supernova

I ordered an EVGA Supernova G5 850W and it came with a North American C13 cable. Is it as simple as just buying a new C13 with a UK plug on the end and using that instead? AC input on the PSU label is 100-240V, 60/50Hz so that makes universal right? I feel like I'm being really stupid, but...

https://www.youtube.com/watch?v=43VDRUa_YPc As you can see from the video when I open up discord it is causing my psu to make this strange clicking sound. The pc is only a week old, and I want to know if this is worth sending back for repair, as this is the last thing I was expecting to happen...