I wrote recently about a small Linux machine that I had built to act as a SOHO NAS. The machine worked well with one exception: the very noisy power supply (louder than the quad-core workstation that sits beside it). For my sanity, I’ve now replaced the stock supply with a silent unit. On request, I’ve also measured the machine’s power usage, hard drive temperatures, and taken a few photos. Read on for the updates.
With a simple inline power meter (thanks Steve, I will return it … someday), I measured the NAS power draw at the socket as between 35-45W depending on what it was doing. That’s not bad considering it has a dual core CPU, 2GB of DDR3 RAM and three physical hard drives in there. hddtemp reported all three hard drives running at between 32-35C with the extra case fan disabled.
Armed with the power figures, and after some consultation with the helpful folks at lintx.com, I decided on a PicoPSU-90 coupled with a 60W power brick as sufficent for a replacement, and silent, power supply.
It was reasonably tricky to remove the existing PSU unit from the CiT S003b case. There were a number of hard to see (and reach) screws that had to be taken out in order to remove an outer case panel that was covering access to the PSU screws. In comparison, fitting the PicoPSU was trivial, and I even managed to mount the power brick internally to the case and reuse the existing IEC inlet for a very tidy result.
And the best part? It’s now totally silent. Apart from the whiny CPU fan that’s now audible.