ASRock Z170 Non-K Overclocking Guide

In this quick guide I will explain the process of ASRock Z170 Non-K Overclocking. The non-K OC is really easy and can be done within few minutes. Few days ago I published a short article about overclocking non-K CPUs. Depending on the CPU you can increase the clock between 15-70 % without any problems.


Unlike K-CPUs which can be overclocked using the multiplier, non-K CPUs have to be overclocked using the BCLK. Pre-Skylake CPUs such as Haswell or Devils Canyon could only be overclocked by about 3-5% using the BCLK because the BCLK was still tied to the DMI and the PCIe.

slide-3However, for Skylake CPUs, BCLK and PCIe have a dedicated reference clock which always stays at 100 MHz – no matter how you change the BCLK. In other words: You can push the BCLK without worrying about other components.

The non-K BIOS is skipping some parts of the power-management, so there are few things you have to keep in mind:

  • The missing power-management will not allow to read out any core temperature. However, you can read-out the package temperature with the tool HWInfo (make sure to stay below 70°C package temperature)
  • HWiNFO
    0.00 KB | 26419 downloads
  • No C-States. CPUs will always run full speed and full voltage.
  • No Turbo-Mode.
  • No iGPU.
  • Intel AVX is screwed. Some benchmarks like Intel XTU use AVX and you will have about 4-5 times lower score. As far as I know no game is using AVX so it’s no problem to use this for gaming rigs. Not suitable for professional usage tho.
  • Avoid high memory clocks. Everything around 2600 MHz will be fine.

For 24/7 overclocking and gaming you don’t have to worry about any of these points. Pentium, i3 and i5 CPUs have a low power consumption which results in a low core temperature for 24/7. As long as follow my guide you don’t have to worry about the missing core-temperature readout.

Compatible CPUs for non-K OC:

CPU NameCoresStock ClockTurbo ClockHyperthreadingL3-CacheTDPAmazon
Pentium G440023300 MHz-No3 MB54 Wlink
Pentium G4400T22900 MHz-No3 MB35 W
Pentium G450023500 MHz-No3 MB51 Wlink
Pentium G4500T23000 MHz-No3 MB35 Wlink
Pentium G452023600 MHz-No3 MB51 Wlink
Core i3-6098P23600 MHzYes3MB54 Wlink
Core i3-610023700 MHz-Yes3 MB51 Wlink
Core i3-6100T23200 MHzYes3 MB35 Wlink
Core i3-630023800 MHz-Yes4 MB51 Wlink
Core i3-6300T23300 MHz-Yes4 MB35 Wlink
Core i3-632023900 MHz-Yes4 MB51 Wlink
Core i5-640042700 MHz3300 MHzNo6 MB65 Wlink
Core i5-6400T42200 MHz2800 MHzNo6 MB35 Wlink
Core i5-6402P42800 MHz3400 MHzNo6 MB65 Wlink
Core i5-650043200 MHz3600 MHzNo6 MB65 Wlink
Core i5-6500T42500 MHz3100 MHzNo6 MB35 Wlink
Core i5-660043500 MHz3900 MHzNo6 MB65 Wlink
Core i5-6600T42700 MHz3500 MHzNo6 MB35 Wlink
Core i7-670043400 MHz4000 MHzYes8 MB65 Wlink
Core i7-6700T42800 MHz3600 MHzYes8 MB35 Wlink

Depending on your budget you should only consider these CPUs:

All of the CPUs should easily reach 4400-4500 MHz and a high multiplier is not needed because you can compensate everything with the BCLK.

ASRock Z170 Non-K Overclocking BIOS

First of all get the correct BIOS for your board. You can find a list of BIOSes in the table below.

