dont even bother trying... you will kill it.
even tower versions die , you need to cool it alot and cool it the correct way, in the long run it will die....in a desktop ....much faster...
get yerself a cheap tower and build! ... or use your old lego from when u was a kid, makes a nice tower...not exactly cheap (since lego is expensive) but i guess u have them bricks still eh?

good luck!