If you really want to unlock the 10900k, you have to pick a $450+ MB.
I'm MAD because there is NOTHING that should have kept me from running a i7-6700k -> i9-10900k in a z390! The new top z490's are rebranded z390's. Instead of releasing a new socket with their new CPU, Intel should have back ported it to run all 1151 CPU's. That would have completely cleared out their MB's and CPU's. Remember Intel released 2 CPU's and then made the next 2 incompatible with the the older 1151 socket :-(
I have a Asus CHVI-E x370 MB that will run a lowly first gen (2017) Ryzen 1 2c/4t to latest (2020) Ryzen 3 16c/32t CPU. This is all off the AM4 socket.
Where is Intel's superiority? It's the same tech ~ that was used in the i7-6700k/z170 to the i9-9900k/z390 (Socket 1151) (14++++). Other than Greed, there's no need for a new Socket nor a new $500 CPU.
IIRC Intel's new 10nm or 7nm??, will require a new chipset anyways z590 anyone?.
Thank You For Your Time
In Reading My Post