MSI P67A-GD80 (B3) manual Manual OC Overview

Manual OC Overview

Starting from the Sandy Bridge series, MSI will now adopt the new UEFI BIOS as well as Click BIOS into its products. Previously, overclocking options were listed in the “Cell Menu” those options can now be accessed by clicking on the “Overclocking” picture.

Note that the Memory Frequency adjustment is also limited by CPU base clock. With the default 100MHz base clock, the possible memory frequency are as follows: DDR3-800MHz, DDR3-1066MHz, DDR3-1333MHz, DDR3- 1600MHz, DDR3-1866MHz, and DDR3-2133MHz. Any overclocking to the memories will require adjustments to the base clock.

Frequency Setting

Limitations of CPU base clock introduced by the Sandy Bridge series means that there will only be a limited range of adjustment. Therefore, to over- clock effectively, we will have to mainly increase the CPU ratio and leave CPU base clock to make fine adjustments. The range of possible CPU ratios based on the CPU will be reflected in the BIOS.

Voltage Setting

CPU Voltage, CPU IO Voltage (VTT), DRAM Voltage, System Agent Voltage, and etc can be access in the “OC” options. The parameters relevant to CPU overclocking are CPU Voltage and IO Voltage. The parameters relevant for memory overclocking are DRAM Voltage and IO Voltage. In addition, Internal PLL Voltage affects K SKU CPU’s overclocking ability; we recommend turning on this option when overclocking. Important to note that the CPU has built-in protections that will decrease CPU ratio if the CPU is too hot; thus, when increasing the voltage, be aware that there may be circumstances where more higher voltage may lower system performance.

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