Supermicro AOC-SG-i4 REV: 1.01 Quad-Port RJ-45 PCI-Express 2.0 x8 Gigabit Ethernet Network Adapter Add-on Card. Supermicro's AOC-SG-i4 is a High-performance, Cost-effective quad-port Gigabit Ethernet Card. It provides industry’s best performance per cost ratio through its high-performing, PCI-Express 10/100/1000 Ethernet connection. A compact design controller that also improves flexibility and performance in a virtualized environment in multi-core systems by lowering interrupt overhead and providing sorted multiple data queue paths.