Question FPS drops when running 4k 32" monitor as a second display

[Relann]

I have frame rate drops when running a 4K monitor as my second display when raiding in World of Warcraft. Disabling the second display seemed to stabilize the FPS.

I would like to keep the config without having to disable the second display. Is the best path a second video card? I tried lowering the fixed framerate of the second monitor as well as lowering the main monitor from 144 to 60. Both are connected over display port and Gsync is enabled on both.

Primary Display:
ASUS ROG Swift PG279QZ 27" WQHD 1440P IPS GSync

Secondary Monitor
Acer Predator XB321HK bmiphz 32-inch IPS UHD (3840 x 2160) NVIDIA G-Sync

GPU
NVIDIA Geforce GTX 1080 TI

CPU: I7-8700K CPU @ 3.7
Memory: 16Gb
Win10 Pro

I just want to run discord, Edge, and Spotify on the second monitor.

Thanks!

 

[XD I know pc's]

the best answer is yea a second gpu is going to help out much more cuz ur current gpu cant handle a 4k monitor and ur original display at once thats just insane and hard for ur 1080ti to do so i think ur gonna need another or drop ur game stttings down a bit to get more fps while maintaining the 2 monitors

 

[hang-the-9]

Best setup for dual monitors in gaming is same resolution and same refresh rate on both monitors, or there will often be issues.
It may help if you run in Windowed mode not full screen Windowed.

I have a much slower video card, Radeon 290X and I can run WOW at past medium settings at 4k at 60fps in most areas, maybe 30-40 during dungeons and raids with lots of stuff flying around. A 1080 card can handle 4k and a second monitor.