System Board, Connectors, and Error Messages D-5System Board Internal ConnectorsCONNECTOR FUNCTIONJ9C1-D Processorfrequency1-2, 4-5: 233/100/90 MHz 21-2, 5-6: 200 MHz2-3, 5-6: 166/150 MHzJ9H1 Secondary IDE hard drive connectorJ10A1 System fan connectorJ10D1 Front panel connectors—speaker/ reset/power LED/HDD LED/reserved/sleep/powerJ10H1 Primary IDE hard drive connectorU3L1 CPU socket 71.150, 120 and 90MHz processors require 60 MHz bus freq.2. Processor default depends upon which system you have.System board slots and connectors