I planned to strip down my AIO from my 280x but I had a real teathing problems, had to go to maplins for a HDMI cable (no DVI-D out), and my monitor kept saying no cable connected. Tried testing on virgin media settop box where my PC is at then went elsewhere to test on a digital tuner box. At this point my monitor played dice, but I got a backup monitor (well tv, and clear text did nothing). I am waiting for freesync 2, before I leave 60Hz. I will make sure I get a display port cable either in the box or else.
When I swapped the AIO out for the 56 I got a fan fail single tone (had it monitoring my AIO pump) and the monitor was displaying no signal ofcourse. Did a bios reset (which is quite tricky with my cabling). Going to retest my old monitor (which when plugged into the tv box produced sound), cause text is hella bad on backup and monitor/tv leans forward with no adjust. Its a Samsung syncmaster p2770hd. Maybe if I installed a specific driver it would improve.
Tried driver but got my old benq 60hz working with hdmi cable. Will strip my AIO off 280x today.