o If there is a fan port near the CPU cooler
---- put a fan in it, pulling hot air out (exhaust)
o Verify the air intake holes are free/clear
---- eg, not obstructed by carpet or overly small

An Athlon 1400 does not create a particularly large amount of heat,
it is probably no more than 70W even under absolute maximum load.
In terms of cfm that requires barely more than 14cfm to cool it.

Your cooler is not particularly inefficient - it is reasonably large,
so the issue is then is it 1) fitted correctly 2) excessive thermal
compound 3) recirculating its own hot air. A guide for that is
case temperatures - rear-upper exhaust, front-lower intake.

You can fit all the fans you want, but the weakest link is the size
of the hole that air is drawn into at the front - often very small.

The ideal cases are those where an exhaust fan is fitted behind the
CPU or near the CPU to remove the hot air. Most CPU-coolers
use impingement (fan blowing on a heatsink plate, air forced thro
90-degrees) and as such they can recirculate 40-70% of their air.
So whilst a cooler may only need 14cfm for the heat output of the
CPU, if it recirculates 50% - so 28cfm is needed to compensate.

Case temperatures are one guide, but so are CPU temperatures.

A PC doesn't emit (that) much heat:
o CPU + Graphics + HD/RAM = 75+50+25 = 150W
o PSU will draw 20% more re inefficiency = 180W total

1500W can be cooled by 300cfm, 180W requires 36cfm.
That is not a particularly large - or noisy - amount of airflow.

However, CPU cooler efficiency re not recirculating its own air
is important - air velocity out of a cooler is low, easy to recirculate.
--
Dorothy Bradbury
www.stores.ebay.co.uk/panaflofan for fans, books & other items
http://homepage.ntlworld.com/dorothy...ry/panaflo.htm (Direct)