IntelBX80677I77700
IntelBX80684I78700K

4 Cores, 8 Threads @3.6GHz, Kaby Lake.
Release date: Q1 2017.

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

Real World Speed
Performance profile from 236,075 user samples
61,199 User Benchmarks
Best Bench: 94% Base clock 3.6 GHz, turbo 4 GHz (avg)
Worst Bench: 69% Base clock 3.6 GHz, turbo 0.9 GHz (avg)
Poor: 69% Great: 94%
SPEED RANK: 59th / 1137
Gaming
Gaming 83%
Aircraft carrier
Desktop
Desktop 84%
Aircraft carrier
Workstation
Workstation 62%
Destroyer
174,876 User Benchmarks
Best Bench: 123% Base clock 3.7 GHz, turbo 5 GHz (avg)
Worst Bench: 91% Base clock 3.7 GHz, turbo 1.4 GHz (avg)
Poor: 91% Great: 123%
SPEED RANK: 13th / 1137
Gaming
Gaming 107%
UFO
Desktop
Desktop 105%
UFO
Workstation
Workstation 95%
Nuclear submarine
Effective Speed
Effective CPU Speed
82.7 % 107 % Faster effective speed.
+30%
SC Mixed
Avg. Single Core Mixed Speed
117 Pts 137 Pts Faster single-core speed.
+17%
QC Mixed
Avg. Quad Core Mixed Speed
403 Pts 520 Pts Faster quad-core speed.
+29%
MC Mixed
Avg. Multi Core Mixed Speed
633 Pts 1078 Pts Much faster multi-core speed.
+70%
SC Mixed
OC Single Core Mixed Speed
127 Pts 155 Pts Faster OC single-core speed.
+22%
QC Mixed
OC Quad Core Mixed Speed
479 Pts 609 Pts Faster OC quad-core speed.
+27%
MC Mixed
OC Multi Core Mixed Speed
674 Pts 1233 Pts Hugely faster OC multi-core speed.
+83%
Market Share
Based on 12,078,647 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.89 % 3.65 % Hugely higher market share.
+310%
Value
Value For Money
84.2 % 99.2 % Better value.
+18%
User Rating
UBM User Rating
67 % 155 % Hugely more popular.
+131%
Price
Price (score)
$278 Cheaper.
+23%
$359
Age
Newest
22 Months 13 Months Much more recent.
+41%
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
8 threads 12 threads Much higher thread count.
+50%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.6 GHz 3.7 GHz +3%
Turbo Clock
Turbo Clock Speed
4.2 GHz 4.7 GHz Slightly faster turbo frequency.
+12%
SC Int
Single Core Integer Speed
124 Pts 151 Pts Faster single-core int speed.
+22%
SC Float
Single Core Floating Point Speed
132 Pts 159 Pts Faster single-core fp speed.
+20%
QC Int
Quad Core Integer Speed
461 Pts 596 Pts Faster quad-core int speed.
+29%
QC Float
Quad Core Floating Point Speed
497 Pts 630 Pts Faster quad-core fp speed.
+27%
MC Int
Multi Core Integer Speed
621 Pts 1135 Pts Hugely faster multi-core int speed.
+83%
MC Float
Multi Core Floating Point Speed
709 Pts 1316 Pts Hugely faster multi-core fp speed.
+86%
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
8 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
$303.00 - $312.00 N/A
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
1.15 GHz 1.20 GHz
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) November 2018 CPU Rankings.

We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by current prices to yield a value for money rating which is geared towards gamers. 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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CPUGPUSSD
Intel Core i7-8700K $359Nvidia GTX 1070 $330Samsung 850 Evo 250GB $85
AMD Ryzen 5 1600 $130Nvidia GTX 1060-6GB $243Samsung 850 Evo 500GB $105
Intel Core i5-8600K $237AMD RX 480 $280Samsung 850 Pro 256GB $100
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $130SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $12
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