On my TV and 2x1600x1200 monitors I have tested, only x2 works on the TV, I get no image on my monitors… Have not had the time to test anything but default setting and x doubling.
I have one ASUS 24″ LED FreeSync VG245Q, and it supports the AmigaRGB->VGA. The OSSC provides better picture for games and demos and work up to x5, but since it’s 1080P only x4 is correct. In workbench however I have to disable my monitors and run Pal Highres or lower.
On my projector, I have a VSX-LX70 receiver before the Projector and all X modes up to x5 works flawless. The Projector is only 1080P and x5 is outside the picture on top/bottom, as expected.
I have never EVER seen a better looking Amiga picture than on my 135″ projector screen with the OSSC at X4!