WOW! I MUST applaud that response! Very nice, Now I know, and knowing is HALF the battle! G.I. Jo...er okay nm... Okay I see what you mean about the bearing thrusting. Still seems as if a fan with a not so good bearings (Less tolerance between race/ball Bearings) would suffer from this.... but any how, I went and tested a 172mm Rotron I had laying around and at 5v it spins quiet well, good flow, no noise, but you can hear a little whine, but it's not noticeable when inclosed in the computer with every thing one etc...
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XP 1600+ AGOIA-Y (GreenLabel, UNLOCKED!@/ NF7-S 2.0/ PC 2700 DDR
10.5*172FSB(1806/ 1991 high), Vcore 1.792...@84.95Watts
--86' Chevette Heater Core
--1/2" Vinyl tubes
--Via1300-Stealth Mod(QUIET!) 
---Home made copper-tube block
---PVC small internal res
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