ok, well first of all the breathing holes for the fanes were facing towards the edge of my desk, so they wouldnt breath, so now ive moved it to the other side so its got lots of air.
Secondly, i opened up my computer and there was a dust bunny growing in there.
there was just so much dust, its was all cloged. i gave it a complete dusting and now its clean. i think it booted up quicker and feels smoother if you know what i mean, and its a hell of alot quieter, so i hope that should solve the problem
edit: sorry for double post, forgot i posted that before.