I find that the one fan does the trick... You see you have got to remember, the air is directed from the front fan and the airflow continues in motion towards the back of the case, If you put any fans blowing sideways into this ducting system you will slow this airflow down. Think of a jet engine sucking air in and blowing out then a sidewind entering the side of the engine disrupting the flow..
Maybe that is a bit OTT for an explanation but its the best i got right now that describes the way i see it.
The fan i fitted was 70mm and running at 12v 3800rpm produces around 40cfm which for this application is more than fine. Check this out
http://cgi.ebay.com/...031010002r14483The XCM Cooler is a fan which dosent have the ducting system.
The back fans are fine with more volts unless you want cool looking LEDs
If you get this system up and running on a shoestring budget you will find it more satisfying.
If i was gonna add any more fans to this system it would be EXTERNAL fans blowing In on the opposite side to the HD.. See i dont think it is a good idea to have the 360 standing up because the low level heat from the CPU is rising up to the GPU and the pull of the heatsinks wont do a pre-rrod system any good.
Hope this helps!
Can u tell me the color code of those three wires.... plz help me where those 3 wires go?