I have a 13900K. The default BIOS settings set a maximum wattage of 4096W (!!!) that makes Prime95 fail. If I change the settings back to 253W, what Intel says is the maximum wattage, Prime95 stops failing.
Still, I don't know if I should RMA. I got the K version because I intended to overclock in the future. And all of this sounds like I won't be able to. I think increasing the voltage a little bit makes the system more stable. I have to play with it. (Really, if someone can say whether I should RMA or not, I would appreciate some input)
Edit: decided to RMA. I have no patience for a CPU that cost me +600€
Still, I don't know if I should RMA. I got the K version because I intended to overclock in the future. And all of this sounds like I won't be able to. I think increasing the voltage a little bit makes the system more stable. I have to play with it. (Really, if someone can say whether I should RMA or not, I would appreciate some input)
Edit: decided to RMA. I have no patience for a CPU that cost me +600€