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Oracle® X5 Series Servers Administration Guide

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Updated: September 2017

Understanding Ultra Performance Computing

Ultra Performance Computing allows you to select one of several pre-configured settings that turn off numbers of cores, causing corresponding increases in the clock speed. This feature also configures the system so that the clock always runs at the indicated speed, removing jitter, or changes in clock speed due to conditions such as temperature or CPU load.

To change the Ultra Performance Computing settings, you must use the BIOS Setup Utility and reset the system. See Configure Ultra Performance Computing (BIOS).

Note -  You can also change the number of cores dynamically using Elastic Computing. For details, see Configure Elastic Computing.

The following table lists the available choices, including the number of active cores, and the corresponding clock speed:

Note -  The Intel Xeon E7-8895v3 processor has a core frequency of 2.6 GHz, but when Ultra Performance Computing is enabled, it has a maximum frequency of 3.3 to 3.5 GHz. Changing the number of active cores changes the maximum frequency, not the core frequency.
Number of Active Cores
Maximum Frequency
3.5 GHz
3.4 GHz
3.3 GHz
18 - Feature is disabled
2.6 Ghz

Enabling Ultra Performance Computing causes three changes to the system:

  • Turns off the corresponding number of cores

  • Increases the maximum frequency and locks the clock speed at the indicated value.

    Ultra Performance Computing is designed so that the CPU always runs at the indicated speed. This removes the possibility of "jitter" or changes in the system's clock speed.

  • Overrides all power management settings and disables those selections in the BIOS Setup Utility.