How To Overclock I7 8700k

Now it is time that you want to increase the Overclock I7 8700k processor. You buy your new Intel i7 or i9 processor and want to upgrade the overclocking system. Why not? You know that the Intel processor is a good one and it is best for your gaming PC. But maybe the default overclocking system does not impress you further. With the Z-series motherboard chipset now it is time to observe the performance of your CPU Intel core processor. So now it is time to increase the default overclocking of your processor.

But basically finding the way is not very difficult rather than using the increased overclocking system. Even the default overclocking system is performing very well with the other features of the processor. And this is safe to perform. With some simple clicks, you can make it the pro-level performer.

Before you want to upgrade your overclocking system, first confirm that every system of your PC is working well or not. Also, check if the system is ready or not for the upgraded overclocking system. Today we are talking about the Coffee Lake Core i7-8700K processor in this article. This is the most latest one that can be used on most modern Intel CPUs and Z-series motherboards from Skylake. Just there need to be some modifications on the CPU with specific values such as voltage or some later CPU features.

If you are upgrading the overclocking system before the build. Then you must focus on cleaning your PC properly. During cleaning just look over the CMOS button or jumper location to make sure that you can reach it and clean it. Some of the newer models come with the easily accessible clear CMOS button on the rear IO panel. And also remember that before the BIOS reboot if the system hangs, then you should need to wait to return to the previous form.

Extra tips here. With an upgrade of your overclocking system, you can also upgrade the cooler at the same time. Maybe you know the Intel K series and X series processors don’t come with a cooler. So for general use, you can buy the $35 Cooler Master Hyper 212 EVO. Or else you can buy Corsair’s H115i Pro or NZXT’s Kraken X62 if you are using the 6-core or 8-core processor. Because those processors come with a liquid cooling closed-loop system that offers a better performing system. It is because the water cooler system is mounted more easily than the air cooler one.

Most of the cooler system comes with an appropriately build a thermal compound. But it is absent on your cooler than you can use the quality type non-conductive heatsink like Arctic MX-4 or Arctic Silver 5.

Now it is time to observe your PC’s performance after completing the upgrading of your cooling system. There are many apps available to check whether your upgraded cooler system gives an extra performance or not. You can use the y-cruncher or Cinebench app for this work. For using y-cruncher you can use the following commands: y-cruncher.exe bench 1b. And collect the total computation time in its. If you see more than 75c on stock then you should need to change your cooling system or need to reapply the thermal paste system. You can also use the HWiNFO64 to measure the CPU temperatures here. On the other hand, Cinebench uses the default system that will use many threads for CPU rendering. Run it as many as you can to get the perfect result.

After you get all the results mentioned above it is time to start your overclocking system.

Overclock I7 8700k

CPU Base Clock & Cpu Multiplier

The clocking system of a CPU can be determined by two things – the Base clock (BCLK) and also the multiplier which is known as the CPU ratio. The multiplier is the multiplication of the base clock that is actually the CPU clock time. For example, 50 * 100MHz = 5.0GHz.

BCLK just is not a system, it will do more things than that just not affect your CPU, it also does more other work. It also influences the DRAM speed, storage, controller, and other integrated components. Initially, the most overclocking system is set to 100MHz. Then for some cases it changes the number for difficult-to-pinpoint system instabilities. It also has the tuning advantage for future exploration, especially when the clock speed on the top. This is established by more stable means and changing the multiplier or ratio.

But on the other side, the multiplier only affects the CPU speed. So it is the perfect one as it is engaged with one thing only. The Intel Core i7 processor from the i7-2600K has plenty of head rooms. It typically can reach 4.5 to 5.1 GHz overclocking speed during a proper cool system. With i7 core and coffee lake, the clock speed is  4.8-5.1 GHz.

First, you need to boot your BIOS setting. It can be done by pressing F2 or Del booting that is depending on the keyboard. By booting the BIOS setting it will change to the default setting. You can set the DRAM speed at 2666 MHz for Coffee Lake’s Z370 chipset which is the default speed. If you want a higher speed than this one then you change the DRAM setting.

If you want the default BIOS setting for further using then you should have written down this. Although most motherboards contain some BIOS profiles. It can allow you to save data on USB sticks.

