dl666 wrote:Thanks Chief!
So if i wanted to max out VT using 240hz what would the settings then be?
Also, should I be using V-sync? Which settings on Ama and Dyac on Premium?
Amazing webpage but I have trouble understanding everything
Unfortunately, VT's are reduced at higher Hz.
Another way to explain the purpose of large VT's is this:
The name of the VT game is to hide LCD GtG in the blanking interval between refresh cycles, so that when the strobe backlight flashes, the fewest LCD pixels are caught visible while still in GtG transition. This can be seen in the
old highspeed video of LightBoost. BenQ XL2720Z monitors are capable of VT1502 at 1080p, which produces a 1080 vertical resolution + 422 pixel blanking interval. (1080 plus 422 = 1502). That means the monitor is able to pause for (blanking)/(VT) of a refresh cycle before beginning to refresh a new refresh cycle. At VT1502, the monitor spends 1080/1502ths (~6.0ms) of a 120Hz refresh cycle actively refreshing the LCD pixels, one row at a time, initiating their GtG transitions. Then the monitor pauses for 422/1502ths (~2.3ms) of a refresh cycle between refresh cycles. 1/120sec is 8.3ms for 1502 scanlines which means 422:1502 takes 2.3ms and 1080:1502 takes 6ms.
Unfortunately, large vertical totals requires extremely high dotclock / bandwidth if done on the GPU side. This delivers individual refresh cycles faster, to allow it to be possible to be a pause between refresh cycles large enough to let LCD pixel response finish in total darkness between strobe flashes -- the art of cramming LCD GtG into VBI. That reduces strobe crosstalk (incomplete GtG's that become visible in an unwanted way).
If you want to maximize strobe quality and minimize crosstalk; you need to:
1. Use a Hz lower than the max
2. On BenQ/Zowie, use large vertical totals
3. Have consistent framerates; framerate = refreshrate = stroberate
Please see
HOWTO: Using ULMB Beautifully or Competitively which also applies to DyAc too.
In very specific situations, you may also want to experiment with turning DyAc off, because DyAc doesn't look too good with highly fluctuating rates that are well below Hz.
DyAc comfort level scale is as follows:
[most comfortable]
1. DyAc at framerate perfectly matching refreshrate [very nice]
2. DyAc at stable framerates always above refreshrate
3. DyAc at fluctuating framerates always above refreshrate
4. DyAc at stable framerates below refreshrate
5. DyAc at fluctuating framerates below refreshrate [very harsh]
[least comfortable]
Often, turning off DyAc is preferable to situation [4]
Situation [2] or [3] is easy with VSYNC OFF in framecapped CS:GO which often runs at ~300fps.
Situation [4] or [5] is potentially fixable by using a lower Hz for DyAc
Situation [1] is prettier but laggier due to requirement for VSYNC ON to be easy. If your priority is eye comfort instead of lag -- and you want to get TestUFO-smooth with DyAc, you need VSYNC ON combined with lower Hz (e.g. 120Hz) combined with large VT trick. Unfortunately, VSYNC ON is very laggy for competitive gameplay, so that's where low-lag VSYNC ON tricks come into play. But it's wonderful if you want eye-pleasing strobe fluidity, which is perfectly fine for solo gameplay or less lag-critical gameplay.