AJA System Test Lite

macOS Mojave Beta 18A365a

MacBook Pro 15-inch 2018

Intel Core-i9 8950HK 2.9GHz 6-Core

32GB DDR4 2.4GHz

AMD Radeon Pro 560X 4GB

Intel UHD Graphics 630 1.5GB

AJA System Test Lite is a benchmarking app that tests READ/WRITE speed of a storage device as well as its respective maximum capable playback/record frame rate in various video codecs.

The frame rate results represent AJA RAW 12bit DNG, which also being a DNG is most likely close to CinemaDNG RAW. The URSA MINI 4K shoots between 24-60fps 4K to SATA III based CFast 2.0 Cards which cap at a theoretical maximum bitrate of 750MB/s, nearly 1/4 the speed of the MacBook Pro PCIe 3.0 SSD.

In order to realize 4K RAW frame rates like these, either a faster interconnect such as the proposed CFexpress is needed, or RAW compression like what Blackmagic and RED use which lowers bitrate while retaining visual quality. CFexpress uses two PCIe 3.0 lanes to provide a 2GB/s bandwidth.