I get 4.4ghz stable only at 1.30V. I dont know how others get theirs above that as i'll get blue screen during windows booting if i ramp the multi to 45X. So far i only raise the Vcore , other voltage i haven't learn yet

If you use the TPU switch to OC , it is very normal. speed fluctuating because speedstep is enabled.

I use intel burn test to test my proc. Run 50 loops overnight before sleep.

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Added on January 22, 2011, 2:14 pmAdd-on for few other models:

P8P67 Pro BIOS 1253 -
http://www.mediafire.com/?gemf6h8zen58imx

P8P67 Deluxe BIOS 1253 -
http://www.mediafire.com/?15c36b4n5059x16

Maximus IV Extreme BIOS 0802 -
http://www.mediafire.com/?9ikxokjrd6l8joe


This post has been edited by k!nex: Jan 22 2011, 02:14 PM

Try your luck with these little things.

VCCIO (input output) = new term for Front Side Bus voltage
VCCSA (system agent)= new term for North Bridge Voltage

Things are different for Sandy Bridge. So the closest match with old proc terms is what i mentioned i guess.

Want to ask. I want to lower my current temperature.



BIOS settings:

Ai Tweaker
Ai Overclock Tuner: Manual
BLCK/PCIE Frequency: 100.0
Turbo Ratio: By All Cores
By All Cores: 44
Internal PLL Voltage: Enable
Memory Frequency: 1600MHZ
DRAM Timing Control: 9-9-9-24
EPU Power Saving MODE: Disabled

Ai Tweaker (in the DIGI+ VRM section)
Load-Line Calibration: Ultra High
VRM Frequency: Manual
VRM Fixed Frequency Mode: 350
Phase Control: Extreme
Duty Control: Extreme
CPU Current Capability: 140%
CPU Voltage: Offset Manual
Vcore: 1.335Volt
DRAM Voltage: 1.5V
VCCSA Voltage: Auto
VCCIO Voltage: Auto
CPU PLL Voltage: 1.8V
PCH Voltage: Auto
CPU Spread Spectrum: Disabled

What else can i do?? I cannot reduce my cpu vcore anymore as it will blue screen.

This post has been edited by k!nex: Sep 15 2011, 01:47 AM

If you want to hit 4.5ghz range , Asus P8Z68-V at RM500+ also can do already.

Sometimes even if you passed 500 rounds of LinX, this SB chip will sometimes bluescreen at idle.Load no problem. VRM Frequency tested from 350 to 500kHz .PC not doing anything,disabled standby in windows. Bluescreen code is x000000124 which is actually means not enough vcore. Even if you add vcore 1 or 2 notches up, it will not stabilise anyhow. I found that sometimes dropping the CPU PLL voltage does the trick for this problem. I only tried on i5 2500k, no i7 to test.