How did you swap out the original fans? Please tell me you didn't have to rip out the mobo to get at those screws?I've been running a E300-8D system as pfSense router / firewall for over 6 months now and i replaced the 2 stock fans with 3x SuperMicro FAN-0100L4 and its much quieter than stock. Still by far not silent enough to have it next to you, but a room away its fine.
They are also 40mm fans with the same connectors, just lower rpms.
CPU temp is 55 degrees @ 4300 RPM.
It's running 16G of 2133 ECC RAM and a Trancend MSA370 128G M.2 SSD and the riser with a dual 10G RJ45 X540 card.
Nevermind - just a little tug on the chassis holding the fans did it