120/144hz monitors timings

[Q83Ia7ta]

Will be glad to see 120Hz and 144Hz timings of yours 144Hz monitor. I hope will do some input lag tests when DVI splitter will arrive.
Here is timing of mine BenQ XL2411T (first revision):

Code: Select all

Detailed timing #2....... 1920x1080p at 120Hz (16:9)
Modeline............... "1920x1080" 285,500 1920 1968 2000 2080 1080 1083 1088 1144 +hsync -vsync
Detailed timing #4....... 1920x1080p at 144Hz (16:9)
Modeline............... "1920x1080" 317,490 1920 1944 1976 2008 1080 1083 1088 1098 +hsync +vsync

Acer Predator GN246HL aka Acer Predator GN246HLBbid:

Code: Select all

Detailed timing #2....... 1920x1080p at 120Hz (16:9)
Modeline............... "1920x1080" 285,500 1920 1968 2000 2080 1080 1083 1088 1144 +hsync -vsync
Detailed timing #3....... 1920x1080p at 144Hz (16:9)
Modeline............... "1920x1080" 325,080 1920 1944 1976 2056 1080 1083 1088 1098 +hsync +vsync

BenQ XL2411Z:

Code: Select all

Detailed timing #2....... 1920x1080p at 120Hz (16:9)
Modeline............... "1920x1080" 285,500 1920 1968 2000 2080 1080 1083 1088 1144 +hsync -vsync
Detailed timing #3....... 1920x1080p at 144Hz (16:9)
Modeline............... "1920x1080" 325,080 1920 1944 1976 2056 1080 1083 1088 1098 +hsync +vsync

ASUS PG248Q:

Code: Select all

  Detailed timing #4....... 1920x1080p at 144Hz (16:9)
    Modeline............... "1920x1080" 346,500 1920 1968 2000 2080 1080 1083 1088 1157 +hsync -vsync
  Detailed timing #5....... 1920x1080p at 170Hz (16:9)
    Modeline............... "1920x1080" 414,250 1920 1968 2000 2080 1080 1083 1088 1172 +hsync -vsync
  Detailed timing #6....... 1920x1080p at 180Hz (16:9)
    Modeline............... "1920x1080" 441,000 1920 1968 2000 2080 1080 1083 1088 1178 +hsync -vsync

Copying timings is easy by using EnTech Monitor Asset Manager 2.9 free software.

About DVI Splitter

https://www.dx.com/p/dir-016-dvi-male-t ... -cm-229850

[Chief Blur Buster]

I look forward to seeing your results! Also test the large vertical total tweaks (VT1350, VT1500, often used by BENQ Z-Series users) as they can reduce input lag slightly.

[Q83Ia7ta]

I look forward to seeing your results! Also test the large vertical total tweaks (VT1350, VT1500, often used by BENQ Z-Series users) as they can reduce input lag slightly.

I look forward to seeing 120/144hz monitors timings from you
I didn't know that VT tweaks applies to regular resolution i thought only for BenQ MBR. Thank you.

[Chief Blur Buster]

I look forward to seeing 120/144hz monitors timings from you
I didn't know that VT tweaks applies to regular resolution i thought only for BenQ MBR. Thank you.

They can apply to regular resolutions on certain monitors -- not all monitors. Only if they're real-time scanout (Instant Mode), since it requires that the scanout goes at the same speed as the pixels coming off the cable -- and VT tweaks actually accelerate the scanout via a higher dotclock at the same resolution.

The large vertical total tweak would mainly help VSYNC ON situations more than VSYNC OFF situations. I wouldn't bother with the VT tweaks during VSYNC OFF. This is because of the nature of waiting for the blanking interval, and the accelerated scanout comes immediately after the blanking interval, so the timing of VSYNC ON means the VT tweaks would mainly help in reducing input lag of VSYNC ON.

The lowest lag VSYNC ON on a flat panel monitor, would probably be the combination of triple buffering + VT1502 tweak or the in-game cap (fps_max) + VT1502 tweak, specifically on the BENQ Z-Series which is friendly to the vertical total tweak of accelerated scanout (via higher dotclock at same refresh). This would reduce the average input lag of VSYNC ON to less than half a frame of lag, almost as good as VSYNC OFF, for the tearing-haters. This won't work on all monitors, not all LCDs automatically do a faster scanout at the same resolution, via higher dotclocks at the same resolution and same refresh rate (via padding dotclock the end of a refresh in the form of a larger blanking interval). Normally that is for another purpose (less strobe crosstalk), but it does actually slightly lower lag of VSYNC ON. Doing the largest possible vertical total tweak (VT1502 at 120Hz), reduces the 120Hz scanout from 8.3ms down to 6.1ms, saving over 2ms of input lag from the bottom edge of screen during VSYNC ON, and saving over 1ms of input lag from screen center. Alas, the large VT tweaks don't work at 144Hz, but it's interesting how the VT1502 tweak (Vertical Total of 1502 pixels in ToastyX CRU or NVIDIA Custom Resolution, after the ToastyX Pixel Clock Patcher) at 120Hz permits a 6.1ms scanout at 120Hz, while 144Hz is a 6.9ms refresh cycle. For this reason, I find it interesting I can't reduce 144Hz scanout down to 6.1ms, like I can with 120Hz -- I wonder why? I do not know if this ends up making VSYNC ON 120Hz lower-lag than VSYNC ON 144Hz, though -- I'd love to see input lag tests.

[Q83Ia7ta]

For this reason, I find it interesting I can't reduce 144Hz scanout down to 6.1ms, like I can with 120Hz -- I wonder why? I do not know if this ends up making VSYNC ON 120Hz lower-lag than VSYNC ON 144Hz, though -- I'd love to see input lag tests.

Thank you again for so detailed answer.
At 1920x1080@144Hz horizontal scan rate hits monitor's specifications ~160kHz and increasing VT leads to increasing of horizontal scan rate too. But I almost sure you already know this.

[Chief Blur Buster]

At 1920x1080@144Hz Horizontal scan rate hits monitors specifications ~160kHz and increasing VT increases horizontal scan rate. But I almost sure you already know this.

Yep - There's more horizontal scanrate during VT1502 at 120Hz than at Reduced VT during 144Hz

[Q83Ia7ta]

I'd love to see input lag tests.

Coz of passive splitter it's only 60Hz but better than nothing: http://forums.blurbusters.com/viewtopic.php?f=2&t=982

[Q83Ia7ta]

Added ASUS PG248Q.