Dell optiplex 790 case change

I have recently purchase myself a dell optiplex 790 sff i bough it with 16 gb ram i5-2500 core processor and 1tb hdd but the problem is i want to transform it into a gaming pc but theres not enough room for a new power supply and gpu my question is can I get a case cool looking or not that will take the parts and motherboard of a Dell Optiplex 790 small form factor?