Liquid cooling fan

[dragonwhisper]

I am building a liquid system for my corsair 650D case and I was wondering what size fan I can have on the back. any thoughts?

 

[MrTechguy247]

closed loop or open loop?

 

[manofchalk]

Umm... More info?

On the most basic level, the rear fan mount can hold a 120mm rad.
Though if you cant ascertain that for yourself, and this is basic research skills and common knowledge, you should not be building a custom water-loop.