The traces are wired to CPU pins, there is no potential BIOS update to make it 8 channels from CPU pins for only 4 channels. You need different socket with doub

The traces are wired to CPU pins, there is no potential BIOS update to make it 8 channels from CPU pins for only 4 channels. You need different socket with double the number of pins for memory to double the number of channels. Your 4 channels with 2 slots each have the 4 channels daisy chained to 2 slots, but they are just 4 channels. With 8 channels and 2 slots per channel you can have 16 slots, with 32 GB unbuffered (regular) DIMMs you are limited to 512 GB of RAM, for 2 TB you need registered or load reduced RAM.