Need help to configs precision t7820 with intel optane Pmem 100

I’m working with a Dell Precision T7820 running a single Xeon Gold 5217, and I’m trying to use a 128 GB Optane PMem module together with five 8 GB DDR4 RDIMMs. The BIOS detects all six modules, but it only reports 40 GB of installed memory. Windows shows the full 168 GB installed, but only 40 GB is usable. I’m already on the latest BIOS, and there are no options available to configure Optane or Memory Mode. I also attempted to configure the module using ipmctl, but the goal will not stitch after reboot.

Any help or insight would be greatly appreciated.