Falkentyne wrote: ↑
08 Dec 2020, 15:19
144hz uses a reduced vertical total (VT), which I think is 1094 or something. You can increase the VT via a custom resolution but it will go out of range. You can try using the "S-switch" bypass, or the software tool black screen workaround (for the 165hz-240hz overclock tweaks) in the display overclocking thread, to force the monitor to try to display an image anyway. I would try using the VT range of 1350-1358
Overclocked Vertical Total FAQ
CubanLegend wrote: ↑
02 Dec 2020, 23:04
I'm wondering, I really appreciated all the custom VT modes for 60,100,120Hz, but is there a way to reduce strobe crosstalk at 144hz with a VT tweak also? Please let me know, thanks!
You can use the 220 Hz overclock trick to get 144Hz+Large Vertical Total.
For more information about overclocking 144Hz 1080p BenQ ZOWIE monitors, see The Overclocking Thread For 144Hz 1080p BenQ ZOWIE Monitors
This is much harder than a plain large vertical total, so this is for more advanced users. Instead of overclocking Hz, you can use an overclocked vertical total, even if you're not using an overclocked refresh rate.
To determine what your overclocked Vertical Total is,
1. Overclock your refresh rate.
2. Write down your MAX SCANRATE that you were able to achieve stable. This is your max overclocked Horizontal Scan Rate (e.g. 225KHz or 225000).
3. That's your overclocked budget in number of pixel rows per second
4. For lower refresh rates, your overclocked vertical total is MAX SCANRATE divided by your LOW HZ.
So if you were able to overclock to 225000 horizontal refresh rate (scan rate), then your potentially achievable overclocked vertical total at 144Hz becomes 225000/144 = Vertical Total 1562
In Custom Resolution, signal structure layout looks like this:
Vertical Total = (Vertical Sync + Vertical Back Porch + Vertical Active + Vertical Front Porch)
Vertical Total is the number of pixel rows transmitted by GPU per refresh cycle, including all offscreen pixel rows (used as refresh cycle separators -- synchronization markers -- aka Vertical Sync -- aka VSYNC). Each pixel row is transmitted raster style, one pixel row at a time, out of the video port (VGA, DisplayPort, HDMI, whatever), at the rate of the horizontal scan rate.
By conceptualizing this way, you can easily calculate your predicted overclocked Vertical Total, based on your maximum successful overclock.
Please Make Sure Your Overclock Still Supports AMA Overdrive
Try to make sure you're overclocking in a way that you can still enable AMA setting.
Please be noted, overdrive may also degrade severely during overclocking, so you may need to back off a little bit (reduce overclocking to 160Hz or 180Hz) to get better color quality and faster GtG, because GtG can slow down a bit at max-overclock when the electronics are trying to refresh pixels too fast for GtG to finish completing.
Without AMA, your GtG is too slow to prevent strobe crosstalk even with a large vertical total. So if AMA fails, the overclock won't improve strobing. Occasionally, sometimes during very extreme overclocking, AMA Premium actually sometimes becomes better than AMA High, try both when testing www.testufo.com/crosstalk
or Strobe Utility.
To Make Things Easier, Try The 1920x1079 Trick + OORBuster
Overclocking the BenQ to 200Hz and beyond is a bit tricky, because it loses the overclock when you switch resolutions or refresh rates. To minimize odds of this happening, use the automatic utilities such as "Out Of Range Buster" (OORBuster) combined with a custom resolution that only has one refresh rate (the overclocked Hz or the overclocked vertical total). That way, a game that uses that specific resolution can only use the overclocked Hz or overclocked vertical total.