my pc is fast but its work slow on C4D

[Marwan Benomar]

hi all,

i have fast pc and this is my specs:

processor: intel i7 6850k
number of cores: 6
number of Threads: 12
Processor Base Frequency 3.60GHz
Max Turbo Frequency: 3.80GHz
with 15MB cache

memory: 64GB DDR4

GPU: GeForce® GTX 1080 G1 Gaming 8G

when i start working with realflow my pc get slow alnd lagging and even freezing sometimes. is there is someway to fix this or my specs not enough for realflow?