IntelBX80677I57400
IntelBX80684I78700K

4 Cores, 4 Threads @3.0GHz, Kaby Lake.
Release date: Q1 2017.

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

Real World Speed
Performance profile from 607,525 user samples
141,606 User Benchmarks
Best Bench: 80% Base clock 3 GHz, turbo 3.3 GHz (avg)
Worst Bench: 58% Base clock 3 GHz, turbo 3.3 GHz (avg)
Poor: 58% Great: 80%
SPEED RANK: 248th / 1256
Gaming
Gaming 72%
Battleship
Desktop
Desktop 77%
Battleship
Workstation
Workstation 54%
Yacht
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
Effective Speed
Effective CPU Speed
72.5 % 94.4 % Much faster effective speed.
+30%
Memory
Avg. Memory Latency
84.5 Pts 93.6 Pts Lower memory latency.
+11%
1-Core
Avg. Single Core Mixed Speed
97.4 Pts 136 Pts Much faster single-core speed.
+40%
2-Core
Avg. Dual Core Mixed Speed
192 Pts 266 Pts Much faster dual-core speed.
+39%
4-Core
Avg. Quad Core Mixed Speed
350 Pts 512 Pts Much faster quad-core speed.
+46%
8-Core
Avg. Octa Core Mixed Speed
357 Pts 831 Pts Hugely faster octa-core speed.
+133%
Memory
OC Memory Latency
92.4 Pts 97.8 Pts Slightly lower OC memory latency.
+6%
1-Core
OC Single Core Mixed Speed
107 Pts 154 Pts Much faster OC single-core speed.
+44%
2-Core
OC Dual Core Mixed Speed
210 Pts 303 Pts Much faster OC dual-core speed.
+44%
4-Core
OC Quad Core Mixed Speed
398 Pts 597 Pts Much faster OC quad-core speed.
+50%
8-Core
OC Octa Core Mixed Speed
400 Pts 963 Pts Hugely faster OC octa-core speed.
+141%
Market Share
Based on 30,626,775 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.74 % 1.32 % Much higher market share.
+78%
Value
Value For Money
81.4 % 88.6 % Slightly better value.
+9%
User Rating
UBM User Rating
66 % 174 % Hugely more popular.
+164%
Price
Price (score)
$182 Much cheaper.
+48%
$350
Age
Newest
42 Months 33 Months More recent.
+21%
TDP
Thermal Design Power (TDP)
65 Watts Much more energy efficient.
+32%
95 Watts
Cores
CPU Processing Cores
4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
4 threads 12 threads Hugely higher thread count.
+200%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3 GHz 3.7 GHz Faster base frequency.
+23%
Turbo Clock
Turbo Clock Speed
3.5 GHz 4.7 GHz Much faster turbo frequency.
+34%
64-Core
OC Multi Core Mixed Speed
402 Pts 1195 Pts Hugely faster OC 64-core speed.
+197%
64-Core
Avg. Multi Core Mixed Speed
359 Pts 1034 Pts Hugely faster 64-core speed.
+188%
Series
CPU Architecture
Kaby Lake Coffee Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
HD 630 UHD 630
Launch Date
Launch Date
Q1'17 Q4'17
Cache
Cache
6 MB 12 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX2
Recommended Price
Recommended Customer Price
$182.00 N/A
Max Turbo Frequency
Max Turbo Frequency
3.50 GHz 4.70 GHz
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (65W) PCG 2015C (130W)
Memory Types
Memory Types
DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 630 Intel® UHD Graphics 630
Graphics Base Frequency
Graphics Base Frequency
350.00 MHz 350 MHz
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.00 GHz 1.20 GHz
vPro Tech
Intel® vPro™ Technology ‡
No Yes
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
No Yes
PCI Express Configurations
PCI Express Configurations ‡
Up to 1x16, 2x8, 1x8+2x4 Up to 1x16 or 2x8 or 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

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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  • 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.
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