Originally Posted by purduee
Let me know what your after readings are and what fans you select as replacements if you would.
I swapped out the fan in my ReadyNAS and it made a significant impact on noise and a very small impact on heat. I'd like to do the same with the Promise NAS, especially since it's running so cheap.
I just finished it up last weekend. I got 2 fans from Fry's Electronics. Both are ball-bearing from "Link Depot" they weren't expensive. But at full speed are a LOT quieter than the stock fans.
With the fans on, and all hard drives in the device, it meters around 55db now, which is quite a bit quieter no, can barely hear it running and the Tone of the noise is totally tolerable. The Wife immediately noticed how much quieter it is. Before it was 55db+ w/o the drives in it.
Now, for fans, I got a 40mm x 20mm for the power supply. I cut the wires in the power supply and heat-shrinked them to insulate. I'm not using these wires.
For the case, the stock fan is 80x15mm. I put an 80x30mm and it fits fine and it quieter. I had to get some short screws to mount the fan, but it looks stock in there and clean.
For wiring, I wired both fans to the MB using the stock wire from the original large fan. The small fan I cut the yellow (monitor wire) and only wired in the monitor for the large fan. I spliced all the wires and heat-shrinked to insulate. The output on the MB is 12v, but under load it drops to around 7v. I decided not to use the fan speed control I have as the speed is fine. If I wanted full speed I could have used the black/red wires in the power supply and attached the yellow to the MB for monitoring.
Before the tweak, fan speed was around 3000rpm according to the monitor screen. After the tweak the large fan is running around 1900rpm. Before the mod, with average room temp around 70-75, the case reported internal temp around 32c. After the mod, the temp rose slightly to around 36c after being on for a couple days. The alarm goes off at 50c. It will also go off if you drop below 1800rpm on the fan speed. I live in SoCal near the beach and it never gets very hot in here. In the summer maybe ambient temp around 75-80. So I expect drive temps to stay below 40c without much problem.
Anyway, getting the case open and soldering and routing a bunch of fan wires was a bit of a pain. But if you are comfortable with working on small electronics and a solder iron, its a pretty easy job. Just a lot of screws to get the power supply open. As an FYI, you don't need to fully open the power supply to get the fan out.
And the results were well worth it.
**** One more note: Promise just released an updated firmware for the device. Write speeds are up and so are reads. Maybe 10-20% faster during large file operations (which is all I have on it, VOB and lossless audio).