Z68a-gd80 oc setting reference table, Max gpu frequency – MSI Z68A-GD80 (G3) Quick Guide User Manual

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Z68A-GD80 (B3) Overclocking Guide

Max Memory Frequency

Memory overclocking on the Sandy Bridge is limited by the Memory Ra-
tio. Memory frequency can only be set to 800MHz, 1066MHz, 1333MHz,
1600MHz, 1866MHz, or 2133MHz.
In other words, the most stable memory overclock that can be achieved with
XMP is 2133MHz. To increase the frequency even further, the Memory Ratio
will need to be adjusted along with CPU base clock and voltage.

• CPU Voltage: 1.35V

• CPU IO Voltage: 1.35V

• DRAM Voltage: 1.65V

• CPU Ratio: 33

Base Clock: 102MHz

Reference setting : DDR3-2176MHz

Z68a-Gd80 OC SEttInG REfEREnCE taBLE

Max GPU Frequency

Players can overclock the GPU embedded in CPU due to the Z68 chipset cov-
ers all the overclocking abilities of H67 chipset. Although the performance of
the Sandy Bridge GPU cannot keep pace with the add-on graphics cards, you
can still have some fun in overclocking. Simply activating the GT Overclcok-
ing and tuning the GT Ratio and GPU Voltage, it is so easy to overclock the
GPU.

Tuning Item

Default

Increment

Easy

Normal

Fun

Danger

Not Recom-

mend

CPU Ratio

34~40

40~45

45~50

50~55

>56

CPU Vcore

(V)

1.160

0.005

~1.3

1.3~1.4

1.4~1.5

1.5~1.6

>1.6

CPU IO Voltage

(V)

1.112

0.0265

~1.2

1.25~1.3

1.3~1.4

1.4~1.5

>1.5

Memory Frequency

(MHz)

DDR3-

1333

Depends

on DRAM

Ratio

DDR3-

1333~1600

DDR3-

1600~2000

DDR3-

2000~2133

>DDR3-

2133

> DDR3-

2300

RAM Voltage

(V)

1.472

0.007

1.5~1.6

1.6~1.65

1.65~1.8

>1.8

>1.9

GPU Frequency

(MHz)

850~1350

1100~1300

1300~1450

1450~1600

1600~1750

>1800

GPU Voltage

(V)

0.44

0.005

1.0~1.2

1.2~1.3

1.3~1.4

>1.4

>1.5

Note:

1. The reference value above is for Core i7 2600K D2 ver. Processor.
2. The condition is based on air cooling.
3. BIOS Internal PLL Voltage function enable.
4. Increasing voltage may raise the success rate of overclocking as the risk of damage

the CPU; thus,we suggest use the special design CPU cooler set to prevent the CPU
from overheating.

5. Below voltage value would cause the damage of component while under air cooling.

• CPU Voltage:1.6V
• CPU IO Voltage:1.5V
• DRAM Voltage:1.8V
• GPU Voltage:1.4V

We suggest disable some item in BIOS,such as Green Power Phase Control and

OverSpeed Protection.

Reference setting : GPU-1800MHz

• GT Overclocking : Enable • GPU Voltage : 1.400V • GT Ratio : 36