May be you like : Best Cpu cooler for I7 8700k

The right multiplier

After doing the proper basic clock settings now it is time to find the right multiplier. For that, you need to set the manual voltage around 1.25 volt. It is a good start on the i7-8700K processor. And you should not need to go beyond the maximum of 1.4 voltage for an average to the good liquid cooler. Initially, when you set up your overclocking system, avoid using the adaptive or offset voltage. During the use of the adjusted adaptive system, the stress test should need to be performed. It can cause a voltage spike that is beyond the listed numbers. And that is bad as it can damage your processors or crash the triggers.

If you want to research with the adaptive and offset voltage setting make sure at first you complete the stability testing with a manual voltage. And along with this you complete the determination of the overclock system and save it. There are plenty of additional settings and also with the risk. So, finding the right mix is quite difficult.

Now after the manual setting linked the multiplier with Core, so it can change the affects to all of them. Now it is time to adjust the multiplier. So, first as for Coffee Lake, start with the number 47. And increased the number gradually until there is not any instability in the system. System instability like boot failures, blue screen crashes, or application freeze-ups may occur. So you have to pay attention to these while increasing the number.

Most multipliers changing the chips manage at 4.8GHz and higher. And it is the maximum go to change the 4.9GHz. How far you reach that is the number that is the maximum speed of your chip.

Voltage Raising

The next step is raising the voltage power. And this step needs to be very carefully done. The Coffee Lake default voltage is very low. So it can possibly easily boost to 1.30V or 1.35V. As a result, you can get the additional MHz on your top overclocking system. For example, 1.35V can reach the 5.0 GHz CPU club.

So, it is common that as you increase the voltage the temperature also increases with this. And also the temperature curve is not linear further. Therefore you’re raising your voltage higher than 1.4V then you should start the cooling system. It is highly recommended. As the chip and motherboard have different potential before changing the voltage value you need to test your unique setup. If you see the gonzo overclocking system push your intel voltage over the 1.05V limit. Then you should need to decrease the voltage to 1.4, either it will decrease your processor longevity.

After your clock increases, remember to check the system stability after every clock change. You can do this by using Prime95 and AIDA64. The AIDA64 gives you the combined information of the system, monitoring, synthetic benchmarking, and also stress checking just onto one package.

When do your stress testing, also test the system stability from the tool menu bar. Hit it and select the combination of memory, CPU, FPU, cache to test general stability, and remember to select use FPU test alone for temperature. At the time of AIDA’s FPU test, the processors ran very hotly. So for that, you should take solace that will decrease the full load temperature to a few degrees lower, suitable for your typical use. Consider this as a safety margin.

After you set your overclocking system on stable run your benchmark again and compare the score against the initial scores to observe your gains. Coffee Lake’s 6 or 8 cores and the Z370 or Z390 motherboard VRMs run warmer than their processors. So, there is no need to be alarmed if the idle temperature goes higher than Kaby Lake or Skylake. Under the load, the temperature peak should not be allowed to go over 80°C. If you exceed the 80°C temperature there is a big chance that it will shorten your CPU life due to thermal degradation.

But basically, Intel Coffee Lake CPUs won’t throttle until it is not going around the 90°C-100°C. That reduces the clock speed, thus also reducing the heat. But if you run your system over 90°C then undoubtedly it will be a disaster that can damage your CPU.

Core System or Uncore System

The uncore system of your device takes care of the things that will not be under the CPU core. The system included cache functions and an integrated memory controller. If you’re boosting your uncore system it will increase a little bit of performance. The main benefit you can get by adjusting the uncore system is the reduction of it.

If your CPU does not go after 4.8GHz, decrease your uncore system and watch if then you can go after 4.8GHz or not. If any processor performance is lost with the lower uncore speed, more that this will be returned through higher core clock speeds. If decreasing the uncore can not help you on this process or going bad then just change it to the default.  The uncore system is also the cache or ring ratio on some motherboards and that is depending on the manufacturer.

AVX Setting 

The latest version of Intel comes with an updated AVX instructions series. It is mainly designed to accelerate audio, video, and image processing functions. These instructions greatly increase the power production and heat production by CPU.

