CENTOS 5.3 With Core 2 Quad

i have a CENOTS 5.3 server / i686 with a Q8200 core 2 quad processor,

for some reason when I run

cat /proc/cpuinfo each cose doesn;t report that its running full speed..

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Core(TM)2 Quad CPU Q8200 @ 2.33GHz
stepping : 7
cpu MHz : 1998.000
cache size : 2048 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
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 nx lm constant_tsc pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4668.98

it shows all 4 cores but look at the MHZ, is there something i can do about this to fix this?