mega necro, but i have an old, original, QNIX QX2710.
I didn't have any luck with 'passive' displayport to DVI adapters. I needed an active one that used a USB for extra power. I used this one (or maybe an older model) from Club 3D...
greetings from the future, now in 2022 they have a "23" model.
https://www.dell.com/en-au/shop/dell-ultrasharp-30-usb-c-hub-monitor-u3023e/apd/210-bebq/monitors-monitor-accessories