koenraad Am I absolutely certain? No. But PSU's should never make a "click" sound. I've purchased about 6 power supplies in the past five years, and have never personally experienced that. The power supply is the most likely cause, but no, there are no certainties here.
By the way, I'm familiar with several of your components as I own the Asrock B450 Pro4 / Ryzen 5 2600 / and Corsair Vengeance LPX albeit 2400 Mhz RAM, in one of my builds.
By the way, when you say that you're jump starting the power supply with a paperclip, what do you mean exactly? Regardless, were it me, I would order a new power supply and start the RMA process on the current one, and keep it's replacement as a spare. One last thing: I do not skimp on power supplies ever. I do not exaggerate when I say that I consider it the most important component of my build. If your issue is indeed caused by your power supply, then feel fortunate that it didn't damage any of the other components connected to it. A lesser unit certainly could do so.
The future Nvidia 30 series 3080 Ti are rumored to have a 320 watt TDP. If I were to believe this figure, and were in your position, I would order a power supply with at least 650 (but no more 750) watts. And ideally it would come with a 7 - 12 year warranty, be modular and have gold efficiency, although bronze is acceptable; gold units usually have longer warranties though. All my power supplies have no less than 10 year warranties, which means that they'll last through two PC build cycles. If you divide the purchase price of a power supply over ten years, it starts to look liked more of a bargain. Personally I've always like the EVGA G2/P2/T2 units, but they are hard to come by right now. I think EVGA deal with Super Flower, the OEM manufacturer of these particular models, has come to an end. Moving forward, I'm probably going to purchase Seasonic's Prime (or Focus) GX / PX / TX lines of power supplies. The Focus is a small step below the prime, although still excellent. The GX is the gold efficiency unit, therefor the Seasonic Focus GX 650 would likely be the best value for your money, assuming that you can find one:
http://www.jonnyguru.com/forums/showthread.php?16809-Seasonic-Line-Up-and-OneSeasonic-Initiative
FYI: The EVGA T2 power supply in my signature is 1,000 watts, only because I used to run two 980 Ti's in SLI. For my single GPU, it's massive overkill and completely unnecessary. I also got the PSU on a one day sale for "only" $140 USD, otherwise I wouldn't have bothered with that particular unit.