Open up your intake, not fan quantity :-)
300cfm will cool 1500W
100cfm will cool 100W
The problem is getting the right cfm to the right place at the
right time - admittedly more fans is easier than ducting :-)
Most cases have very poor air intake:
o Case punching = high resistance to airflow
---- slotted/hole punching = 45-55% brick wall
---- round wire grill = 9-11% brick wall
---- so a noise issue as well as airflow restrictive
o Plastic fascia can be the weakest link in the intake
---- often it is a simple 4"x1" cut-out
---- through which all your intake air must be drawn
If appropriate exhaust fans are fitted, a fan-less grill of 80mm,
92mm or even 120mm in the front-lower-side can boost cooling.
Cutting holes isn't easy - use a sheet-metal nibbler,
cheap part from automotive supply shops vs h/w stores.
--
Dorothy Bradbury
www.stores.ebay.co.uk/panaflofan (Ebay)
http://homepage.ntlworld.com/dorothy...ry/panaflo.htm (Direct)