WDDM pages GPU memory in and out of system RAM, treating GPU VRAM like virtual memory. This leads to unpredictable performance spikes and memory fragmentation. For large datasets that should remain on the GPU (neural network weights, particle buffers), paging is disastrous.
Do you need a physical monitor or DirectX?
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├─ Yes → WDDM (only choice)
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└─ No → Do you need Remote Desktop GPU acceleration?
│
├─ Yes → WDDM (RemoteFX / RDP GPU requires WDDM)
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└─ No → Is this a pure compute server?
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└─ Yes → TCC (unquestionably better)
No technology is perfect. TCC has three limitations, but for compute users, they are irrelevant. tcc wddm better