We use it for health monitoring. It is located in second block (offset 0x08),
Offset 0x09: Temperature,
Offset 0x0A: Fan 1 speed,
Offset 0x0B: Fan 2 speed,
Offset 0x0C: Power Status,
Offset 0x0D: Temperature High Limit,
Offset 0x0E: Fan 1 speed Low Limit,
Offset 0x0F: Fan 2 speed Low Limit,
Offset 0x16: Firmware Version (for example, revision 2.1 would be 0x21).