erm... TS... your question doesnt meet the title of your topic..
if you wanna reduce heat: my own way last time... my modem have holes on the top(those small holes) then i fix a 80mm fan on top of the modem... not blowing air into modem but sucking up the hot air from the modem..

fast connection? you can tweak a bit about the setting but since its streamyx, so not much improvement can be done..