Biostar X470GTA, Руководство пользователя

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14 | Chapter 2: Hardware installation
Clear CMOS Procedures:
1. Remove AC power line.
2. Set the jumper to “Pin 2-3 close”.
3. Wait for five seconds.
4. Set the jumper to “Pin 1-2 close”.
5. Power on the AC.
6. Load Optimal Defaults and save settings in CMOS.
BIOS_SW1: Dual BIOS Switch
The Dual BIOS Switch allows you to choose one of the BIOS ROMs (ROM1/ROM2) for boot up.
Main BIOS (ROM1) Enabled
The LED indicator (ROM1_LED) will light
and the Main BIOS is enabled.
Backup BIOS (ROM2) Enabled
The LED indicator (ROM2_LED) will light
and the Backup BIOS is enabled.
Note
»
Do not use this switch when your system is power-on.
»
Before flashing BIOS ROMs, please make sure this switch is set to the BIOS ROM which you want to
update.
2.7 Headers & Connectors
ATXPWR1: ATX Power Source Connector
For better compatibility, we recommend to use a standard ATX 24-pin power supply for this
connector. Make sure to find the correct orientation before plugging the connector.
Pin Assignment Pin Assignment
13 +3.3V 1 +3.3V
14 -12V 2 +3.3V
15 Ground 3 Ground
16 PS_ON 4 +5V
17 Ground 5 Ground
18 Ground 6 +5V
19 Ground 7 Ground
20 NC 8 PW_OK
21 +5V 9 Standby 5V
22 +5V 10 +12V
23 +5V 11 +12V
24 Ground 12 +3.3V