Just to show what is possible:
CPU: 48.7 GPU: 38.3 EDRAM: 38.7 MB: 29.2
after 1h in xexmenu 1.1
Jasper 256MB, vertical position
My mods:
NO stock fan
NO DVD-Drive (its useless with xbr, anyway)
internal HDD
(red)80mm Revoltec Air Guard at stock fan controller running at 100% (unhearable) over HANA
(yellow)120mm Noctua NF S12-1200 running at 12V (unhearable) over CPU/GPU Heatpipe
(green)Heatsinks on HANA/RAM
![IPB Image](http://img259.imageshack.us/img259/7181/xbox360mainboard.jpg)
I had 52°CPU, because the airflow is kinda bad with the fan on top. Since i had 4 RAM Heatsinks left i just placed those at the side of the CPU cooler straight into the airflow, which brought the CPU down to ~49°C.
I have a cool and quiet xbox360 now.