Intel introduced the AVX offset BIOS setting to prevent AVX power spikes from limiting general overclocking potential. This feature calculated the extra loads of AVX and adjust the multiplier downward so it can specify the system and maintain stability. So if a system overclocks with the 2 AVX offset it can adjust the 5.0GHz to the 4.5 GHz automatically during the workloads. Also switched back it when everything is completed.

If the applications under AVX instructions are relatively uncommon, then need to check the system stability under load pressure. For AVX testing you can use the y-cruncher. Also, if you have a Skylake-X processor then you can test stability by the things mentioned here. Otherwise if found limitations with these tests then adjust the offset. It will help you to keep the overclocking gains that can be found on the typical CPU workloading without crashing.

For example the i7-8700K can hit 5.0GHz at normal CPU workloads. But the AVX workloads can crash so you need to set that to 1. For Core i9-9900K processor it will also hit 5.0GHz but as it contains two additional CPU cores you need to set the AVX to 2.

The Per Core Overclocking System

Alos another option to increase the CPU overclocking is the Per Core Overclocking system. Every CPU comes with a ‘Hero’ core that can outperform the other system. The discrepancy is also great which can hold the multiplier 1 or 2. This per core overclocking allows a high performing core at a high ratio. This will slightly boost your overclocking system. This alo can run in reverse.

The gain on this is moderwate but it is good to tune a stable overclocking system, and a little bit pushing on your project.

For determination which of the cores work best or worst run all the cores that are already mentioned here. And also use the HWiNFO64 to monitor the temperature. And then get a note of the maximum temperature of every core.


If you want to go beyond the multiplier tweaking system then you can go it via the BCLK or DRAM system. Carefully tunning these things separately from the hardcore.  As the multiplier ratio increases this will result in the more gaining but after a number past the processor does not work properly. Bumping the BCLK allows the core to exploit.

The coffee Lake CPU test guide was not stable in a 51×100 configuration but it was able to run normally by a 50×102 configuration. This will produce the same 5.1GHz but allowed for one not for other. BCLK adjustment in both ways, so for stability you can go lower. For example a 50×99 can work right where 51×100 can not.

Tweaking with BCLK gives you more granular control with the 0.01MHz supported motherboards. But practically there are very little differences on  a 5.0GHz and a 5.05GHz CPU.

For your memory if you enable the XMP profile and leave other settings as auto then it will give you a dirty memory overclock. This overclock optimizes your memory stability and performance. If you ever are in the middle between CPU or the RAM memory then always choose your processor. That is where you always get the benefits.

Shortcuts Satisfaction

Most of the processors including Intel provide some overclocking system that is locked away from BIOS settings. This will allow you tweaking without constantly rebooting on the windows. This will check the stability and performances on every adjustment. This will help your lot of time and also the frustrations.

One step overclock systems with the motherboard or desktop utility are also common which offer the adjustment of overclocking systems. Results from these are mixed and speed wise they all show too much voltage.

If you want to manually increase your overclocking system then go for a motherboard that is especially made for overclocking systems. However you never need liquid nitrogen or high technology utilities to get an increased and satisfactory overclocking system. For i7-8700K processors the overclocking system can possibly be managed with 20-30 percent. The 9th generation CPU or AMD Ryzen processor may not contain that much headroom and the overclocking system going strongly.

Frequently Asked Questions

1.How much can you overclock a i7 8700K?

The Intel Core i7 8700K Coffee Lake-S processor overclocks 3.7GHz base to 4.7GHz boost frequencies. The processor also goes to an overclock speed of 7.4GHz.

2.Is the i7 8700K Overclockable?

Yes, it is. As you read further you already know that we can overclock the i7 8700K processor further by following these articles. But yes sometimes it also comes with the risk that it may damage your CPU. So, you need to carefully maintain the overclocking system.

3.How do I overclock i7 8700K? 

If you already read our article you can know the answer already that how can you increase the overclocking system.

4.Should I overclock my 8700K?

If you are not happy with your overclocking system then you can try increasing the overclocking. But there is always some risk on this procedure. So before your start to boot your processor overclocking system , first check your system stability. And aso make sure that the increased overclocking does not harm you system stability.

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