Ryzen are cooler than Intel processors on average anyway, so this AiO would be sufficient. If the space is available, however, I would personally always advise larger radiators.
Sure, a larger radiator fits in there (according to the specifications, up to 360mm), but for a case like this I'd rather go for the ML240L RGB, which is definitely worth the 16 franc surcharge for the 240 instead of the 120 radiator.
Entweder mit einem eingebauten Controller (http://us.coolermaster.com/uploadfile/fileproduct_list/en17111500017f04/PRDPIC/13_252eef0abbbaf2477f495cf737bc477b_1510710626.jpg) oder mit RGB Software wie: ASUS Aura, Gigabyte Fusion, MSI Mystic Light Sync, AsRock RGB LED.