Side note about another undocumented purpose of Large Vertical Totals:taisel wrote:This finding suggests people can do the large vertical totals trick on the 144hz mode, although there is no point, as this isn't a strobing monitor. Maybe save it for a newer version that does when it comes out.
Large Vertical Totals (via Front Porch padding) also reduce the input lag of VSYNC ON via a "Quick Frame Transport" behaviour. This is what the new HDMI 2.1 QFT protocol really is -- it's essentially a high dotclock accelerating the delivery of refresh cycles. The same thing happens with Large Vertical Totals if you put Active near the beginning of refresh cycles and pad after it (e.g. Front Porch).
So Large Vertical Totals can be useful for a low-lag 60Hz VSYNC ON mode (~VT4300 or thereabouts at 60Hz -- a whopping four times Vertical Total as 240Hz). This can improve the latency of the 60Hz mode of a 240Hz monitor.
Too bad video game consoles won't (currently) support this -- this is only good for a lower-lag fixed-hz 60Hz mode.