Here are the system hardware specs for my home Linux server. Although old, it is plenty powerful for file serving, web serving, A/V streaming, DHCP, DNS, etc. It is also nearly silent.
System Name: spock
Believe it or not, until I installed the Seagate drive, the noisiest component in the system was the buzzing from the LCD monitor. However, even in the Nexus enclosure, the Seagate drive noise is slightly noticable. It might be resonating with the drive cage in the rack case, so I plan to move it to another location.
Using ECC RAM is a clear benefit in a server. I went through two sets of generic RAM, and often had mysterious lockups. I've never had a lockup since I installed the ECC RAM.
(FWIW, I'm putting my system specs up here for my own reference, because once I button up a machine, I hardly ever remember what the heck I put in it 
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