General Fan Performance Guide

Posted by Hemos on Monday October 29, 2001 @05:19PM from the getting-it-working dept.

Lars Olsen writes: "As a complementary article to his comprehensive General Heat Transfer Guide , Dave Smith has written another great article for Amdmb.com called General Fan Performance Guide. This is an indepth guide to the performance of the fans we have in our PC's. Here's a quote: 'The specific purpose of this guide is to take the science associated with fans and translate it into a meaningful document that will allow the reader to understand how fans work and how they apply to computers. It provides a brief summary of DC power and drives. It finishes with an introduction to the concepts of sound generation and measurement.'"

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Re:iMacs have no fan, Mac+ also silent, and Apple by Alan+Partridge · 2001-10-29 23:55 · Score: 1, Redundant

I'm a big Mac fan (no pun intended), but this guy is dead on. Current generation PowerMac G4s have an on-chip fan - all MPC7450 CPUs have had this function from clockspeeds of 667Mhz to the current (shipping) max of 867Mhz. I have a G4 with 2xMPC7400 CPUs at 500MHz - no on-chip fan but an ENORMOUS heatsink means that they rub at 37-43 degrees C under load.

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That was classic intercourse!