Hi,
I am just trying to get my monitors native resolution to work on my MK3, but as you can see it causes strange horizontal lines. I have tried different HDMI cables. Currently using a very high quality gold Belkin. I am sure it is something in my settings that must be causing it. I am using HDMI>DVI (no converter or adaptor, all one cable) & have made sure to tick 'pure DVI mode' in the settings. I also tried to set up on another monitor and was getting similar issues at the 1600x1200 edid on that one too (made sure to dl the new edid in the options etc). Not sure what is wrong...
My main monitor for Amiga is an NEC Multisync LCD2170NX