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There is one server with Xeon 5690 and the output of /proc/cpuinfo is:

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Intel(R) Xeon(R) CPU           X5690  @ 3.47GHz
stepping        : 2
cpu MHz         : 3466.676

And then there is another server with Xeon E5-2690

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 45
model name      :        Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz
stepping        : 7
cpu MHz         : 1200.000

Why is the CPU Mhz for 2690 at 1200 while it should be at 2900. As it is the same for Xeon 5690. Can someone clarify?

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1  
Run something cpu intensive and then do cat /proc/cpuinfo again. –  Simplexion Dec 5 '12 at 5:41
    
What type of servers are these? Which power-saving and CPU performance settings are enabled in the BIOS? –  ewwhite Dec 5 '12 at 5:43
    
The power saving configuration on both are machines are (/sys/module/processor/parameters/max_cstate) set to 0 –  shoonya Dec 5 '12 at 6:19
    
Hi JAmes, already running CPU intensive processes. –  shoonya Dec 5 '12 at 6:29
1  
Sounds like regular CPU frequency scaling. –  scai Dec 5 '12 at 7:47

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