Quad E7440 5U server... With a wack load of ram. Not that it is practicle but I'd love to find 4 cheap waterblocks just because
The new server was throwing ram errors on POST but I think i have it sorted out took some noise measurements.
The 1U Asus has dual e5420's and the 5U has quad E7440 not that the CPU makes a difference in startup noises but the difference in CPU power to noise becomes more interesting with the sacrifice of space.
At startup with everything is full bore both were ~72dB
The 5U sitting on the carpet of my basement was ~50dB at idle
The 1U in the cabinet lined with sound deadening material and the door open was ~62dB
The 1U with the door closed was ~42dB. (20dB drop just from closing the door)
have not gotten the 5U into the cabinet yet to take readings I want to make sure that the ram post errors are gone.
The pitch of the 1U however with over a dozen of those 40mm fans just carries though through the whole house even with the cabinet closed. If the 1U drops 20dB just being in the cabinet, if the 5U also drops 20dB combined with the lower pitch that isn't nearly as ear peircing should be a much quieter computer to leave running.