ECS H61H2-I2 User Manual page 47

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Enhanced Intel SpeedStep Technology (Enabled)
This item allows users to enable or disable the EIST(Enhanced Intel SpeedStep
Technology).
Graphics Core Ratio Limit (20)
This item allows you to control the internal GFX Turbo ratio.
Graphics Voltage(1/256) (0)
This item allows you to adjust the internal GFX voltage.
Using BIOS