ASROCK K10N78M PRO User Manual page 52

DRAM Voltage
Use this to select DRAM voltage. Configuration options: [Auto], [1.80V],
[1.85V], [1.90V], [1.95V], [2.00V], [2.10V], [2.15V] and [2.20V]. The default
value is [Auto].
Chipset Voltage
Use this to select chipset voltage. Configuration options: [Auto], [1.10V],
[1.15V], [1.20V] and [1.25V]. The default value is [Auto].
IGPU Boost
This allows you to enable or disable the IGPU Boost feature. If you select
[Enabled], iGPU will be in overclocking mode, which will increase the system
performance but may affect the system stability. If you select [Disabled], iGPU
will not be in overclocking mode.
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