Documentation10 PCI Express x1 cardconnector11 PCI Express x16 cardconnector12 PCI Express x4 cardconnector13 PCI card connectors 14 floppy drive connector(FLOPPY)15 PS/2 and Serial connector16 card fan connector 17 thermal sensor connector 18 processor fan connector19 processor and heat sinkconnector20 processor power connectorMemoryYou can increase your computer memory by installing memory modules on the system board. For information on the typeof memory supported by your computer, see Memory.Memory Overview● Memory modules should be installed in pairs of matched memory size, speed, and technology for best performance.Otherwise, the computer will continue to operate, but with a slight reduction in performance. See the label on themodule to determine the module's capacity.1 memory module 2 memory module capacity labelNOTE: Always install memory modules in the order indicated on the system board.The recommended memory configurations are: