Ok here is what I've found:
I set my triplescreen with bezel comp. in catalyst (compensation is ok on windows desktop)
If I set my triplescreen res in the game options (3840*960) then:
- I have to use WF or the menus are zoomed in
- HUD is off centered to the right a lot (see ss below, can't aim anymore)
- bezel comp doesn't work at all (maybe that's why HUD is off centered. And as I have to set bezel comp to max in catalyst that's why off centering is that important for my setup)
If I set my bezel compensated res in game options (4220*1024) then:
- no need to use WF anymore as ingame menus are not zoomed in
- HUD is not off centered
- bezel comp. works halfly (I have CRTs, so big bezels to compensate. However it is fully compensated under desktop but not ingame. Ingame it's like it was compensating half my bezel size).
ps: yes, that's with eyefinity tech.