In TCC mode, the GPU ignores the Windows display stack. There is no context switching. For thousands of small kernel launches (common in RNNs or reinforcement learning), TCC can be purely by removing OS overhead.
Choose consciously. Measure twice. Your latency will thank you.
Standard GeForce gaming cards (e.g., RTX 4080, RTX 4090) generally do not support TCC mode natively via the standard driver panel, as they are hardcoded to operate under WDDM. How to Switch Between WDDM and TCC
To give you exact steps on how to switch your secondary GPU to TCC mode, let me know: tcc wddm better
When comparing (Tesla Compute Cluster) and WDDM (Windows Display Driver Model) modes for NVIDIA GPUs, TCC is widely considered better for pure compute and high-performance computing (HPC) workloads. Comparison Table TCC (Tesla Compute Cluster) WDDM (Windows Display Driver Model) Primary Use High-performance computing, AI training, headless rendering Desktop display, 3D graphics (DirectX, OpenGL) Kernel Overhead Significantly lower; minimizes OS software layers Higher; OS maintains control of the GPU for display RAM-to-GPU Speed Faster; comparable to Linux performance
Here is the damage that architecture does to compute performance:
WDDM requires kernel launches to go through the Windows OS driver stack, which introduces latency. TCC bypasses much of this, communicating more directly with the GPU. This means that for small, frequent kernel launches, TCC offers faster turnaround times. B. No Timeout Detection and Recovery (TDR) In TCC mode, the GPU ignores the Windows display stack
Because WDDM reserves GPU resources for the Windows display subsystem, the GPU is never 100% dedicated to your compute tasks. As one NVIDIA developer forum user noted, "WDDM mode is less efficient — Windows does use some VRAM and computation power for its own purposes, so TCC is more preferable". In TCC mode, every compute unit and every byte of VRAM is available for your application.
GPGPU computing, CUDA simulations, deep learning training, and headless servers.
If you’re convinced TCC is better, here is how to enable it. Choose consciously
Updated for NVIDIA Driver R555+ and Windows 11 23H2.
: Mandatory if the GPU is physically connected to your monitor.
Warning: On consumer GeForce cards (like the RTX 4090), TCC mode is often locked by NVIDIA. This feature is primarily reserved for Enterprise and Workstation hardware. If you'd like, I can help you: if your specific GPU supports TCC Troubleshoot performance drops in WDDM Set up a multi-GPU configuration for AI or rendering