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For contemporary Intel processors, the frequency is controlled by the processor itself and the P-states exposed to software are related to performance levels. The idea that frequency can be set to a single frequency is fiction for Intel Core processors. Even if the scaling driver selects a single P state the actual frequency the processor will ...


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Visit your BIOS config page and check processor settings. Do you see a value of "4" for "Number of Cores per Processor"? Also, can you provide the build number of your ESXi installation? This could also be a bug (less likely).


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After some experimentation, I think I can answer my own question. As mentioned in this thread, on certain Intel hardware, there are two ways to manage the CPU frequency: Using pstate. Using regular ACPI. When pstate is used, the BIOS has some say over the clock speed, and it seems that this is the source of the fluctuations. You can force pstate off by ...


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While Sandy Bridge is way faster than a similarly clocked Harpertown, you selected a very low-end Sandy: it has no Turbo, no HT, and its clock frequency is very low. Here you can find some benchmark between two similarly clocked Harpertown and Nehalem system. As a rule of thumb, consider an equally clocked Sandy-Bridge system about 30% faster than a Nehalem ...


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Looking at the specs is only part of evaluating a new system. To do the job properly you have to benchmark the old and new systems under typical workloads. Only when you have done that can you make an informed decision.


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You want to use two identical processors. Since you already have an E5507 you want to add another E5507. The alternative is to upgrade both CPUs. In which case you need to: Check that the CPU does not draw more power than the motherboard can safely supply. (The current CPU has an 80 Watt TPD).[edit] The board does seem to support this 130W TDP CPU, so ...


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The percent of CPU used is in relation to the usage of a single core. If a process is using multiple cores the system can report more than 100% CPU utilisation. You'll need to look into what those php-cgi processes are used for. When running top you can press c to show the full command, or you can use ps -ef | grep php-cgi to see the full command. If ...


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"Therefore, for primarily single (or limited) thread applications, it is sometimes best to set the CPU affinity to a specific core, or subset of cores. This will allow the 'Turbo' processor frequency scaling to kick in and be sustained (instead of skipping around to various cores that may not be scaled up, and could even be scaled down)." "As of now no OS ...



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