MSI Z97 PC Mate Preface page 80

▶ CPU Current limit (A) [Auto]
Sets maximum current limit of CPU package in Turbo Boost mode. When the
current is over the specified limit value, the CPU will automatically reduce the core
frequency for reducing the current.
▶ 1/2/3/4-Core Ratio Limit [Auto]
These items only appear when a CPU that support this function is installed. These
items allow you to set the CPU ratios for different number of active cores in turbo
boost mode.
BIOS Setup 3-24