1. Must connect 24pins+4pins ATX 12V power suppy at the same time to power on. 2. PCIe x1 slot share singal with M. 2 NVMe slot 2, can not to be used at same time. 3. Every new motherboard was tested with radiator totally before shipping, that is why copper plate seems to get traces of thermal grease. 4. Intel i226-V is a new network card, suggest to install newest version of following systems with supportable kernel: pfSense-CE 2.7, OPNsense 23. x, pfSense Plus, OpenWrt, ESXi, Proxmox 8. x, CentOS etc. Please make clear before buying.