mikrotik x86 8 core 4.5 ghz Industrial Mini PC 4 ether 2.5g 2 sfp+ level 6 ROS industrial Fisusen 12th generation intel core i3 1315U 82599 chip i226 4 ports 2.5G lan sfp 10 GB network port 8505i3i5i7-1365U I3 mt router low watt 12v input adaptor PFSense