I have to agree with replaciing the PSU. I bought a new prebuilt computer from newegg last month, and after barely 2 weeks the PSU blew out. So now im waiting to get my 850$ brick repaired and returned to me.
There is no need to worry. The difference between buying a prebuilt and a self built is the warranty. Prebuilts have a warranty on the whole system. So easier to get your system up and running again in case the psu do take out other components with it.
This is true, however buying from cyberpower means you pretty much have no warranty as its almost impossible to get in contact with support. Tried a few years back and was put on hold for 20 minutes on several occasions only to be hung up on. Took me about a week to get someone on the phone. Then it took me about a month to get my laptop back from them. Then had the same issue again and it took them even longer to get it back to me. By then my warranty expired so the 3rd time I had a problem they wouldn't do anything. I ended up having to repair it myself.