DVDFab was recently updated to 9.1.5.9 version. One of the key update features is the speed of DVD Ripper and Blu-ray Ripper is much faster. Compared with other competitors from the same sort on the market, DVDFab is 2-4 times faster, especially when getting advantage from GPU by enabling acceleration high-techs like CUDA and Intel Quick Sync. And its output image is sharper and the output file is smaller in size. This has been tested and proved by DVDFab. The result data as follows is all based on the source and machine used in the test and different sources and hardware equipment may produce different conversion speed.

Please note that in the above table, the amazing fast speed by “Converting from ISO” for both Blu-ray and DVD source has a pre-condition that the ISO file must be saved on a hard drive.

How to set DVDFab to enable CUDA and Intel Quick Sync?
DVDFab DVD Ripper and Blu-ray Ripper (3D Plus) both support CUDA and Intel Quick Sync so that the conversion speed is amazing fast if a user’s computer is equipped to be capable of this.
If you have a NVIDIA enabled GPU or a 2nd generation Intel® Core™ processor in your computer, you can enable CUDA or Intel Quick Sync from “Common Settings” -> “A/V Codec” of DVDFab, and “Lightning-Shrink” should be enabled as well, just like what shown below.

You can also refer to http://www.dvdfab.cn/video-convert-comparison.htm about this.