I noticed the (80mm) fan in my Sparkle, besides being soldered to the PSU (no easy sockets to plug into), has an extra blue wire, which I assume is the RPM-sensing one. Would it be OK to just replace ...

Aftermarket tachometers have been around for decades but in our market segment we've seen a paradigm shift away from the monster-tachs of days gone by to newer, lighter, more precise units. The aim is ...