When I have anything open on my second monitor whether it be hardware-accelerated or not, I get a massive smoothness loss. This includes a text document, discord, youtube, and any other programs. (With HWA on/off too)
W10 Home 64bit
RM850x power supply (Plugged into a fairly new UPS but this makes no difference in the problem), GTX 1060 6gb Gigabyte G1 gaming*, 8700k, 16gb 2x8 DDR4 Corsair Vengeance 3200mhz, Asus z370 strix - f gaming, AIO watercooler no temp issues there, 2x 250gb 960 evo NVME SSDs, 2x patriot garbo 240GB in raid 0, 3tb Toshiba HDD for my plex.
Latest bios for this board as per their in-bios updater.
Monitors include an Asus pg279Qz (using G-sync and a dell WFP 2407 (maybe 2408 either way it's a garbo 1920x1200) Dell is HDMI and Asus is DisplayPort
A little larger and more in depth description of the issue:
When I'm playing games, borderless windowed mode (No change with fullscreen), and I have any movement or program open on the secondary 60hz and 1920x1200 monitor I have no visible drop in framerate, but a massive drop in the actual smoothness of what I am seeing.
Now, for what I know about this issue:
G-Sync turns off on the main monitor when non-G-Sync monitors have stuff playing on them. This problem occurs when G-Sync is on, but also when G-Sync is off.
This problem has plagued me for years even when I was using a non-G-Sync 144hz 1080p monitor (That now my fiance uses so I can't use it as a secondary).
This problem has occured over the course of 2 fully difference builds with the only items transferred between them being this GPU and the 1920x1200 monitor.
It has persisted through win-7 and win-10.
I've got this kind of pinned down to a few possibilities:
Scaling issues with anything running on the 16:10 monitor not being synchronous with my 16:9 main display
My GPU may just be kind of borked
Possible windows issue that is just a fact of life with how the OS works
Not having a 144hz+ secondary to match framerates with my main display thus throwing off some sort of frame rendering pattern?
Finally to describe the smoothness change. It's just flat out like dropped frames, it's not a performance drop, there's no drop in actual recorded and benchmarked framerates. It straight up feels like it has turned to 60hz when anything is on my second monitor.
EDIT: Graphics card model added. "*"