No image with VGA666 using default timings, but these timings works OK.

[K-rnivoro]

I'm using a VGA 15 KHz LCD Philips TV, hdmi_timings=320 1 16 30 34 240 1 2 3 22 0 0 0 60 0 6400000 do not work, however hdmi_timings=320 1 10 30 40 240 1 6 5 12 0 0 0 60 0 6400000 1 do work perfect in my Philips monitor.
I just have to try with a real CRT monitor, but I need to combine H-Sync and V-Sync for that.

[K-rnivoro]

I connected a CRT PVM Sony monitor and default timings work OK.

[xovox]

This isn't VGA VGA, it's RBG over VGA so if your screen doesn't support it then it won't sync AFAIK

Do games display ok?