TS-7820 CPU Clock

By default the CPU included is rated for 1333MHz. The CPU will be clocked up to this max speed by default at all times. It is possible to adjust this clock speed to 1066MHz, or 666MHz. Note that this does improve the power dissipation when the cpu would otherwise be loaded, but reducing the clock speed of this CPU does not reduce dissipation when the cpu is idle. Running at 1.3GHz with both cores enabled at idle is the same power consumption as 666MHz with only one core.

See the #Power_Consumption section for more information on these savings when loaded.

To reduce the clock speed:

# Specify the rate you want with 1066 or 666 directly:
tshwctl -l 1066

# Specify 0 to attempt to auto set back to the max:
tshwctl -l 0

# tshwctl 1 core instead of two
ts7800ctl -c 1

These commands will require a power cycle.