MSI P67A-GD80 (B3) manual P67A-GD80 B3 OC setting reference table

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.

Reference setting : DDR3-2242MHz

• CPU Voltage: 1.4V	•	DRAM Voltage: 1.65V Base Clock: 10499KHz
• CPU IO Voltage: 1.35V	•	CPU Ratio: 33

P67A-GD80 (B3) OC setting reference table

Tuning Item	Default	Increment	Easy	Normal	Fun	Danger	Not Recom-
							mend
CPU Ratio	34	1	34~40	40~45	45~50	50~55	>56
CPU Vcore	1.160	0.005	~1.3	1.3~1.4	1.4~1.5	1.5~1.6	>1.6
(V)
CPU IO Voltage	1.112	0.0265	~1.2	1.25~1.3	1.3~1.4	1.4~1.5	>1.5
(V)
Memory Frequency	DDR3-	Depends	DDR3-	DDR3-	DDR3-	>DDR3-	> DDR3-
		on DRAM
(MHz)	1333		1333~1600	1600~2000	2000~2133	2133	2300
		Ratio
RAM Voltage	1.472	0.007	1.5~1.6	1.6~1.65	1.65~1.8	>1.8	>1.9
(V)

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:1.7V

•CPU IO Voltage:1.5V

•DRAM Voltage:1.9V

We suggest disable some items in BIOS,such as Green Power Phase Contral and OverSpeed Protection.

18 P67A-GD80 (B3) Overclocking Guide P67A-GD80 (B3) Overclocking Guide 19