I've built this fan in my Synology DS115 because of me actually already quietly original fan has yet disturbed. The results is more than satisfactory, the max. Speed is limited via the supplied Ultra Low Noise Adapter at 1600 RPM. The Disk Station is working properly and the fan is inaudible. Test, I've got the fan control changed over time, that the fan runs even in hard disk standby on and had already look if he really runs. At higher speeds (other adapter) you can hear a bit, but is quieter than the original fan. Is definitely a recommended replacement fan for Synology DiskStation DS115.
