On the second S2721DGF, in the Windows Display settings and the Nvidia Control Panel, are you able to see Hz options 2560x1440 120Hz and 144Hz? If yes, then G-Sync is turned on for it. If you only see 60Hz, then no G-Sync.
Having owned a Dell S2721DGFA monitor for several months and being very satisfied with it, I decided to buy another one since I need a second monitor. However, since I have only one DisplayPort output on my graphics card, I connected the new monitor through HDMI and now when I visit Nvidia Control Panel, I see this: [IMAGE]   The display shown on the left is my older S2721DGF, connected via DP. Does the info shown in the image above mean that G-Sync isn't enabled over HDMI, or that it doesn't work with two monitors? Or it actually works but the above screen doesn't explain that because it doesn't say "G-Sync Compatible" on HDMI-connected monitor?
S2721DGF, G-Sync over HDMI?