I started having this problem today. I've had this monitor since June with zero issues, both SDR and HDR function was superb -- until today I've been on a 1080 ti. Today I installed a 2080 ti, and it functions wonderfully -- for several hours I benchmarked a lot of games just testing it out. Then I closed out (iirc) The Evil Within 2, and I suddenly have significant "Variable Backlight" issues in SDR or HDR.
Huge black blotches across the screen, and banding especially with contrast changes. Whatever this is, it is completely unacceptable - and I hope it's a driver bug, otherwise this $2,000 monitor is now broken.
I recorded a video trying to demonstrate the problem:
(Currently: EVGA 2080 ti XC Ultra @ 411.70 driver)
Is this what you have xiejiaxuan008 ?? If so, I can assure you it is NOT normal. What video card and driver are you currently using?
I was so excited when I received this monitor today but I immediately found a problem of my monitor. (all settings are default, 98Hz, 10bit, 1080Ti, DP port)
No matter HDR is turned on or off, there're some grey bars (banding?) when pure white image displayed.
It's annoying especially pure white scenarios like google search pages.
(photo taken from iphone, running DisplayHDR Test)
I found the only way to remove them is to turn Variable Backlight off under SDR mode.
I'm completely satisfied it's HDR performance and I understand this monitor uses local dimming zones/arrays.
But I don't know these obvious grey bars:
1. Is just the limitation of local dimming, or
2. The monitor I received has some problems
I had several pg27uq due to RMA cases and all of em had these bars but 2 of em was worse than the others..You could try and file a RMA but
if you do that then you get a refurbished monitor aka "a frankenstein" monitor in return, and it can have other other or worse problems..you have been warned.
I am in a nightmare of RMA cases atm