Originally published at norvik.tech Introduction Explore how torch-nvenc-compress utilizes GPU NVENC silicon to enhance PCIe bandwidth, addressing multi-GPU bottlenecks in real-time applications. Understanding GPU NVENC Silicon: A Technical Overview The recent developments in torch-nvenc-compress introduce an innovative approach to overcoming the limitations imposed by Nvidia's decision to remove NVLink from the 4090 and 5090 graphics cards. By utilizing the NVENC/NVDEC silicon, which is typically idle during operations, this library effectively compresses activations and key-value (KV) caches on-the-fly, allowing for smaller bitstreams to traverse the PCIe interface. This solution addresses a critical bottleneck where splitting a model across multiple GPUs can drop effective bandwidth to approximately 30 GB/s , a significant reduction compared to the theoretical maximum.…