During the last round of home lab host upgrades (post HERE) I moved away from the traditional ATX mid-tower cases I had been using and forewent the current trend of micro-ATX or Mac-Mini/NUC builds (though recently purchased NUC’s for a 2 node management cluster) to use rack mount servers. So far I have no regrets in making that choice as working on the systems as has been for simpler then in the past. Just unhook some cables and slide them out.
The trade off I made for this choice is these systems put off a far greater amount of noise then my previous systems. With 4 x 80MM fans per host only with active CPU coolers they could put off a decent hummm sound. While the systems passed the wife noise factor as the are resting in the garage, the hummmm sound grabbed my attention each and every time I stepped into the garage. It was like my own version of “The Tell-Tale Heart” or at the very least my adult ADHD kicking in.
I set out to do some research to see what options where available to me, and specifically for the SuperMicro server chassis. Hitting the Google’s I am stumbled across SuperMicro’s System Fan Matrix document, located HERE. Since I have model SC822 systems it showed that they are using a standard size 80 x 80 x 25 fan. The stock fan spins @ 3700 RPMs, moves 48.5 CFM of air, and is rated @ 36dBA. From the onboard IMPI interface of my motherboard I could see that my CPU temp hovered around 40 degrees Celsius with the fans spinning at 3000 RPMs.