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ASUS ROG Strix XG27UQ black screen @ 144hz

Level 7
I have an ASUS ROG Strix XG27UQ connected to an Asus GeForce RTX 2070 ROG STRIX OC 8GB Graphics Card by a 4m long VESA Certified Club3D CAC-1069 DisplayPort 1.4/HBR3 Cable DP 1.4 8K 60Hz, 24AWG cable. Drivers up to date in GEForce Experience. Updated GPU driver in Device Manager (Uninstalled & Reinstalled).

Previously, with a LINDY 36304 DisplayPort 1.4 Cable Cromo Line 5m it used to "black screen" quite regularly. Lindy tell me that's because, at that length, the cable is actually a 1.2, not 1.4. So, switched to the VESA cable (better cable, 1m shorter and 1.4 certified) and now it only does it when set to 144hz and switching from playing the new Control Foundation DLC in DLSS 2.0 (2560x1440) to the Windows Desktop (in 4K). Doesn't do it when playing, or on the desktop - just as you switch for a couple of secs. Doesn't crash. DLSS doesn't allow above 1440, for me anyway.

Drop the Refresh to 120hz and it's fine. Does this indicate that the DSC isn't functioning (which should lift a DP 1.4 max refresh up to the 144hz mark) or is it indicative that, despite the VESA Certification, 4m is just too long for DP1.4? (Physically, the pc is that length from the screen... don't ask!)

NVidea Control Panel shows 3840x2160 (native) @ 120Hz (works) or 144Hz (black screens). Is there somewhere to turn on DSC? G-Sync (Compatible) enabled for Windowed & Full Screen. All this config done with no other monitor connected.

W10-64 up to date. Asus Prime Z390-A (latest bios), i9-9900K, Corsair RM750x, Corsair Vengeance LPX 32GB, M.2 970 Evo.

I bet I missed the one bit of info you need....?


I have a problem that you on my Asus XG27UQR, I have a random black screen of a few seconds, when I activate the 144hz, 10 bit, RGB full range. I think our displays that use DSC, Nvidia handles the stream poorly, and it's not perfected yet.

Level 7

I made this account just to post this since i have this problem and couldn't find a solution... until now.

Its a overheating problem. After trying everything under the sun i decided to check if its heat. Took out the plastic cover for the cables in the back of the monitor and i put a desk fan to blow air on the ports. 

Needless to say i haven't gotten a single black screen since. The moment i stop using the fan, in a hour or so i start getting the random black screen. 

I hope this helps.