Compaq AlphaServer ES45 1B Owner's Manual page 255

CPU temperature. In this example four CPUs are present.
Zone 0, 1, and 2 measure the temperature of the PCI compartment and are
reported from three thermal sensors located in different areas of the PCI
backplane.
Fan RPM. With the exception of Fan 5, all fans are powered as long as the
system is powered on. Fan 5 is Off unless Fan 6 fails.
The normal power supply status is either OK (system is powered on) or
OFF (system is powered off or the power supply cord is not plugged in).
FAIL indicates a problem with a supply.
CPU CORE voltage, CPU I/O voltage, and CPU cache voltage. In a healthy
system, all CPUs should have the same core voltage, the same I/O voltage,
and the same cache voltage.
Bulk power supply voltage.
Remote Management 6-17