BenQ XL2730Z - What is required for smooth 1440p @ 120Hz?

[falkentyne]

(11-08-2015 01:51 AM)ismithers Wrote:  

(11-08-2015 01:17 AM)falkentyne Wrote:  Use Google chrome for testUFO tests.

Yeah I do, I have used the UFO Tests a bit with my XL2411Z. So have BenQ just released a dud monitor then? Like, what is the take-home information from this. The monitor won't ever be usable at 120Hz with MBR on, as it will crosstalk like crazy?

Thinking about approaching BenQ and asking them for a downgrade now. I thought this monitor would be good.

it has nothing to do with that.
ULMB has the same crosstalk at 120hz.

Lightboost used accelerated scanout. You know ToastyX was the one who made the strobelight program for lightboost. Lightboost used the equivalent of "Vertical total 1497-1502" on Lightboost monitors to accelerate the scanout (vertical blanking period increased) to lower crosstalk. Benq blur reduction allowed this due to a firmware "bug". The VT would use the same type of effect as Lightboost mode but Benq admitted this was an unintended "bug" with the firmware and the monitor scaler that was exploited on blurbusters.

XL2730Z uses a new scaler so the VT tweaks don't work anymore.

Do you still have your XL2411Z?
You can see exactly what the crosstalk is on XL2730Z on your XL2411Z by creating a custom display scaled resolution.

2560x1440
Front porch 48, 3
Sync width 32, 5
Horizontal total: 2641
vertical total: 1502
Refresh rate: 100hz.

Then you can run your XL2411Z at 2560x1440@100hz and see the crosstalk. Yes the VT Tweak is active (VT 1502) but notice the resolution increase CANCELS the effect of the VT tweak!

120hz won't work over DVI; pixel clock exceeds DVI limitations and scaler limits for XL2411z.
It get an image over displayport but there is too much image corruption (ToastyX said its a scaler limitation; same artifacts happen on some Qinx panels when trying to run 2560x1440@120hz, but that can be fixed on Qinx by lowering vertical total to <1460. Only benq firmware bug allows this to work and VT can't go below 1497.