There is the option to buy a new PC Desktop, about the memory ram, there are these two options
Memory Kingston Fury Beast, 16GB, DDR4, 3200 MHz, PC4-25600, CL16, 1.35V.
Memory Kingston Fury Beast, 16GB, DDR4, 2666 MHz, PC4-21300, CL16, 1.2V.
At a first glance the first seems better...