6700K vs 8700k: Intel Core i7 8700K vs i7 6700K: performance comparison

Intel Core i7 8700K vs i7 6700K: performance comparison


Intel Core i7 8700K

Intel Core i7 6700K

We compared two desktop CPUs: the 3.7 GHz Intel Core i7 8700K with 6-cores against the 4.0 GHz i7 6700K with 4-cores. On this page, you’ll find out which processor has better performance in benchmarks, games and other useful information.

  1. Review
  2. Differences
  3. Performance
  4. Specs


General overview and comparison of the processors

Single-Core Performance

Performance in single-threaded apps and benchmarks

Core i7 8700K


Core i7 6700K



Measure performance when all cores are involved

Core i7 8700K


Core i7 6700K


Power Efficiency

The efficiency score of electricity consumption

Core i7 8700K


Core i7 6700K


NanoReview Final Score

Generic CPU rating

Core i7 8700K


Core i7 6700K


Key Differences

What are the key differences between 6700K and 8700K

Advantages of Intel Core i7 8700K

  • Supports up to 128 GB DDR4-2666 RAM
  • Has 2 more physical cores
  • Has 4 MB larger L3 cache size
  • Newer — released 2-years and 2-months later
  • Around 7. 5 GB/s (22%) higher theoretical memory bandwidth
  • 12% higher Turbo Boost frequency (4.7 GHz vs 4.2 GHz)
  • 13% faster in a single-core Geekbench v5 test — 1242 vs 1097 points

Advantages of Intel Core i7 6700K

  • Consumes up to 4% less energy than the Core i7 8700K – 91 vs 95 Watt


Comparing the performance of CPUs in benchmarks

Cinebench R23 (Single-Core)

Core i7 8700K


Core i7 6700K


Cinebench R23 (Multi-Core)

Core i7 8700K


Core i7 6700K


Passmark CPU (Single-Core)

Core i7 8700K


Core i7 6700K


Passmark CPU (Multi-Core)

Core i7 8700K


Core i7 6700K


Geekbench 5 (Single-Core)

Core i7 8700K


Core i7 6700K


Geekbench 5 (Multi-Core)

Core i7 8700K


Core i7 6700K


▶️ Submit your Cinebench R23 result

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Full technical specification of Intel Core i7 8700K and i7 6700K


Vendor Intel Intel
Released October 5, 2017 August 5, 2015
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Coffee Lake Skylake
Model number i7-8700K i7-6700K
Socket LGA-1151 LGA-1151
Integrated GPU UHD Graphics 630 HD Graphics 530


Cores 6 4
Threads 12 8
Base Frequency 3. 7 GHz 4.0 GHz
Turbo Boost Frequency 4.7 GHz 4.2 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 37x 40x
Bus Bandwidth 8 GT/s 8 GT/s
L1 Cache 64K (per core) 64K (per core)
L2 Cache 256K (per core) 256K (per core)
L3 Cache 12MB (shared) 8MB (shared)
Unlocked Multiplier Yes Yes
Transistors 1.75 billions
Fabrication process 14 nm 14 nm
TDP 95 W 91 W
Max. temperature 100°C
Integrated Graphics Intel UHD Graphics 630 Intel HD Graphics 530
GPU Base Clock 350 MHz
GPU Boost Clock 1200 MHz 1150 MHz
Shading Units 192
TMUs 24
ROPs 3
Execution Units 24
TGP 15 W
Max. Resolution 4096×2304 — 60 Hz


Core i7 8700K


Core i7 6700K


Memory support

Memory types DDR4-2666 DDR4-2133, DDR3L-1600
Memory Size 128 GB 64 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 41.6 GB/s 34.1 GB/s
ECC Support No No
Official site Intel Core i7 8700K official page Intel Core i7 6700K official page
PCI Express Version 3.0 3.0
PCI Express Lanes 16 16
Extended instructions SSE4.1, SSE4.2, AVX-2 SSE4.1, SSE4.2, AVX-2

Cast your vote

Choose between two processors

Core i7 8700K

11 (61.1%)

Core i7 6700K

7 (38.9%)

Total votes: 18


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There are many new processors coming out in E4 of this 2020, but many users do not have the budget to get a new AMD Ryzen 9 5950x or Intel Rocket Lake series processor. Intel i7 6700k vs 8700k comparison is the drip into the old and gold of intel processor pool – two mid range processors on which users can still depend on.

i7 6700k Vs 8700k Processor Overview

Intel Core i7 6700k was released on 2015, with 4.0 GHz base clock and 4 dedicated cores. Intel Core i7 8700k came into market 2 years after that, in 2017. The i7 6700k had 3.7 GHz of base clock speed which could be boosted up to 4.7 GHz, consisted of 6 dedicated processor cores. Both were based on 14 nm technology.

