TYAN THUNDER K8SR Manual page 11

J42
J4
J14
J53
J34
J25
J76
J73 & J75
J4 SMBus 1.1 Connector
Use this connector to connect external SMBUS devices
Pin1: SMB_DATA Pin2: GND Pin3: SMBUS_CLK Pin4: NC
J14 Onboard Buzzer/Speaker header
Close Pin-3 and 4 (Default) - Onboard Buzzer Enabled
Open Pin- 3 and 4 - Disable onboard buzzer or connect to chassis
speaker
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