Well thank you for going more indepth here. Unfortunately this is a question that doesnt have a yes or no answer. I know many other factors go into the result, but based on the two processors mentioned, and the systems being identical in ram, motherboard, hard drives, and every other component other than cpu and video card, could anyone make an informned decision with the knowledge at hand.? I do not have the ability to test these systems side by side. Real flow claimes multi threading support on most of the features, hybrido solver - rigid bodies - meshing and others... Now i know some useres would say, " why wuold you even wanna sim on a laptop..?!" well again, this is not for my work horse... just to test things while not available to use a big workstation. the 24core 48gig ram workstation i used at the studio is MUCH more suited for siming..! but i am not always at my desk and when im writing some mel or python that is code for affecting or modifying particles, or fluids and i wanna test it small scale, i want a laptop that will get the most power out of whatever processor it has. and considering the large difference in clock speed between the i5 and i7, nearly 1ghz, i'd like to know if those multi threads are going to even be much of a performance boost. obviously they dont operated at 100 percent, and probably drop alot in efficiency as more engage, so again, Is a faster core clock, or more cores/threads gonna be a better option.