Integrated High Definition audio (Realtek ALC261 or similar). Ethernet: Intel 82579LM Gigabit Network Connection. Rear I/O Panel Ports
One PCI Express x16 slot allows the addition of a dedicated graphics card. hp fxn1 e93839 motherboard specs
Your upgrade options are almost entirely dictated by the physical size of your computer. Integrated High Definition audio (Realtek ALC261 or similar)