X79 Rampage IV Extreme (Black Edition)


ASUS X79 Rampage IV Extreme (Black Edition) OC-Guide

This guide is an example how to overclock your CPU using an ASUS X79 Rampage IV Extreme motherboard. Since the normal Rampage IV Extreme and the Black Edition only differ in some features and the design you can use this guide for both mainboards.

This example was done using a i7-4930K CPU. You can apply the same settings if you use any other K-Suffix and X-Suffic CPU such as i7-4820K and i7-4960X.


  • ASUS Rampage IV Extreme
  • Intel Core i7-4930K
  • 4 x 4 GB DDR3 2667 C10
  • Phanteks PH-TC14PC CPU cooler
  • Sea Sonic Platinum Series 1200 W


  • Windows 7 x64 Service Pack 1
  • ASUS TurboV Core
  • CPU-Z
  • Core Temp
  • Prime95

You can download the required software here:

CPU-Z 1.71 Setup EN
1.50 MB | 2593 downloads
CoreTemp 1.0 RC6
717.26 KB | 11927 downloads
Prime 95 v28.5 64-Bit
15.39 MB | 36737 downloads
Prime 95 v28.5 32-Bit
4.13 MB | 1447 downloads
TurboV Core for X79
8.35 MB | 1383 downloads
MemTweakIt for X79
1.21 MB | 826 downloads

OC-Guide for overclocking at 4500 MHz Step by Step:



BIOS screenshots for advanced overclocking of 4500 MHz:

20150120181600 20150120181608 20150120181620 20150120192039

20150120192048 20150120192057 20150120192113



Please keep in mind that the voltages for your CPU might differ from this example. If your CPU core is not stable at these settings and you don’t exceed 85 °C core temperature, try to raise the CPU core voltage. Otherwise lower the CPU multi.


Important BIOS Settings explained:

CPU Strap

The CPU strap (or BCLK Strap) is an additional multiplier to increase the base clock. Stock is x1 but if you e.g. selext x1.25, the BCLK will have an eventual value of 125 MHz.


PLL Selection

LC PLL works best for low/stock clock BCLK of 100 MHz. LC PLL is and inductor capacitor based oscillator for low noise but only for a low range. If you overclock the BCLK, change to SB PLL or simply leave on auto.


Filter PLL

This is only needed for very high BCLK of over ~167 MHz. Just leave this setting on auto.


BCLK Frequency

The Base CLocK of your system. This frequency is tied to the PCIe clock and the DMI bus. High frequencies can cause your system to be unstable. Use the BCLK/CPU Strap for high BCLKs. Raising the BCLK will also raise the CPU core, ring and RAM frequency.


CPU Core Ratio

You can choose whether you want all cores to be clocked at the same level (Sync all cores) or clock them separately (per core). I recommend to sync all cores to get the maximum performance.


1-Core Ratio Limit

This setting will change the CPU multiplier of your system. If you run a BCLK of 100 MHz and select 37 here, your CPU will run at 3700 MHz core frequency.


Min. CPU Cache Ratio

This will set the minimum CPU cache/ring ratio. If you run a BCLK of 100 MHz and select 35 here, your CPU cache/ring will run at 3500 MHz. I recommend to use the same as Max. CPU Cache Ratio here.


Max. CPU Cache Ratio

This will set the maximum CPU cache/ring ratio. If you run a BCLK of 100 MHz and select 35 here, your CPU cache/ring will run at 3500 MHz. I recommend to use the same as Min. CPU Cache Ratio here.


Internal PLL Overvoltage

This can improve the overclock-ability of some CPUs. I recommend to set this to enabled.


BCLK Frequency : DRAM Frequency

This is an additional divider to achieve higher memory clocks on the RAM. I recommend to use 100 : 100 since 100 : 133 can be bugged on some systems.


DRAM Frequency

The DRAM Frequency is the result of the BCLK and an additional multiplier. E.g. 100 MHz BCLK and 18.66 multi will result in 1866 MHz RAM frequency. Higher than 2933 MHz usually doesn’t work. If you want to achieve higher memory frequencies, you have to use a different BCLK strap.


Xtreme Tweaking

This can improve the performance in some benchmarks such as 3DMark2001 and SuperPi. Disable for 24/7 systems.


CPU Level Up

Automated overclocking. I recommend to not use this feature.


EPU Power Saving Mode

Configures the system for power savings – leave this setting disabled for overclocking.


CPU Core Voltage

This is the core voltage of your CPU. Increase this voltage if you want to achieve higher core clocks. Usually more than 1,35 Volt is not recommended for daily use.


CPU Graphics Voltage

The GPU Graphics Voltage is tied to the internal graphics processor (HD 4600 for 4770K). Only change this if you use the internal graphics processor and if you want to overclock it.


CPU System Agent Voltage (VCCSA)

This voltage is important to run high memory clocks. Stock is 0.85 Volt and usually you don’t need more than 1.00 Volt for 24/7 systems.


CPU VTT Voltage

This voltage also helps for memory overclocking.


SVID Support

Enables or disables the SVID bus between the controller and the processor. When pushing BCLK, the SVID Clock rises accordingly and thus disabling when overclocking is best.


DRAM Voltage

The DRAM Voltage is the Voltage of your memory. Check the memory modules for the specified voltage. Most are between 1.35 and 1.5 Volt. The official limit according to Intel is 1.5 Volt, however 1.65 Volt modules are no problem at all according to my testing.


PCH Core Voltage

This is the chipset voltage and doesn’t have to be changed since it doesn’t help in any way.


PCH VLX Voltage

This voltage can help overclocking the BCLK. Lower for high BCLK and increase for low BCLK.


VTTDDR Voltage

This voltage always has to be 50% of the DRAM voltage. So if you use 1.5 DRAM Voltage, this one has to be at 0.75 Volt. Simply leave VTTDDR Voltage on auto because all boards apply the correct value automatically.


CPU Spread Spectrum

The spread spectrum reduces signal spikes. However it will leade to a worse overclocking so always disable this setting.


BCLK Recovery

If you adjust the BCLK in windows e.g. with TurboV Core and restart, the BCLK Recovery will reset the BCLK to the boot value fixed in the BIOS if enabled. If you ignore this, the same BCLK will be applied after a reset like you set in windows by software.


Maximus Tweak

Maximus Tweak 1 can help to increase the performance and Maximus Tweak 2 can help to increase the overclocking. I recommend to use 2.


Enhanced Intel SpeedStep Technology

Intel SpeedStep will downclock your CPU in idle to save energy. I recommend to disable this feature because you only save about 2-5 W, but it can cause your system to be unstable when overclocking.


Turbo Mode

Leave this setting enabled using ASUS motherboards. Otherwise you will not be able to increase your CPU multiplier.


CPU C-States

The C-States are another energy saving option which I recommend to disable for maximum overclocking.


Leave a Reply

Your email address will not be published. Required fields are marked *