How to give a 'Quiet freek' Computer Geek a stroke

Put him in a round room with a thousand running cooling fans and tell
him
there is a overheating AMD with a (Hot running?) 7200 rpm HD in the
corner.
Then these 10000 rpm drives must need a water cooler?..those evil cooler
manufacurers should stop spreading such rumors.

*smile*.

Some companies are rejecting the latest 1U rack servers on noise conditions:
o 6-8 fans per 1U - Sanyo Denki 13.4-15cfm 40x40x28mm fans - 40dB(A),
15,300-17,000rpm
---- great almost blower-like cooling with superb static pressure & airflow
---- just sound like an Indy/F1 engine on the television re rpm scream
(muted tho)
o Multiply by 48 racks - Usually only 40 in a rack for other structured
cabling / load-balance
o Multiply by 2-8 racks

Net result is a crescendo of noise from that lot.

Hence I designed my own cases, blow-thro design, far lower temps & no A/C
needed
if ambient is below 35oC in the building. It does require building hot air
removal fans,
which are not an insignificant wattage in total - altho environmentally
controlled. So
no 90dB(A) machine room and instead a much more pleasant 52-65dB(A).

Using a 5.25" kit for a 3.5" drive can help the airflow around the drive.

PCI/Graphics cards benefit from:
o Side-mounted small fan blowing air at them
---- or if case has positive pressure, removing hot air from them
o Suspended fans near them, allow far quieter operation
---- easy to suspend 60/80mm fans nearby
---- beware many 60mm fans are not silent
---- reason being 80mm hub on 60mm form-factor = more rpm = more noise

Use cfm carefully vs using excessive amounts of it re noise.
--
Dorothy Bradbury