ASROCK Rack C2750D4I User Manual page 45

Intel Turbo Boost Technology
Use this item to enable or disable Intel Turbo Boost Mode Tech-
nology.Turbo Boost Mode allows processor cores to run faster
than marked frequency in specific conditions. The default value is
[Enabled].
Active Processor Cores
Use this item to select the number of cores to enable in each pro-
cessor package. The default value is [All].
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