as seen the cf card is only being access @ UDMA 6 which limit to 80MB/s thou the card is capable of UDMA 7,
The reel bottleneck of this isnt the cf card, its the camera in all cases 5D2, 5D3 and 5D4.
UDMA6 is 133mb/s not 80? UDMA7 is 167mb/s.
I don’t know what the 5D2 writespeed is, 80 as you say but thats because of the cameras interface. As same with the 5D3 maxing out at around 90-100mb/s write, even with a 160mb/s cf card inside. The 5D4 maxes out at 105mb/s. In 14 bit raw all those cameras will be limited to around 1080p cause of bandwith in camera interface. Shure 10 bit and 12 bit get you to higher resolution, but max of all these cameras will be different and 5D4 won’t go above 105mb/s when solved.
Just my thought, worth looking into, if iam not totally wrong.