To get back to the original question regarding BIOS Updates.
The latest BIOS for the GA-890FXA-UD5 (rev 2.1) says:
1. Support new JM363 version
2. Fix Cool'n'Quiet compatibility
According to the motherboard schematic it actually uses the JM362
So, is there an error in the info for the BIOS update or is it addressing another issue? It would help if this was made clearer in the update info.