Make "physical screen size" same as "virtual size"

[makotorii027]

The screen size of the VN I am creating is 1280x720. However, whenever I test it out, the screen size appears larger than it should be. I realize that the "Graphics Acceleration" has an influence on how big it will really appear on the screen. (Been seeing something about "physical screen size" and "virtual screen size", but I'm not that knowledgeable.) Using auto select or Angle/DirectX or OpenGL will make it look bigger while Software will make it actually look 1280x720.

So what I'm wondering about is how do I make the screen size scale to 1280x720? (Regardless of my screen's resolution, if it's a factor.) Using Software renderer seems to cause strong slow downs, so I'd rather not do that.

How the screen size is in any renderer aside from Software.
http://i.imgur.com/2EtrzxC.png

The screen size in Software:
http://i.imgur.com/KpI9Xdu.png