Tcc Wddm Better [verified]

| Test | WDDM Mode (Standard) | TCC Mode | Improvement | | :--- | :--- | :--- | :--- | | | 3,450 | 4,120 | +19.4% | | CUDA Memcpy (Host to Device) | 12.4 GB/s | 25.1 GB/s | +102% (Bypasses PCIe limits imposed by WDDM) | | Kernel Launch Overhead (100k launches) | 2.4 seconds | 0.9 seconds | -62% | | Multi-GPU Scaling (2x GPUs) | 1.6x speedup | 1.95x speedup | Near-native NVLink speed |

Recent developer benchmarks show that WDDM severely penalizes memory transfers due to aggressive Windows memory management and block swapping. When handling large batches of images or text tokens, the Windows operating system constantly pages memory, which can cut transfer efficiency in half. Enrolling the card in TCC mode yields raw, unthrottled transfer speeds that match native Linux performance . 3. Disabling the Windows TDR Watchdog tcc wddm better

This is a feature of WDDM called Timeout Detection and Recovery (TDR). Windows monitors the GPU; if the GPU takes longer than a few seconds (default is usually 2 seconds) to respond to a ping from the OS, Windows assumes the card has hung and resets the driver to prevent a full system crash (BSOD). | Test | WDDM Mode (Standard) | TCC