I bought a 3060 12 gb and a 650 watt PSU. I hooked everything up and everything ran awesome. I also run 2 sticks of 8 GB ram and a i7 Intel CPU. I turned off the PC and unplugged the power cable but did not turn off the PSU and did not unlug peripherals or Ethernet (horrible mistake). I did this to add a new seta cable to use 2, 1 for each hard drive. When I turned the r PC back on, it would turn on and off again over and over. Fans would spin and then stop. I did some messing around with the cables, and got it to turn on with white shirt cpu flash and long ram flash. After trial and error, I eventually switched the ram to the other ram slots as j was reading long ram light might mean faulty ram or ram slots. I swapped the ram to the open slots, and my pc restarted itself after 10 seconds. Then there was a long VGA white light which faded to nothing. The PC also took a bit holding down the power button to turn it off. Now it turns off instantly. I'm scared. What do I do? Did I actually ruin computer?