Cant connect to 2 monitors over DisplayPort

Aspen Seiver

Honorable
Dec 1, 2013
8
0
10,510
I have a GTX 1080TI (Driver 388.59), R7 1800X, 32GB of ram, all in an Asus Crosshair vi Hero. One monitor is a 4k monitor and the other is a 144hz monitor, I will be referring to them as such.

I've been running two monitors for quite a long time now, and just this morning the display drivers crashed as I was loading PUBG test servers. After the crash my 144hz monitor wouldn't get a signal but my 4k monitor worked fine. I figured just restart and it'd be fine, still nothing. I figured I'd test the monitor so I plugged it in through HDMI from the same computer and the monitor works fine. I swapped the DP outputs on my PC and still didn't get anything. Then I swapped the DPs and same thing. At this point I figured out that if I only had the 144hz plugged in it worked fine and if I plugged both in only the 4k worked. So then since it was right after the drivers crashed I figured I'd reinstall the drivers, still nothing. So then I downloaded the latest drivers and did a clean install... Still nothing!

I guess I could just plug the 4k in through HDMI for now, but I'd like both DPs to work again. Any idea why it'd be doing this? I know it's not the cables, the monitors, or the card so it's got to be something driver related.

Here's what the Display settings look like with both monitors connected: https://imgur.com/a/bLhB6
 

Aspen Seiver

Honorable
Dec 1, 2013
8
0
10,510


Just tried it. Still not working with both on DPs but with one on HDMI and one on DP it works just like before. It's so weird, I don't understand why it's doing this.