I use Eyfinity certified Accel mini display port to display port adaptors   to go.from my mini display port connector on my video card to the MST hub. See https://www.amazon.com/gp/aw/d/B003TSDG06/ref=ya_aw_od_pi?ie=UTF8&psc=1.

From hub to monitor I use cable matters 6 foot DP,  display port++, DP++,  to hdmi cables as.follows

https://www.amazon.com/gp/aw/d/B00K2E4QJK/ref=ya_aw_od_pi?ie=UTF8&psc=1

I tried a new csv-5400 and still have the same problem!

Any ideas? Has anyone got 5×1 portrait working with the CSV-5400?
I’ve spent a ton of money on this set-up – 5 monitors, 5 very expensive stands, csv-5400, high end PC, cables you name it. The only reason I did it was for 5×1 portrait.

Your help is greatly appreciated.

Regards,

Steve