Single Strobe

[kresiu]

Am I right to set:
Benq Zowie XL2411 V5 (blur utility does not work)
CSGO
1440x1080
120hz
manual number of pixels 2080 1502
monitor settings via menu
blur reduction on
strobe duty 007
strobe phase 000
AND
single strobe off or on?

[kresiu]

And forget to add. I get a wierd flickering of horizontal lines in main menu, in game it is less noticable

[Falkentyne]

Use VT 1500 for 120hz.
1502 is ok at 100hz.

[kresiu]

its what I have set up.
However when i go over 330mhz i get flickering artefacts on some of the horizontal lines,
the higher the VT value the more artefacts.

[lexlazootin]

Try getting a shorter cable.

[Falkentyne]

(make SURE you are using the ToastyX pixel clock patcher please!).

Please don't try to use VT Tweaks at ANY resolution below 1920x1080.
You do not get flickering horizontal sparkling pixels unless the scaler is being pushed out of specification. This is not directly tied to the pixel clock. It's possible to go 374.40 MHz on pixel clock without any corruption, even 400 MHz at certain timings.

See for yourself.

Delete your 1440x1080

Create 1920x1080 @ 120hz
HT: 2080 (NOT 2200)
VT: 1500.

it will work without corruption. see?

If you want proof it is not the pixel clock, try this for example:
2560x1440 @ 100hz.

HT: 2641 (or 2720)
VT: 1500 or 1502

Pixel clock will be 396-400 mhz. Over DVI. No corruption right?

Now, go back and create 1440@1080 @ 60hz. Yes do what I said. 60hz.
Automatic timings.

Then enable GPU scaling.
Then run your game at 1440x1080@120hz.

it will downscale 1920x1080@120hz with your 1500 VT to 1440x1080 without corruption (because the resolution exists at 60hz, it will be gpu scaled at other refresh rates).

[Chief Blur Buster]

Advanced Users:

A few users have found it is possible to use the same large (1080p-optimized) vertical totals with lower resolutions, but it's very tricky and not always successful. Sometimes you need to use custom monitor INF files (or using ToastyX to temporarily delete the 1920x1080 modes, making 1440x1080 the highest supported mode) to make it easier for the scaler to be bypassed, and it can be card/drivers dependent. In theory it's possible to get 1440x1080 timings that looks like 1920x1080, but you need to use huge "Horizontal Totals" too. The difference of 1440 and 1920 is 480. So add 240 each to your Horizontal Front/Back Porches. Basically your Horizontal Total needs to match your planned 1920x1080 resolution, except the horizontal resolution reduction is moved over to the horizontal porches instead. In other words, take your successful large-VT 1920x1080p mode in ToastyX, remove 480 from horizontal active, and add 240 each to both the horizontal back/front porches (NOT "sync"). This will not always work with all cards or drivers but it has worked before to create a 1440x1080 with exactly the same dotclock and refresh rate as the equivalent desired 1920x1080 timing. Basically a 1440x1080 with HT2080 -- keep successful VT/HT/sync unchanged, only transfer resolution to porches, for every 2 pixel reduction in resolution, add 1 each to the two porches, to preserve the VT/HT/sync numbers.

But first, obviously, make sure you get the 1080p mode working first BEFORE you make derived modifications to it.

Fiddly, and not always worth the effort, and may not be possible on some models of monitors, but it apparently has worked before on at least one of the BENQ models (forgot which).

[Falkentyne]

Thanks, Chief !

My main problem when I tried to use high VT's at lower than native resolutions is it causes the monitor's scaling functions to not work correctly. If you notice (I'm not sure if you still have your Benq's available), if you use a 1500 VT (this applies to a 1350 VT but to a lesser extent) at 1920x1080, the monitor scaler reports the resolution as 1280x1440. (at VT 1350 it's shown as a higher horizontal but lower vertical size, I am pretty sure I listed it in the sticky thread). This causes the "Aspect" OSD setting to unlock and causes a very strange looking picture, as the screen suddenly has black bars, because it thinks 1920x1080 is smaller than 1280x1440, so the screen is changed into a converted image with vertical black bars to the left and right.

When using 1440x1080, you want to use Aspect or 1:1, so you have no interpolation, and you will have black bars to the left and right. But this doesn't work "Properly" even without a VT tweak. Aspect and 1:1 both get greyed out. You can force aspect and 1:1 to unlock by changing the VT to 1125 down from the default of 1144. Since the VT is lower, the monitor thinks the resolution is "lower" than native, so aspect and 1:1 work. This only works at 120hz however. 100hz doesn't seem to unlock at all unless you go much lower on the VT (I think 1117?), then the refresh rate says "75hz" on the monitor, and the strobing gets a little out of phase slightly.

If you use GPU scaling from native resolution, then you can avoid all of this by using the Video card control panel to set 1:1 or Aspect.

[kresiu]

(make SURE you are using the ToastyX pixel clock patcher please!).

Please don't try to use VT Tweaks at ANY resolution below 1920x1080.
You do not get flickering horizontal sparkling pixels unless the scaler is being pushed out of specification. This is not directly tied to the pixel clock. It's possible to go 374.40 MHz on pixel clock without any corruption, even 400 MHz at certain timings.

See for yourself.

Delete your 1440x1080

Create 1920x1080 @ 120hz
HT: 2080 (NOT 2200)
VT: 1500.

it will work without corruption. see?

If you want proof it is not the pixel clock, try this for example:
2560x1440 @ 100hz.

HT: 2641 (or 2720)
VT: 1500 or 1502

Pixel clock will be 396-400 mhz. Over DVI. No corruption right?

Now, go back and create 1440@1080 @ 60hz. Yes do what I said. 60hz.
Automatic timings.

Then enable GPU scaling.
Then run your game at 1440x1080@120hz.

it will downscale 1920x1080@120hz with your 1500 VT to 1440x1080 without corruption (because the resolution exists at 60hz, it will be gpu scaled at other refresh rates).

OK! Thanks Falkentyne. I will try that and I comeback with outcome!