The Purpose of this performance tuning guide is intended for validation and system characterization purposes only. The setting in this document is not fully validated and may not function across all the available K-processors. It is assumed that CPUs in the same family will have common settings. The new feature of the 4th Generation Intel® Core processor is an integrated voltage regulator (IVR). This new voltage regulator is integrated into the processor package and controls a number of voltage rails except Memory (Vddq). These rails include the IA Core rail, GT rail, System Agent rail, and IO-analog and IO-digital. The 4th Generation Intel® Core processor offers overclocking capability using the Intel® Turbo Boost Technology and with reference (BCLK) overclocking. In Turbo mode the processor could be running at any ratio in the inclusive range between Max Turbo and Max Non-Turbo. In BCLK, the Max Non-Turbo ratio has to be equal or less than the Max Turbo ratio.
Processor Core Configuration
Set Processor Idle State: High Performance
Adjust number of cores
You can disable hyperthreading
If you disable Turbo Boost the machine will run at max non turbo ratio set
Set all limits to max
The IA Core Voltage has impact on the ability to raise the IA Core Max Turbo ratio as well as the BCLK. Additional voltage beyond the default setting will create more heat and should be a consideration for a reduced processor lifetime.
The other main voltage that can affect the ability to overclock is SVID override (Input Voltage below). The default for this voltage is 1.7v ~ 1.8v on the Intel® Desktop Board DZ87KLT-75K. The maximum IVR output voltage (IA Cores, The Ring, and The Graphic) is related to this input voltage. It may be required to raise this input voltage, when you raise the IA Core voltage or BCLK. Make sure the minimum voltage between the IVR output voltage (IA cores, Ring, GT) and this input voltage between 400mv to 450mv. For example: Using LN2, if you increase the IA Core voltage to 1.6v, this input voltage should also increase to 2v.
In Turbo ratio and BCLK OC, the Processor VR fault is set to disable (uncheck). This is a risk of using it by the user because the Over-voltage protection (OVP) and Over-current protection (OCP) will be masked. Reliability of the processor should be concerned by possibly over volting inadvertently. In turbo mode or BCLK OC, the Processor VR efficiency is set to disable (uncheck). It will force IVR to always run in max power delivery capability mode.
Use the option below for BCLK overclocking with PEG/DMI ratio. The PEG/DMI ratio will automatically change when you adjust the BCLK. Notes: To adjust the Manual settings, uncheck Automatic PEG-DMI Ratio. In manual control you can adjust the BCLK by 4% to 5% for upside frequency and you can achieve a larger down frequency range.
There are 3 settings for this voltage: Offset only, Interpolated + Offset and Static + Offset. For Turbo ratio OC, use of the Static + Offset mode is recommended.
When raising BCLK frequency, this Filter PLL should be set to Low Speed mode. This will have the potential to improve the top end frequency that the processor is able to achieve. For Turbo ratio OC it is recommended set Filter PLL to High Speed.
Clock PLL: For Turbo ratio overclocking, set to LC-PLL; For BCLK, set to SB-PLL.
On Ring >: Slide or type to 41 (Ring multiplier can set the same or lower than Core, but not higher than Core). In this example, I set the Ring > lower by 1.