How to install a GPU outside a case?

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Nov 23, 2015
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My cousin bought a SSF desktop and he wanted to put a 750 ti in there, as there is enough space in length. http://i.imgur.com/xhaVaaJ.png

However, the case's height is under 4in, while a 750ti is about 4.5in high.. http://i.imgur.com/VFTFlJb.png

So I know a GPU can be outside a case, with the fan up and all, but I was wondering what he would need for that.
And could he just not put the side panel at all instead?