatible solely with WDDM 3.2 drivers for GPUs and NPUs. Currently, Windows 11 24H2 with WDDM 3.2 is exclusive to Copilot+ PCs, but sources indicate that a broader rollout for consumers with Intel and AMD hardware is anticipated by the end of September.
