you need to have enough ram and very very good software......!
if the software that you are using is wasting resources.....
no big computer on earth can run cool enough.......
also after some time your puter is collecting junk and slowing down...
a simple off the shelf no big deal unit can work well if you keep
it clean and avoid devoting to much workload for running trash....
keep the memory on the harddisc low..
Last month I thought I had a virus....computer ended off shutting down
I thought it was broken.... nope ..the harddisc was full up to the lid and I
foregot to transfer to external harddrives....
When you are working on 3d... a good idea is to
keep poly count low and faking detail with bump maps..
also keep an eye on the settings of your render engine...
you can waste a lot of grunt of your puter with wrong
settings.....try to use a lot of clever instancing features...
Peter
Ps.: buy yourself a 150 $ tablet and use THAT for surfing in the net.....that saves you
from having to much junk on your workhorse.....it also saves a lot of energy.....