I am curios how you found out that a DOA 5800X runs 25c hotter.
It did work when it didn't WHEA Crash after an hour or so, it got to a good 70-75C during gaming, while my 11700 only reaches 50-55C.
Anyways, the motherboard was an Asus Rog Strix B550-E Gaming (piece of shit as well), tried various BIOS versions at the time, but it kept WHEAing. Also bought different memory as the HyperX Fury kit threw memtest errors all over the place, so i bought a G.Skill 3200 MHz kit instead. But even at non-XMP settings the system would WHEA crash.
The WHEA crashes said "cache hierarchy error" all the time. People told me that's simply a bad CPU, so i send everything back to the store and they refunded everything.
This was back in January this year. So i thought everything over until last week, do i want to try AMD again? Or go with what i'm familiar with? So i ended up getting a 11700 to upgrade my 4770K and i havn't regretted it.
During my thought process i also figured out i don't need the best of the best anymore to play games.