| Metric | WDDM + QPC | WDDM + TCC | |--------|-------------|-------------| | GPU-present jitter | ±50–200 μs | ±5–15 μs | | VR motion-to-photon | ~25 ms | ~12 ms (with reflex + TCC) | | Audio-visual sync drift | 1 frame every few min | <1 ms over hours | | CPU overhead | High (frequent queries) | Near-zero |
TCC significantly reduces the overhead required to start a GPU task. In WDDM, every task must be scheduled alongside UI elements, which adds a layer of driver latency. Faster Memory Transfers: tcc wddm better
: A toggle within the NVIDIA App or Windows Graphics Settings that prioritizes CUDA kernel execution over Desktop Window Manager (DWM) frame updates, effectively mimicking TCC's performance gains (roughly 10-20% improvement) on a primary display card. Current Comparison: TCC vs. WDDM | Metric | WDDM + QPC | WDDM
For mixed scenarios (e.g., Windows IoT with real-time requirements), some vendors offer hybrid modes – but natively, , WDDM = flexible general-purpose . Current Comparison: TCC vs