A:AnswerMy Corsair PSU had 2x 8-pin cables labelled "CPU". You can twist the 8-pin cable to disconnect it into 2x 4-Pins.
This is a Corsair 850W modular power supply, so your results may vary.
-J
A:AnswerI'd go to tech support for somthing like that, it's probably your drivers firing off in the wrong order or your OS not properly installed. I'm no expert but it definitely sounds like a software thing
A:AnswerMake sure everything's plugged correctly. Make sure RAM is seated correctly ie. take it out then put it back. You haven't really provided enough info for anyone to be of much help other than that.
A:AnswerIf it's the case you're worried about, then yes, the board will fit. The graphic card will work as well. As for the processor, if it's a LGA 1200 socket, you'll be fine. 32gb of ram wont be an issue either.
A:AnswerYou can find the memory QVL. Please verify that your desired kit is on the QVL prior to purchase. https://rog.asus.com/us/motherboards/rog-strix/rog-strix-z490-e-gaming-model/helpdesk_qvl_memory/