CUDA™ is a revolutionary parallel computing architecture from NVIDIA that enables dramatic increases in computing performance by harnessing the power of the GPU (graphics processing unit). With millions of CUDA-enabled GPUs sold to date, software developers, scientists and researchers are finding broad-ranging uses for CUDA, including image and video processing, computational biology and chemistry, ray tracing, and much more.
Pavtube software applications now take full advantage of the NVIDIA CUDA technology and AMD Accelerated Parallel Processing (APP) to largely accelerate video encoding speed. The software now lets you take advantages of GPU acceleration and rips DVD faster than ever! Can you imagine the speed? Well, with a CUDA-enabled graphics card, the ripping speed is accelerated up to 6X (or even more) faster than before, which saves you lots of time to wait around. The advantages of CUDA based DVD Ripper software
Source: Improve DVD Ripping Speed With NVIDIA GPU Acceleration (H.265/H.264)