4x 240-pin DDR3 DIMM slots, supporting up to 32GB of RAM. Expansion Slots: 1x PCI Express x16. 1x PCI Express x1. 2x PCI slots. Storage: 4x SATA III (6Gb/s) connectors. Critical Connector Pinouts
Often located on specific pins within the 14-pin block.
Includes 4x USB 3.0 , 2x USB 2.0, DisplayPort, VGA, and a Serial (COM) port. 4. Critical Connection Guide The Power Supply (PSU) Hurdle

