Note that system, configuration and others may influence the performance result. According to NVIDIA's test, NVENC-based H.264 encoding is 5x faster than CPU-based x264 encoding by offloading compute-intensive task from CPU. Meantime, the quality of NVENC is the same as CUDA. NVENC hardware accelerated encoder, the specialized circuitry for video encoding, is up to four times faster than CUDA encoding for newer graphics cards and consumes less power at the same time. NVENC introduced in 2012 is one of the key features of NVIDIA's Video Codec SDK. The fastest CUDA-based video converter, MacX Video Converter Pro transcodes 3846x2160 4K video with up to 150fps on iMac of 2013 (16G 1600MHz memory, and NVIDIA GeForce GT755M 1GB graphics).
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