I am using a Samsung LED TV (native resolution 1920x1080), as my computer monitor connected through HDMI. The OS resolution is set at 1920x1080 and the NVIDIA driver reports the same. The computer is a desktop with the NVidia GTX 680 graphics card and only has this one screen connected to it.
However, some programs including Steam and some games seem to think the resolution is lower.
Plus recently, I was writing a graphing tool and was surprised to see that the resolution is being reported as 1536x864 when I try to access it programatically!
The above resolution also seems to be what Steam assumes and does not maximize beyond that point.
Please note that this behavior was the same when I had Windows 7 on the same configuration. Have now installed 8.
Samsung has not been helpful. Any ideas?