Asus Swift PG279Q Black Screen / Dropped Signal

jbrodigan907

Honorable
Feb 17, 2012
15
0
10,510
My setup:

Asus Z170 Pro Gaming Rev 1.04 LGA1151 (BIOS updated to most recent)
i7-6700
64GB DDR4 3200
Samsung 850 EVO
2x Gigabyte 1080 GTX (SLI)
Pri Mon: Asus Swift PG279Q (DP)
Sec Mon: Acer S241HL (DVI)
Corsair 850W PSU

My problem is that any time I increase the refresh rate above 60Hz, to 120, 144 or 165, the screen will go in and out showing nothing but black or stating signal lost. I've searched up and down the interwebs and everyone's "flickering" that I see in videos is nowhere near as dramatic as mine, as my screen goes entirely black and can go for 2-10 sec. I've tried every solution other ppl mentioned that worked for them, Gsync on/off, singular monitor, turning SLI off, updating BIOS, verifying video cards are in proper placement, modifying individual application settings to use fixed refresh and gsync off. Nothing but turning it to 60Hz works and even then on rare occasion it does it. I had the guy demo the monitor at the store and it worked seamlessly on their display computer that was as close to my setup as possible. Any ideas gents? If you need additional info, ask away.
 
Solution
I used the one in the box. Initial I used the DP cable from my old monitor and would get black screens/no signal at higher refresh rates. I switched to the cable in the box and never had an issue again.


Doing the same thing, high frequency screen blackouts. The higher the frequency, the more often the blackout.
 


I'm assuming you've completely removed and reinstalled your display drivers as well?
 


Yes, and oddly enough through the process, both monitors would stop receiving signal and require me to reboot after the driver/software was uninstalled as well as reinstalled.
 


That is pretty strange. I don't know what else to tell you really other than to spitball. Have you tried pulling the 1080 you're connected to out of the system, moving the other to PCI slot 1 and connecting to that? Have you also tried resetting the monitor from the OSD?


 


Odd, wasn't letting me edit or complete my last post... I haven't done that with the video cards just because the secondary monitor works perfectly and did so with a different monitor with the original GPU by itself prior to me getting the 2nd and bridging them. I've reset the monitor, updated the drivers with the MFG drivers on their website and tried different DP ports. The only thing that I've seen that made me scratch my head about a possibility is my CPU only supports up to 60Hz... but I assume that would only affect the integrated graphics? Correct me if I'm wrong.
 
So I got up this morning, came in and played around a little... changed the Hz from 60 to 120, and everything seemed fine. Opened Overwatch, started playing a little... slowly but surely, the flickering returned and became more and more frequent. This kind of makes me think it might be a heating issue? Which is a little puzzling as every temp my computer monitors says all the components are well below their warning temps. I removed the side of my case and blew a fan straight into just to test the theory for a bit. Things did seem to stabilize a little but occasionally there would still be flickering. I believe heat may be playing a role but I don't believe it's the root of the problem.
 


I haven't yet, that is on my list of things to do. As I did purchase a higher quality cable rather than using the included one with the monitor, I thought of it as less likely the cause. Could you let me know the brand/specs of the one that ended up working for you?
 
I used the one in the box. Initial I used the DP cable from my old monitor and would get black screens/no signal at higher refresh rates. I switched to the cable in the box and never had an issue again.
 
Solution


Went and found a different cable that supported 21Gb/s and it's working beautifully up to 120Hz so far, I'll test it further later on but 0 screen blackouts since swapping the cables.