Dell PowerEdge R540 Fan Spacer for Noctua NF-A6x25 PWM 60mm Fans

This spacer allows you to reuse the Dell standard performance fan trays for installing Noctua NF-A6x25 PWM 60mm fans in the original Dell 60MM fans. The tolerances are tight for the holes that slide into the fan tray pins and the nub that slide into the Noctua fan screw holes. The top plate from the original Dell fan tray does not fit due to locking mechanism interference. Centering the fan between each side of the tray doesn't look like it would work either as the fan frame interferes with the locking latch.

I printed these with .2mm layer height and full supports. If your first layer has a lot of squish due to tight bed leveling tolerances or z offset, you may need to use a blade to clean the holes.

Use the information below at your own risk:

R540 60MM Standard Fan Wiring for no iDRAC RPM control. The Noctua fans will run at max RPM at all times:

Dell Red - Noctua Yellow
Dell Black - Noctua Black
Dell Yellow - Noctua Green
Dell Blue - Do not use

On the latest Dell PowerEdge iDRAC firmware, you can no longer adjust fan speeds via RACADM commands as you could with older versions. Once you've updated the iDRAC to the latest firmware version, you cannot roll it back to a version supporting RACADM fan control due to a board firmware upgrade that occurs after 3.30.30.30. To avoid the minimum RPM alerts being triggered in the iDRAC when the fans are throttled down, do not connect the PWM Signal wire, only wire the +12v, Ground and RPM Speed Signal wires. This will make the Noctua fans run at 100% speed regardless of what command the iDRAC is sending to the fan header and keeping the fans out of the minimum RPM alert range. Obviously, if you are running a high end processor or pair of high end processors, you probably shouldn't be installing Noctua fans due to the reduction in airflow, but for a low TDP server in a home environment, it's a must.