The diagram identifies the main components of Intel® Desktop Board DQ77CP.

Label Description A Conventional PCI add-in card connector   B Conventional PCI add-in card connector   C PCI Express* x1 add-in card connector D PCI Express* x16 add-in card connector E Back panel connectors F 12 V processor core voltage connector (2 x 2 pin) G LGA1155 processor socket H Rear chassis fan header I Processor fan header J DIMM 3 (Channel A DIMM 0) K DIMM 1 (Channel A DIMM 1) L DIMM 4 (Channel B DIMM 0) M DIMM 2 (Channel B DIMM 1) N Front chassis fan header O Chassis intrusion header P Low Pin Count (LPC) Debug header Q Main power connector (2 x 12) R Intel® Management Engine BIOS Extension (Intel® MEBX) Reset header S Battery T Piezoelectric speaker U e-SATA 3.0 Gb/s connector (red)  V Alternate front panel power/sleep LED header W Front panel header X Standby power LED Y BIOS Setup configuration jumper block Z SATA 3.0 Gb/s connectors (black) AA SATA 6.0 Gb/s connectors (blue)  BB Front panel USB 3.0 connector (blue) CC Intel® Management Engine “M” state LED DD Intel Q77 Express Chipset EE Front panel USB 2.0 connector FF Front panel USB 2.0 connector GG Serial port connector HH S/PDIF out header II Front panel audio header JJ Internal mono speaker header

This applies to:

Intel® Desktop Board DQ77CP