The hardware has not changed,
/proc/cpuinfo
========
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
stepping : 11
cpu MHz : 3150.223
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
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 aperfmperf pni dtes64 monitor
ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow vnmi flexpriority
bogomips : 6300.44
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
dmidecode
=======
Processor Information
Socket Designation: Socket 775
Type: Central Processor
Family: Other
Manufacturer: Intel
ID: FB 06 00 00 FF FB EB BF
Version: Intel(R) Core(TM)2 Quad CP
Voltage: 1.3 V
External Clock: 350 MHz
Max Speed: 4000 MHz
Current Speed: 2800 MHz
Status: Populated, Enabled
Upgrade: Socket 478
L1 Cache Handle: 0x000A
L2 Cache Handle: 0x000B
L3 Cache Handle: Not Provided
Serial Number:
Asset Tag:
Part Number:
--
/proc/cpuinfo bad cpu speed detection
https://bugs.launchpad.net/bugs/236348
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