However, for researchers, data scientists, and high-frequency traders, the road less traveled——is the superior choice.
TCC vs. WDDM: Why TCC Mode Is Better for High-Performance Compute tcc wddm better
: Large data transfers between RAM and GPU (common in LLM "block swapping") are reportedly up to in TCC mode compared to WDDM. When used in a remote session (e
When used in a remote session (e.g., RDP), WDDM relies on the operating system to "capture" the desktop image after it has been rendered. This creates a "render-capture-encode-transmit" pipeline. TCC bypasses this, leading to faster execution for
Example numbers (RTX 4090, 1440p@240 Hz, VR off): | Metric | TCC Off | TCC On | |--------|---------|--------| | Present-to-photon jitter | 0.28 ms | 0.09 ms | | Max frame time spike (0.1%) | 2.1 ms | 0.7 ms |
WDDM introduces significant latency because every GPU command must pass through the Windows graphics stack. TCC bypasses this, leading to faster execution for small, frequent kernels.
| Feature | WDDM (Standard RDP/VNC) | TCC (Teradici PCoIP) | Winner | | :--- | :--- | :--- | :--- | | | Highly efficient, low overhead. | Efficient, but arguably overkill. | WDDM (Cost/Value) | | CAD / Engineering | Potential latency, text compression artifacts. | Lossless text, responsive 3D manipulation. | TCC | | Content Creation | Color space shifting; banding. | High-bit depth support; color accuracy. | TCC | | Bandwidth Sensitivity | Aggressive lossy compression. | Adaptive, but maintains fidelity. | TCC (Quality) / WDDM (Volume) |