After downloading, enter the BIOS and use Instant Flash to update to the Non-K Version:

ASRock Z170 Non-K Overclocking BIOS Flash

ASRock Non-K Overclocking Motherboards and BIOSes

In the table below you can find the ASRock motherboards that support Non-K overclocking using the BIOSes listed below. For more information on how to overclock the Skylake Non-K CPUs using ASRock motherboards, check out the Detailed ASRock Z170 Non-K OC Guide.
MotherboardBIOS DownloadAmazon
Z170 OC FormulaLink
Z170 Gaming K6+
ASRock Z170 Gaming K6+ Non-K OC BIOS
7.23 MB | 1191 downloads
Z170 Gaming K6
ASRock Z170 Gaming K6 Non-K OC BIOS
7.23 MB | 2162 downloads
Z170 Gaming K4
ASRock Z170 Gaming K4 Non-K OC BIOS
7.19 MB | 5017 downloads
Z170 Extreme7+
ASRock Z170 Extreme7+ Non-K OC BIOS
7.60 MB | 1145 downloads
Z170 Extreme6+
ASRock Z170 Extreme6+ Non-K OC BIOS
7.52 MB | 4201 downloads
Z170 Extreme6
ASRock Z170 Extreme6 Non-K OC BIOS
7.52 MB | 1747 downloads
Z170 Extreme4
ASRock Z170 Extreme4 Non-K OC BIOS
7.63 MB | 5347 downloads
Z170 Extreme4+Link
Z170 Extreme3
ASRock Z170 Extreme3 Non-K OC BIOS
7.65 MB | 7283 downloads
Z170 Gaming K4/D3
ASRock Z170 Gaming K4D3 Non-K OC BIOS
7.19 MB | 1453 downloads
Z170 Gaming-ITX/AC
ASRock Z170 Gaming-ITXac Non-K OC BIOS
7.24 MB | 1887 downloads
Z170 Pro4S
ASRock Z170 Pro4S Non-K OC BIOS
7.48 MB | 6588 downloads
Z170 Pro4/D3
ASRock Z170 Pro4D3 Non-K OC BIOS
7.41 MB | 2267 downloads
Z170 Pro4
ASRock Z170 Pro4 Non-K OC BIOS
7.47 MB | 10941 downloads
ASRock Z170A-X13.1 Non-K OC BIOS
7.53 MB | 2560 downloads
Z170M Extreme4
ASRock Z170M Extreme4 Non-K OC BIOS
7.47 MB | 1950 downloads
ASRock Z170M-ITXac Non-K OC BIOS
7.52 MB | 1776 downloads


ASRock Z170 Non-K Overclocking Overclocking

My setup:

ASRock Z170 Non-K Overclocking System

The CPU clock is a result of the BCLK x Multi. E.g. the i3-6100 has a stock clock of 3700 MHz (100×37). For example a BCLK of 120 will result in a core clock of 4440 MHz.

You basically have to change 3 main values to overclock: CPU BCLK, CPU Multi (Ratio) and CPU Core Voltage. While you can always use around 1,325 Volt as CPU Core Voltage, the CPU Multi and BCLK depend on the exact CPU.

Using the ASRock Non-K BIOS, the CPU will always be at the maximum multiplier. This means you only have to change the BCLK, Core Voltage and keep the memory at the correct speed.

CPU NameCPU + Ring MultiBCLK for 4500 MHZ
Pentium G440033137
Core i3-610037122
Core i3-630038119
Core i5-640027167
Core i7-670034133

Make sure you have a sufficient CPU cooler. Don’t try this with the Intel Boxed cooler.

ASRock Z170 Non-K Overclocking in 8 steps

BCLK depends on the CPU. Check values in the table above.

  • Enter the BIOS
  • Go to OC Tweaker – CPU Configuration
  • Set the BCLK you need (in my case 122)
  • Go to OC Tweaker – Voltage Configuration
  • Set the CPU Core Voltage to 1.325 and the the CPU Loadline Calibration to Level 1
  • Go to OC Tweaker – DRAM Configuration
  • Load the XMP Profile
  • Adjust the DRAM Frequency to a value around 2600 MHz

If you have any questions, don’t hesitate to ask in the forums:

Overclocking.Guide Forums

BIOS Screenshots:

ASRock Z170 Non-K Overclocking BIOS ASRock Z170 Non-K Overclocking BIOS ASRock Z170 Non-K Overclocking BIOS

Now boot into windows and test the stability with Prime95 1344K for at least one hour. For a detailed Prime95 Guide check HERE

These settings should work for almost all boards and CPUs. If you have problems just let me know in the comments.