IntelBX80662I56600
IntelBX80684I78700K

4 Cores, 4 Threads
@3.3GHz Skylake (2015)

6 Cores, 12 Threads
@3.7GHz Coffee Lake (2017)

Real World Speed
Performance profile from 57,270 user samples
23,597 User Benchmarks
Best Bench: 87% Base clock 3.3 GHz
Worst Bench: 61% Base clock 3.3 GHz, turbo 0.55 GHz (avg)
Poor: 61% Great: 87%
SPEED RANK: 54th / 985
Gaming
Gaming 79%
Battleship
Desktop
Desktop 77%
Battleship
Workstation
Workstation 48%
Yacht
33,673 User Benchmarks
Best Bench: 126% Base clock 3.7 GHz, turbo 5 GHz (avg)
Worst Bench: 95% Base clock 3.7 GHz, turbo 1.75 GHz (avg)
Poor: 95% Great: 126%
SPEED RANK: 6th / 985
Gaming
Gaming 111%
UFO
Desktop
Desktop 108%
UFO
Workstation
Workstation 97%
Nuclear submarine
Effective Speed
Effective CPU Speed
78.8 % 111 % Much faster effective speed.
+41%
SC Mixed
Avg. Single Core Mixed Speed
108 Pts 141 Pts Much faster single-core speed.
+31%
QC Mixed
Avg. Quad Core Mixed Speed
409 Pts 539 Pts Much faster quad-core speed.
+32%
MC Mixed
Avg. Multi Core Mixed Speed
420 Pts 1101 Pts Hugely faster multi-core speed.
+162%
SC Mixed
OC Single Core Mixed Speed
121 Pts 157 Pts Faster OC single-core speed.
+30%
QC Mixed
OC Quad Core Mixed Speed
453 Pts 620 Pts Much faster OC quad-core speed.
+37%
MC Mixed
OC Multi Core Mixed Speed
457 Pts 1262 Pts Hugely faster OC multi-core speed.
+176%
Market Share
Based on 7,461,238 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.33 % 2.89 % Hugely higher market share.
+776%
Value
Value For Money
90.1 % 106 % Better value.
+17%
User Rating
UBM User Rating
74 % 140 % Hugely more popular.
+89%
Price
Price (score)
$204 Much cheaper.
+38%
$330
Age
Newest
29 Months 4 Months Hugely more recent.
+86%
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
3.3 GHz 3.7 GHz Slightly faster base frequency.
+12%
Turbo Clock
Turbo Clock Speed
3.9 GHz 4.7 GHz Faster turbo frequency.
+21%
SC Int
Single Core Integer Speed
117 Pts 154 Pts Much faster single-core int speed.
+32%
SC Float
Single Core Floating Point Speed
124 Pts 160 Pts Faster single-core fp speed.
+29%
QC Int
Quad Core Integer Speed
442 Pts 608 Pts Much faster quad-core int speed.
+38%
QC Float
Quad Core Floating Point Speed
468 Pts 636 Pts Much faster quad-core fp speed.
+36%
MC Int
Multi Core Integer Speed
443 Pts 1162 Pts Hugely faster multi-core int speed.
+162%
MC Float
Multi Core Floating Point Speed
469 Pts 1331 Pts Hugely faster multi-core fp speed.
+184%
Series
CPU Architecture
Skylake (2015) Coffee Lake (2017)
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
HD 530 UHD 630
Launch Date
Launch Date
Q3'15 Q4'17
Cache
Cache
6 MB SmartCache 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
$213.00 - $224.00 N/A
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (65W) PCG 2015C (130W)
Memory Types
Memory Types
DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 530 Intel® UHD Graphics 630
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.15 GHz 1.20 GHz
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
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) February 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.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance and price.
How Fast Is Your CPU? (Bench your build) Size up your PC in less than a minute.

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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How it works

  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

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CPUGPUSSD
Intel Core i7-8700K $330Nvidia GTX 1070 $430Samsung 850 Evo 250GB $88
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $285Samsung 850 Evo 500GB $149
AMD Ryzen 5 1600 $170AMD RX 480 $400Samsung 850 Pro 256GB $125
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $185SanDisk Extreme 64GB $50
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $975SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $206SanDisk Extreme 16GB $18
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