OK. I am going to show you how to see every resolution that Windows thinks your monitor can handle and if 1920x1080@32bit color@60Hz is there, you will be able to change that monitor to that.
Right click on the desktop and select Screen Resolution from the popup menu.
On the next screen, you will see a graphical representation of your two displays. Make sure the one that is listed in the drop down box is the Samsung. If it is not, select the Samsung either by clicking on monitor 1 or 2 (which ever it is), or using the Display dropdown box to choose it.
Once the Samsung is selected, over in the lower right corner click on Advanced Settings.
On the panel that appears, click on the Show All Modes button.
You will now need to find the entry that says: 1920 by 1080, True Color (32 bit), 60 Hertz.. If that is there click on it to select it (it will turn blue), then click OK, Apply, OK and OK. Your Samsung will then be at 1920x1080.
Let me know what happens.