IntelBX80684I78700K
IntelBX80677I57600K

6 Cores, 12 Threads @3.7GHz, Coffee Lake.
Release date: Q4 2017.

4 Cores, 4 Threads @3.8GHz, Kaby Lake.
Release date: Q1 2017.

Real World Speed
Performance profile from 601,081 user samples
465,919 User Benchmarks
Best Bench: 104% Base clock 3.7 GHz, turbo 5.15 GHz (avg)
Worst Bench: 84% Base clock 3.7 GHz, turbo 1.45 GHz (avg)
Poor: 84% Great: 104%
SPEED RANK: 23rd / 1256
Gaming
Gaming 94%
Nuclear submarine
Desktop
Desktop 96%
Nuclear submarine
Workstation
Workstation 85%
Aircraft carrier
135,162 User Benchmarks
Best Bench: 95% Base clock 3.8 GHz, turbo 5.15 GHz (avg)
Worst Bench: 65% Base clock 3.8 GHz, turbo 4.45 GHz (avg)
Poor: 65% Great: 95%
SPEED RANK: 95th / 1256
Gaming
Gaming 84%
Aircraft carrier
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
Effective Speed
Effective CPU Speed
94.4 % Faster effective speed.
+12%
84 %
Memory
Avg. Memory Latency
93.6 Pts +5% 89.2 Pts
1-Core
Avg. Single Core Mixed Speed
136 Pts Slightly faster single-core speed.
+10%
124 Pts
2-Core
Avg. Dual Core Mixed Speed
266 Pts Slightly faster dual-core speed.
+9%
245 Pts
4-Core
Avg. Quad Core Mixed Speed
512 Pts Faster quad-core speed.
+13%
453 Pts
8-Core
Avg. Octa Core Mixed Speed
831 Pts Much faster octa-core speed.
+79%
463 Pts
Memory
OC Memory Latency
97.8 Pts +1% 97 Pts
1-Core
OC Single Core Mixed Speed
154 Pts Slightly faster OC single-core speed.
+6%
145 Pts
2-Core
OC Dual Core Mixed Speed
303 Pts Slightly faster OC dual-core speed.
+6%
287 Pts
4-Core
OC Quad Core Mixed Speed
597 Pts Slightly faster OC quad-core speed.
+7%
556 Pts
8-Core
OC Octa Core Mixed Speed
963 Pts Much faster OC octa-core speed.
+74%
554 Pts
Market Share
Based on 30,627,412 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.32 % Hugely higher market share.
+230%
0.4 %
Value
Value For Money
88.6 % +3% 86.3 %
User Rating
UBM User Rating
174 % Much more popular.
+44%
121 %
Price
Price (score)
$350 $251 Cheaper.
+28%
Age
Newest
33 Months More recent.
+21%
42 Months
TDP
Thermal Design Power (TDP)
95 Watts 91 Watts +4%
Cores
CPU Processing Cores
6 cores Much higher core count.
+50%
4 cores
Threads
CPU Processing Threads
12 threads Hugely higher thread count.
+200%
4 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.7 GHz 3.8 GHz +3%
Turbo Clock
Turbo Clock Speed
4.7 GHz Faster turbo frequency.
+12%
4.2 GHz
64-Core
OC Multi Core Mixed Speed
1195 Pts Hugely faster OC 64-core speed.
+116%
553 Pts
64-Core
Avg. Multi Core Mixed Speed
1034 Pts Hugely faster 64-core speed.
+121%
467 Pts
Series
CPU Architecture
Coffee Lake Kaby Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 HD 630
Launch Date
Launch Date
Q4'17 Q1'17
Cache
Cache
12 MB 6 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX 2.0
Recommended Price
Recommended Customer Price
N/A $242.00 - $243.00
Max Turbo Frequency
Max Turbo Frequency
4.70 GHz 4.20 GHz
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (130W) PCG 2015C (65W)
Memory Types
Memory Types
DDR4-2666 DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 630
Graphics Base Frequency
Graphics Base Frequency
350 MHz 350.00 MHz
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.20 GHz 1.15 GHz
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
Yes No
PCI Express Configurations
PCI Express Configurations ‡
Up to 1x16 or 2x8 or 1x8+2x4 Up to 1x16, 2x8, 1x8+2x4

More specs » More specs »
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The i7-8700K is Intel’s latest, top of the range, 8th generation Coffee Lake processor. Like Kaby Lake and Sky Lake before that, Coffee Lake is based on Intel’s 14nm architecture which has been slightly optimized on each iteration. Following AMD’s modus operandi, Intel has upped the cores and threads across the range of their CPUs. In previous generations, a 6-core processor would have been a high-end desk-top (HEDT) processor, however the i7-8700K is the first Intel CPU with 6 cores and 12 threads to be classified (and priced) as a mainstream consumer processor. Specifically, the i7-8700K features a base clock speed of 3.7 GHz which boosts to 4.7 GHz (4.5 GHz for the previous generation i7-7700k), 12MB of smart (L3) cache and 2 channels of DDR4 RAM. The majority of the performance improvements over the 7th generation stem from the higher core count which results in a 50% increase in multi-core speed between the i7-7700k and i7-8700k. A new motherboard will need to be factored into the budget when upgrading to the 8700K as it requires a new Intel Z370 chipset which has supposedly been designed to better deliver power to CPUs with a greater number of cores. Also available in this latest release of CPUs is the 6 core 6 thread i5-8600k which is a more rational option (around $100 cheaper) for the vast majority of users that don’t require hyper-threading. Sandy bridge owners can finally justify an upgrade but with the next iteration of AMD's Zen architecture just around the corner the CPU market will be a lot faster moving now that Intel, once again, has to compete. [Sep '17 CPUPro]

MORE DETAILS

The i5-7600K targets high end gamers, it sits just behind the flagship i7-7700K in Intel’s Kaby Lake lineup. The 7600K will likely be the most popular gaming CPU of 2017 (some competition from AMD’s upcoming Zen/Ryzen CPUs, would be very welcome). Comparing the 7600K and 6600K shows that the two processors are very closely matched and comparing the 7600K vs the hyper-threaded 7700K highlights the relative strength of the 7700K for workstation performance. There are no significant architectural differences between Kaby Lake and Skylake so, when fully overclocked, the two generations should perform similarly but Kaby Lake offers faster base clocks, improved speed shift technology which helps CPU responsiveness, and better integrated graphics[Jan '17 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) July 2020 CPU Rankings.

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top CPUs. [CPUPro]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
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 Frequently Asked Questions

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HDDRAMUSB
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