CPU not running at full speed in Ubuntu

[Steve]

Got a QX6700, CPU-Z reports 2.66GHz in Windows, but under Ubuntu Hardy, /proc/cpuinfo reports this:

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 15
model name	: Intel(R) Core(TM)2 Quad CPU           @ 2.66GHz
stepping	: 7
cpu MHz		: 1602.000
cache size	: 4096 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips	: 5349.46
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 15
model name	: Intel(R) Core(TM)2 Quad CPU           @ 2.66GHz
stepping	: 7
cpu MHz		: 1602.000
cache size	: 4096 KB
physical id	: 0
siblings	: 4
core id		: 3
cpu cores	: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips	: 5345.47
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

processor	: 2
vendor_id	: GenuineIntel
cpu family	: 6
model		: 15
model name	: Intel(R) Core(TM)2 Quad CPU           @ 2.66GHz
stepping	: 7
cpu MHz		: 1602.000
cache size	: 4096 KB
physical id	: 0
siblings	: 4
core id		: 1
cpu cores	: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips	: 5345.49
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 15
model name	: Intel(R) Core(TM)2 Quad CPU           @ 2.66GHz
stepping	: 7
cpu MHz		: 1602.000
cache size	: 4096 KB
physical id	: 0
siblings	: 4
core id		: 2
cpu cores	: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips	: 5345.44
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

Any ideas what's up there? EIST and C1E are off.

CPU is sat in an Abit IX38 QuadGT with the latest BIOS.

[Steve]

Fixed it.

Turned C1E/EIST back on because it wasn't those causing it. It was gnome's settings for cpufreq scaling.

run gconf-editor

Then expand apps->gnome-power-manager->cpufreq

I kept the profiles set to "ondemand" (so it'll scale up CPU clock as needed) ticked the "consider nice" box so that it wouldn't ignore folding, which runs niced.

Folding at full speed now.