It's up to you. If you want inside of your case to be a bit more tidy, buy modular one. If you don't care about sticking all cables (tons of them Image may be NSFW.
Clik here to view.
) inside your case, then fixed one.
To shed some light on the differences:
https://www.yo...
Clik here to view.

To shed some light on the differences:
https://www.yo...