With that much RAM and a 64bit system Poser 2012 is the way to go if you can afford it. It would be a real shame to have all that RAM and have Poser restricted to using less than a quarter.  Even if you are not doing complex scenes right now who knows what you will be doing a few months down the line.  

I have been using Poser 2012 since it was first released I most of my final renders easily exceed 4Gig of memory with 12-16Gig being fairly common.

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.