In my case the USB connected fan which was shipped with it had to be replaced for a more silent and heat controlled one and that one is now connected to the board (connector was already in the package). If you dont care about the noise the original is just great. The machine itself is awesome, running Proxmox VE with 3 VMs: pfsense firewall, debian with pihole & vpn server and another debian VM for various other specific server applications. works like a charm, still much more power unused. unfo at the moment of review sold out, i would have bought more.