All words of wisdom thank you for reiterating them! I may be crazy but I don't think the Display Port cable is the same on my VG259QM as it is on my PG259QN but don't hold me to that! I'd need to check. I used the PG259QN out of the box and did not it seemed pretty thick than others but new monitor, all excited, trying to figure out how to get the dang stand off (Japanese instructions online showed before they updated and it wasn't in the manual included). It's 1.4 though a small revision was made for 1.4A in 2018. Struggling finding a 1.4A.axaro1 wrote: ↑05 Oct 2020, 06:44The cable coming with the VG259QM was kinda cheap, when I was using a DP 1.4 certified cable my monitor was displaying the 2 different DP modes (whether 1.2+HDR or 1.1), now that I'm back to the original cable (since I ended up breaking the 1.4) it doesn't even make me click on the "Displayport Ver." setting.Glado wrote: ↑04 Oct 2020, 19:31Alright so I had a bit of a breakthrough. I tried getting the new DisplayPort cable to work because I thought it was bizarre that it was not even turning on. I find that the lip they have at the bottom of the monitor makes it extremely difficult to plug in the cables sometimes. I’m going to sound like an idiot, but the cable was only partially plugged in. When I pushed the DisplayPort cable until I thought it was going to break , the cable finally fully went in the monitor popped to life.
After this I went into game and tested those same mechanics I described before. To my surprise using this new cable things were working flawlessly. I finally have that same super responsive feeling I had with the vg259qm again. I would say I wasn’t just able to do the mechanics but a lot of them felt easier than they have ever felt before.
This leads me to believe that the DisplayPort cable that ASUS provided me had an issue and was causing the lag problems I was seeing before? I am very glad I decided I was going to give the monitor one more shot with the new display cable because the difference between what I saw before and what I see now is literally night and day.
As a general rule when purchasing DP I generally aim for +1/2 generations newer DP cables compared to the monitor standard (For example 1.3 or 1.4 for 1.2/1.2a ports) and most importantly I double check on https://www.displayport.org/product-cat ... -adaptors/ to make sure that it's actually VeSa certified
Another very important thing to keep in mind is to buy a short DP cable, preferably 1.8m or less. If it's 4-5m long there's high chance that you won't be able to reach enough bandwith, there are multiple reports of people struggling to run 1440p 144hz on 4/5m long DP cables which were solved by buying shorter cables (or eventually messing with PreEmphasis and Voltage swing, PreEmphasis to create micro packet overshoot to balance signal attenuation, Voltage Swing to overvolt the Displayport link, but these are just workaround to the cable length issue).
In some cases even flickering can be solved by using a VeSa certified cable.
Monitor producers have no interest in spending money to get the VeSa certifications.
Also, does anyone have a list of things to try to get into service menu? No luck using VG259QM method. No idea if Asus is pretty standard with this or not.