Help getting 1080p

I'd use Solution 1, first of all you get much better quality with DVI than VGA as VGA is analogue (and so I have found with my 1080p monitor, had flickering with VGA).
I'm not attune to the nVIDIA control panel, but sometimes resolutions are locked due to you having a specific refresh rate, try changing this, it's normally 60Hz.

Then, your monitor should have a setting called Overscan, try adjusting this if the desktop doesn't fill the screen (i.e. there's a black box around it).
Hope some of that is some use!
 
Could I ask how your monitor is connected to your graphics card? You said DVI, but what type of connection? Is it dual link DVI-I on your graphics card and dual link DVI-D on your monitor like mine, and do you use any adapters?

I did use DVI-I to a DVI-D yes, and it worked perfectly, I'm now using a full HDMI connection though, because my monitor and card supports that.
It is highly likely that your VGA connection is the problem as you can not scale your resolution with an analogue connection, only with digital (DVI or HDMI).

A VGA to DVI adaptor would not work, you would need a full DVI cable.
 
You wouldn't need a dual link DVI cable by the way; that offers extra bandwidth for 120Hz @ 1080p (and is why your graphics card would support such a cable), but for general monitor Hz ranges both HDMI and a common DVI cable would be fine up through 1080p. Only time I needed DVI to HDMI is for hooking up to something like a TV that only had HDMI or VGA as options.
 
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