Dell OptiPlex 390 (Mid 2011) - Manual (Page 86)

External Connectors
Back Panel: 6
Video 15-pin VGA connector, 19-pin
HDMI connector
NOTE: Available video
connectors may vary based
on the graphics card selected.
System Board Connectors
PCI Express x1 data width (maximum) —
one PCI Express lane
Mini-Tower, Desktop three 36-pin connector
Small Form Factor one 36–pin connector
PCI Express x16 data width (maximum) —
16 PCI Express lanes
Mini-Tower, Desktop,
Small Form Factor one 164-pin connector
Serial ATA
Mini-Tower,Desktop four 7-pin connectors
Small Form Factor two 7-pin connectors
PS2/COM connector one 24-pin connectors
Memory two 240-pin connectors
System Fan
Mini-Tower, Desktop two 3-pin connector
Small Form Factor one 5-pin connector
Front panel control one 16-pin, two 10–pin, and one 5-pin
connector
Processor one 1155-pin connector
Processor Fan
Mini-Tower, Desktop one 4-pin connector
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