What is "PCB R 1.12" revision?

[PAT31850]

Was wanting to update my bios on ASUS P2B and got a note from ASUS saying what I could do. They told me which PIII I could use with a BIOS revision of 1011 or later and a PCB revisin of R 1.12. What is PCB revision?

 

[AndyHui]

Please see this thread.