I have an Acer XB240H and a GTX980 connected by DP, in 1080p and running at 144hz, which ran with no problems up until an hour ago. I reached behind my PC to change my audio cables and I assume I nudged the DP cable, which turned my monitor off.
After faffing about for a bit to get it back on, it's now for some reason locked itself to 85hz. I've unplugged it, tried different ports, reinstalled my Nvidia drivers, messed about with the OSD for the monitor itself, rebooted a bunch of times, and changed just about every setting in the Nvidia control panel. The only options I could get up to this point were 60hz and 85hz.
I then tried creating a custom resolution in the Nvidia Control Panel, at 144hz. Doing this for some reason unlocked the options for 60, 85, 100 and 120hz, and seemed to be running fine at 120. I tried again to create a custom resolution at 144hz and this blanked my monitor out and took a few reboots to get it on again.
I have no idea where to go from here; the monitor is plugged into exactly the same port and is definitely displayport so I have no idea why it's forgotten about 144hz.
After faffing about for a bit to get it back on, it's now for some reason locked itself to 85hz. I've unplugged it, tried different ports, reinstalled my Nvidia drivers, messed about with the OSD for the monitor itself, rebooted a bunch of times, and changed just about every setting in the Nvidia control panel. The only options I could get up to this point were 60hz and 85hz.
I then tried creating a custom resolution in the Nvidia Control Panel, at 144hz. Doing this for some reason unlocked the options for 60, 85, 100 and 120hz, and seemed to be running fine at 120. I tried again to create a custom resolution at 144hz and this blanked my monitor out and took a few reboots to get it on again.
I have no idea where to go from here; the monitor is plugged into exactly the same port and is definitely displayport so I have no idea why it's forgotten about 144hz.