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Intel Core i7 7700K vs i7 6700K

We compared two 4-core desktop CPUs: the 4.2 GHz Intel Core i7 7700K against the 4 GHz i7 6700K. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.


General overview and comparison of the processors
Single-Core Performance
Performance in single-threaded apps and benchmarks
Measure performance when all cores are involved
Power Efficiency
The efficiency score of electricity consumption
NanoReview Final Score
Generic CPU rating

Key Differences

What are the key differences between 6700K and 7700K
Advantages of Intel Core i7 7700K
  • Newer - released 1-year and 5-months later
  • 7% higher Turbo Boost frequency (4.5 GHz vs 4.2 GHz)
  • Around 1.66 GB/s (5%) higher theoretical memory bandwidth
Advantages of Intel Core i7 6700K
  • Unlocked multiplier


Comparing the performance of CPUs in benchmarks
Cinebench R20 (Single-Core)
Cinebench R20 (Multi-Core)
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)


Full technical specification of Intel Core i7 7700K and i7 6700K
Cores 4 4
Threads 8 8
Base Frequency 4.2 GHz 4 GHz
Turbo Boost Frequency 4.5 GHz 4.2 GHz
Bus frequency 42 MHz 100 MHz
Multiplier 100x 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 8MB (shared) 8MB (shared)
Unlocked Multiplier No Yes
Transistors - 1.75 billions
Fabrication Process 14 nm 14 nm
TDP 91 W 91 W
Max. temperature 100°C -
Memory support
Memory types DDR4-2400, DDR3L-1600 DDR4-2133, DDR3L-1600
Memory Size 64 GB 64 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 35.76 GB/s 34.1 GB/s
ECC Support No No
Vendor Intel Intel
Released January 3, 2017 August 5, 2015
Launch price 350 USD 350 USD
Type Desktop Desktop
Codename Kaby Lake Skylake
Model number i7-7700K i7-6700K
Socket LGA-1151 LGA-1151
Integrated GPU Intel HD Graphics 630 Intel HD Graphics 530
Official site Intel Core i7 7700K official page Intel Core i7 6700K official page
PCI Express Version 3.0 3.0
PCI Express Lanes 16 16
Instruction Set SSE4.1, SSE4.2, AVX-2 SSE4.1, SSE4.2, AVX-2

Cast your vote

Choose between two processors
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2 (100%)
Total votes: 2


So which CPU will you choose: Intel Core i7 6700K or i7 7700K?