The top of the box with the motherboard and other main components
like the CPU. Zalman heatsink for the GPU and CPU. I get vibrations
from the CPU fan, I will probably suspend that one in foam or rubber
some day. When I figure out how. 

Air duct for the intake air to blow as much cold air as possible on
the GPU and CPU. Made by amazon.com. Or at least from cardboard
shipped from them. :-) 
<br clear=left><img src=../pics/usetop.jpeg width=1550 height=1272><br>