These small diameter tray form factor server fans have to spin like jet engines to keep the server cool. I set them up with but high rise fans sticking out like a blower on a hemi. That quieted them down.
Notes
Noise reduction for development server
- Use Xeon heat sinks rising up above case lid
- Use low noise 40mm fans qty=4 in place of the stock 25 cfm units: FAN DC AXIAL 12V 40X28 TAC OUT – FFB0412SHN-F00
- Socket = 604 with pins – appears 603 and 604 series heatsinks will both work
Parts for solution = high rise heat sink with fan on both cpu's
- Cooljag JAC268A Cooljag
- Low Noise parts – Acousticpc
- #1 Xeon Heatsink / fan on ebay – low cost seller
- Better description on item of #1
- A similar fan with acoustic rating of 30dba
Parts for solution = replace noisy fans with quiet ones
- assembly with 4 sets of 2 5cfm fans back to back – Dell PowerEdge 1850 Cooling Fan PN# Y2205 Set of 4 fans Datasheet for fans used in the assembly 28dba for a single fan on low, on high is 60dba …bad!! Saw a comment in the silent server article about how is trying to replace this!
Part No. D06T-12PS2 AJ
- Nidec Beta SL DC FAN
- 3wires
- 60x60x25mm, DC12V, 0.25A
- Ball Bearing middle Speed 4360RPM
- Noise : 30dBA
- Air flow : 36.0 m³/h
- Operating Temperature : -10~+70C
- Connector : Ampex 2510, 3pins, 2.54mm
- 24AWG Wire, L=250mm
| Location | Effects | Leq (dBA) | Time (hours) | Time of day |
| Bedroom | sleep disturbance, annoyance | > 30 | 8 | night |
| Living area | annoyance, speech interference | > 50 | 16 | day |
| Outdoor living area | moderate annoyance | > 50 | 16 | day |
| Outdoor living area | serious annoyance | > 55 | 16 | day |
| Outdoor living area | sleep disturbance, with open windows | > 45 | 8 | night |
| School classroom | speech interference, communication disturbance | > 35 | 8 | day |
| Hospitals patient rooms | sleep disturbance, communication interference | > 30-35 | 8 |
day and night |
Dell Gx620 noise levels for reference –
Declared Noise Emissions in accordance with ISO 9296
Service Level Sound Power
(LWAd, bels) (1 bel=10 decibels, re 10-12 Watts)
Sound Pressure Operator Position
(LpAm, decibels) (re 2×10-5 Pa)
Floppy Drive Accessing 4.5 36.3
Hard Drive Accessing 4.2 32.2
CD Drive Accessing 5.2 45.4
Idle 3.8 29.6
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