fan direction

It comes down to this: does the direction of air flow through the radiator make much or any difference The rest is just more detailed. I am stumped and was hoping for some feedback. Building my second build. I have a Corsair Crystal 570X case w a Corsair H100i Platinum RGB radiator system. I...

THis new laptop only comes with 4gb of memory and 50% of it is used by the system on startup even after turning off everything except BitDefender security software. Am adding 4gb to max it out but wonder what else I can do to speed it up?