Intel i7 6700k Vs 8700k Release Dates

Intel i7 6700k, codename Skylake, was released on Q3 of 2015 with 4 cores and 8 threads. The successor  Intel i7 8700k was released in Q4 of 2017 with 6 cores and 12 threads. But later 6700k was replaced by 7700k and not being made by Intel now. Same happened with 8700k when it was replaced with 9700k from Intel manufacturing.

Intel 6700k Vs 8700k Benchmark Comparisons

In a nutshell, 8700k outperforms 6700k in almost all of the segments if we compare 6700k vs 8700k with same amount of RAM and HDD. The only place where 6700k performs similar to 8700k is the overclocked benchmark. But if we consider 6700k Overclock Vs 8700k then the Intel i7 6700k OC wins by a small margin.


6700k Vs 8700k Gaming Performance

Intel i7 8700k triumphs in the gaming performance due to its greater number of cores and threads than 6700k. Although the overclocked version of 6700k gives similar performance with same VRAM for any game other than the most recent AAA titles or old games with more than medium settings in full HD 1080p graphics resolution.

6700k Vs 8700k 1440p Gaming

Intel i7 6700k comes with inbuilt Intel High Definition Graphics 530 series whereas the Intel i7 8700k comes with Intel Ultra High Definition Graphics 630 series. Without saying, the later one trumps the former. Now 1440p gaming is not possible in any game released after 2019 with the inbuilt graphics for 6700k or 8700k either but many old games in 2015-2017 era runs smooth.

6700k Vs 8700k 4k Gaming

Since both the processors were released before 2018, 4K gaming was not a trend back by that time. But both Intel i7 6700k and Intel i7 8700k supports mid to high budget dedicated graphics cards and 4k gaming is achievable by that. Although games in 4k will not run as smooth as any processor released after 2019 and getting a decent FPS in 4K may be far fetched as well.

6700k OC Vs 8700k Performance Difference

Being released 2 years before 8700k, the Intel i7 6700k is not a good match for 6700k Vs 8700k comparison. But a factory overclocked version of 6700k is completely different than the normal 6700k version, it is more optimized, more tunes and ready to deliver better performance.

6700k Vs 8700k Vs 9700k Comparisons

Intel i7 9700k is the latest from intel release in 2019, this processor is best of lot in the comparison of 6700k Vs 8700k Vs 9700k. Intel i7 9700k replaced the 8700k when it was released and gives a better performance all around. Intel i7 6700k is the lowest of the bunch, currently out of manufacturing by Intel.

6700k Overclock Vs 8700k Speed Comparison

Intel i7 6700k, when overclocked, gives a comparing performance against 8700k. Although both processors have a difference of dedicated cores by 2 and base clock speed by 0.3 GHz, the overclocked version compensates for the difference by boosting up the clock speed from a base frequency of 4.0 GHz to 4.2 GHz.

i7 6700k Vs i7 8700k Price Differences

Since both Intel i7 6700k and 8700k has been stopped by Intel, they are only available at ecommerce sites like Amazon and Ebay. Intel i7 6700k Ebay price is around $280 whereas Intel i7 8700k Ebay price is around $380.

F.A.Q. on 6700k vs 8700k

How good is the Intel Core i7-6700K for gaming?

Intel Core i7-6700K is a budget processor released in 2015, it has Intel High Definition Graphics 530 series, so it will not an ideal processor for gaming. Although along with a dedicated graphics card it will perform quite well.

Is it worth to buy i7 6700k instead of i7 6700?

Intel i7 6700k, when overclocked, can perform better than i7 6700. So if you plan to overclock, it is worth to buy i7 6700k instead of i7 6700.

Does the i7 6700k bottleneck the 1080 Ti?

No, i7 6700k will not bottleneck the 1080 Ti, it will support the system.

Is i7 8700k overkill for gaming?

The Intel i7 8700k was released in 2017, so for today’s AAA titles, it is quite lagging behind.

Is the I7 6700 3.4GHz CPU good for gaming?

Yes the I7 6700 3.4GHz CPU is good for gaming.

What is the best, the Xeon X5670 or Core i7-8700K?

Core i7-8700K is mainstream desktop processor but Xeon X5670 is a server processor, so comparing both will not be appropriate.

Should I buy an i7-8700K and a GTX 1060 (6GB)?

Yes i7-8700K and a GTX 1060 (6GB) is a good combo for a budget level gaming computer.


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Intel Core i7-8700K vs Intel Core i7-6700K

  • Intel Core i7-8700K Processor has 4. 70 GHz Turbo Speed (Intel Core i7-6700K : 4.20 GHz).
  • Intel Core i7-8700K Processor’s Price is comparatively LESS ($303) than Intel Core i7-6700K Processor($339).
  • Intel Core i7-8700K Processor’s has 6 Cores.
  • Intel Core i7-8700K Processor’s has 12 Threads.
  • Intel Core i7-8700K Processor’s Graphics max dinamic Frequency (1.20 GHz) is comparativly better than Intel Core i7-6700K.
  • Intel Core i7-6700K Processor has 4.00 GHz Clock Speed.

Essential Details