Try adding a custom resolution of 320x200 with your display driver. Worked on my nVidia card.
2014-03-30
nVidia's control panel has a button to add custom resolutions in the resolution selection tab.
2014-04-01
you are logged in as Doge
2014-05-23
Hardware C2P through its Akiko chip!... no :)
2014-05-25
I used to be chunky, but now I'm planar
The onewhiner
2014-05-26
I would really recommend using the Windows 8 SDK for D3D11 code, so you get all the latest goodies. Remove the legacy D3DX-junk from your code, and make it run on WinRT and Windows Phone as well.