E-Cycles is an optimized version of Cycles for CUDA GPUs. It renders up to 2.7x faster than latest official version out of the box and up to 14x faster using new options and presets. It's available on Windows, Linux and Mac based on latest 2.8x or latest 2.79x. Today you can get all 2019 updates with 50% off.
Render much faster, even a remote render farm is slower in most cases due to upload and download time is slower. Here, the 2.79x option for pre-processing time is used as well as the new April update (beta) features too:
The final video with the march update of E-Cycles on a single 1080Ti (20sec per frame inclusive pre-processing and compositing):
original scene from Evermotion
Render times out of the box on different scenes (open the file, hit render):
times on Windows
Easily choose between speed and quality thanks to presets. Here 47sec to 11sec in one click:
original scene from Mike Pan
If you prefer quality to speed, you can use the speedups to render with even more bounces, detailed textures, lights, samples, full caustics, etc.
Renders courtesy of Albert Shamseev:
Render good previews with the new AI denoiser even at very low samples (16 spp here):
the original noisy image:
The new denoiser version:
Original scene from cgstrive.