You will most likely be able to put a thick 120mm AIO radiator on the back 120mm exhaust and if you have 140mm mounting holes on the top 200mm fan grill, then you should be able to get a 25-30mm thick 120 or 140mm radiator installed there. Just make sure that you have enough clearance between the radiator with a fan on it and your ram and the top of your motherboard or any heatsinks that may be there.