| Feature | WDDM | TCC | Benefit for Compute | |---------|------|-----|---------------------| | | Enabled (2s timeout) | Disabled | Run kernels of any duration | | GPU as display device | Yes (monitor output) | No | Frees resources for compute | | Memory paging | Managed by Windows | Direct GPU memory access | Lower latency, higher bandwidth | | Process isolation | Full preemption | Minimal context switching | Higher sustained throughput | | Kernel launch overhead | High (via OS) | Low (direct to GPU) | Better for many small kernels | | Remote DMA (RDMA) | Not supported | Supported (over InfiniBand/ROCE) | Essential for multi-GPU clusters |
If you have a dedicated secondary GPU (like an NVIDIA A100 or a high-end Quadro) that plugged into a monitor, use TCC . It maximizes throughput for Stable Diffusion, LLM training, or scientific simulations. 2. Gaming and Creative Work tcc wddm better
While WDDM remains the robust standard for local hardware interaction, it is fundamentally a "local" architecture adapted for remote use. | Feature | WDDM | TCC | Benefit