. . "ough the system, as in from device to device...eg. from HDD to Memory to CPU to memory, temp storage (disk), memory to CPU to memory (this can loop through till the data set has been completed) then it goes off to your rendering (CPU) and saving (back to disk).As you know the CPU is the fastest device in your machine, pumping at the highest frequency, followed by your memory and then its the disks" . .