Sorry FF, I did one more time and doesn't work:
in root terminal : modprobe p4-clockmod
cpufreq-set -c 0 -g conservative -d 667mhz -u 2670mhz
cpufreq-set -c 1 -g conservative -d 667mhz -u 2670mhz
cpufreq-set -c 2 -g conservative -d 667mhz -u 2670mhz
cpufreq-set -c 3 -g conservative -d 667mhz -u 2670mhz
cpufreq-info
cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.00 ms.
hardware limits: 333 MHz - 2.67 GHz
available frequency steps: 333 MHz, 667 MHz, 1000 MHz, 1.33 GHz, 1.67 GHz, 2.00 GHz, 2.33 GHz, 2.67 GHz
available cpufreq governors: ondemand, conservative, powersave, userspace, performance
current policy: frequency should be within 667 MHz and 2.67 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 2.67 GHz (asserted by call to hardware).
analyzing CPU 1:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 10.00 ms.
hardware limits: 333 MHz - 2.67 GHz
available frequency steps: 333 MHz, 667 MHz, 1000 MHz, 1.33 GHz, 1.67 GHz, 2.00 GHz, 2.33 GHz, 2.67 GHz
available cpufreq governors: ondemand, conservative, powersave, userspace, performance
current policy: frequency should be within 667 MHz and 2.67 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 2.67 GHz (asserted by call to hardware).
analyzing CPU 2:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 2
CPUs which need to have their frequency coordinated by software: 2
maximum transition latency: 10.00 ms.
hardware limits: 333 MHz - 2.67 GHz
available frequency steps: 333 MHz, 667 MHz, 1000 MHz, 1.33 GHz, 1.67 GHz, 2.00 GHz, 2.33 GHz, 2.67 GHz
available cpufreq governors: ondemand, conservative, powersave, userspace, performance
current policy: frequency should be within 667 MHz and 2.67 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 2.67 GHz (asserted by call to hardware).
analyzing CPU 3:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 3
CPUs which need to have their frequency coordinated by software: 3
maximum transition latency: 10.00 ms.
hardware limits: 333 MHz - 2.67 GHz
available frequency steps: 333 MHz, 667 MHz, 1000 MHz, 1.33 GHz, 1.67 GHz, 2.00 GHz, 2.33 GHz, 2.67 GHz
available cpufreq governors: ondemand, conservative, powersave, userspace, performance
current policy: frequency should be within 667 MHz and 2.67 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 2.67 GHz (asserted by call to hardware).