Originally Posted by Seyumi
I remember getting scan-lines on the first overclockable 1440p IPS monitor the Overlord Tempest (same thing as the Korean Catleap monitors). The lines became more prominent the more it over overclocked past 60hz. My complaints were quickly squashed by all the "elite" FPS fanboys who didn't care about anything except faster FPS. I know people have linked this to the G-sync module but it's quite a coincidence the same thing is happening with yet another "overclockable (results may vary)" monitor.
Due to all the flaming, and Mikey flaming the person who created this thread (Metros), I kept my mouth shut this entire time.
But I think I need to say something.
First, the scanlines that you people see are there even with Gsync *disabled*. it's just VERY VERY faint, but it's there if you train yourself to look carefully for the very slight luminance variance at the same pattern. That faint pattern isn't noticeable under normal use but it *IS* there.
They just increase when gsync is enabled.
This pattern is not something new. We've been discussing this type of artifact for years. And it is precisely this type of artifact that has limited monitor refresh rates to 120-144hz for the last God knows how many years.
The original Lightboost TN panels (both 120 and 144hz variants) would show this type of artifact when Lightboost mode was enabled. Some samples would show it even with Lightboost disabled, at 120 or 144hz. If it was distracting at 144hz then it was worth an RMA.
I've seen those exact scanlines on my XL2720Z when I use a Vertical Total VT 1500 tweak for blur reduction (crosstalk reduction) And sure enough they are mostly on the left and top area of the screen.
And as others have said, the same artifacts appear on some Qinx monitors when trying to overclock them to 120hz.
And on monitors with factory unlocked refresh rates (like those Korean qinx 24" units that use the same panel as the asus VG248QE, the same scanlines appear when you overclock them past 180 hz.
If Acer is only warranting the panels to 60hz refresh rate and the scanlines appear if you don't overclock, then I don't see any reason to complain. But they should not be appearing in gsync mode at all.
However please keep in mind that the entire reason they appear in gsync mode is the exact same reason you get them in Lightboost mode.--panels being pushed beyond normal voltage and timing specifications. That's basically all I'm trying to say.