Ansys Employee
Hello @ fparveen As You mentioned, you are using two different machines, Could you please tell us the processors and other hardware configurations were the same for both machines?
HFSS uses adaptive meshing.
If you are simulation the same model you should get the same results irrespective of the RAM and CPU. It seems switching to mixed Precision is due to your laptop have NVIDIA graphics card.

Using less memory does not mean the end result is less accurate, if the solution is converged completely that means results are accurate.