1) Motherboard packaging

Revision labels are shown on the side of the box.

 

 

2) Motherboard sticker

Look for the 'B3' sticker on the motherboard itself.

 

 

 

3) BIOS

The BIOS will show the chipset detected as a B3 stepping.

 

 

 

4) ASUS SATA Verifier

This software will also show the chipset detected as a B3 stepping.

 

 

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