Machine with more that 128Gb Memory ?

Hello,

I have following issue, when calculating depth maps 98% RAM used. 

Also when check GPU - CUDA process it is jumping from 20% to 90%, not stable as CPU calculation that runs on 100%.

project (4105pics, 9.997.872 ponit count)

 

Mb X570,R9 3900, 2080ti, RAM 64bg