CYP QU-DV12DL, Operation Manual, Page: 8 / 16

8
6.2 rear panel
Dual Link DVI OUT Dual Link DVI OUT
1 2
2
1
Dual-link DvI out 1&2
Connect to DVI Dual Link displays with Dual Link DVI cables.
Note:
The device will detect OUT 1 as the primary EDID information
when both outputs are connected with an active monitor. However,
when only 1 output is detected then the device will treat that as the
primary EDID information.