60mm, 80mm & 92mm fans usually have the same hub size.

Choose a good heatsink like the SLK, then either size fan.
However, keep cfm scaled proportional to thermal load:
o A 25cfm fan will cool 125W of CPU
o A 43cfm fan will cool 215W of CPU

So either is beyond the hottest P4-Prescott - and L spec Panaflo.

Instead ensure you are removing hot air from the CPU cooler area
rather than recirculating it. If your CPU-cooler recirculates 50% of
its air then a 75W CPU that requires 15cfm now needs 30cfm. That
is easiest with an exhaust fan near the CPU on the rear of the case.

You don't need screamers, just design a system level solution.
--
Dorothy Bradbury
www.stores.ebay.co.uk/panaflofan for fans, books & other items
http://homepage.ntlworld.com/dorothy...ry/panaflo.htm (Direct)