Lenovo IdeaCentre K330B Hardware Replacement Manual page 17

Microprocessor and heat sink
Microprocessor fan connector
Memory connectors (4)
Thermal sensor header connector
Power connector
SATA connectors (4)
eSATA connector
Power Fan connector
Front panel connector
Front USB connectors (3)
Serial(com2) connector
Front audio connector
PCI express X 1 adapter connectors (2)
PCI express X 16 adapter connectors (2)
System fan connector
12V power connector
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Hardware Replacement Guide