Epiphan DVI2USB 3.0 lag test
These are tested on Dan's Storz 3D stack in 2D mode:
So, Magewell is faster overall.
Also, we measured the stack's lag using the LED timer. It was hard to read the exact number as the numbers are blurred out on the monitor, but it was around 60 ms. Given that the time for 'grab + decode + display' from the lag app is around 4.5 ms, where's the time bottleneck then?