IntelBX80684I78700K
IntelBX80662I76700

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

4 Cores, 8 Threads
@3.4GHz Skylake (2015)

Real World Speed
Performance profile from 152,817 user samples
86,077 User Benchmarks
Best Bench: 127% Base clock 3.7 GHz, turbo 5.15 GHz (avg)
Worst Bench: 95% Base clock 3.7 GHz, turbo 0.8 GHz (avg)
Poor: 95% Great: 127%
SPEED RANK: 7th / 1110
Gaming
Gaming 111%
UFO
Desktop
Desktop 107%
UFO
Workstation
Workstation 97%
Nuclear submarine
66,740 User Benchmarks
Best Bench: 89% Base clock 2.5 GHz, turbo 3.4 GHz (avg)
Worst Bench: 68% Base clock 3.4 GHz, turbo 0.8 GHz (avg)
Poor: 68% Great: 89%
SPEED RANK: 66th / 1110
Gaming
Gaming 79%
Battleship
Desktop
Desktop 79%
Battleship
Workstation
Workstation 59%
Gunboat
Effective Speed
Effective CPU Speed
111 % Much faster effective speed.
+40%
78.9 %
SC Mixed
Avg. Single Core Mixed Speed
140 Pts Faster single-core speed.
+27%
110 Pts
QC Mixed
Avg. Quad Core Mixed Speed
539 Pts Much faster quad-core speed.
+39%
387 Pts
MC Mixed
Avg. Multi Core Mixed Speed
1094 Pts Hugely faster multi-core speed.
+84%
595 Pts
SC Mixed
OC Single Core Mixed Speed
157 Pts Faster OC single-core speed.
+28%
123 Pts
QC Mixed
OC Quad Core Mixed Speed
625 Pts Much faster OC quad-core speed.
+37%
455 Pts
MC Mixed
OC Multi Core Mixed Speed
1265 Pts Hugely faster OC multi-core speed.
+101%
629 Pts
Market Share
Based on 9,306,477 CPUs tested.
Market Share
Market Share (trailing 30 days)
3.38 % Hugely higher market share.
+289%
0.87 %
Value
Value For Money
104 % Much better value.
+34%
78.1 %
User Rating
UBM User Rating
138 % Hugely more popular.
+138%
58 %
Price
Price (score)
$340 $299 Slightly cheaper.
+12%
Age
Newest
8 Months Much more recent.
+76%
33 Months
TDP
Thermal Design Power (TDP)
95 Watts 65 Watts Much more energy efficient.
+32%
Cores
CPU Processing Cores
6 cores Much higher core count.
+50%
4 cores
Threads
CPU Processing Threads
12 threads Much higher thread count.
+50%
8 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.7 GHz Slightly faster base frequency.
+9%
3.4 GHz
Turbo Clock
Turbo Clock Speed
4.7 GHz Faster turbo frequency.
+17%
4 GHz
SC Int
Single Core Integer Speed
155 Pts Faster single-core int speed.
+29%
120 Pts
SC Float
Single Core Floating Point Speed
160 Pts Faster single-core fp speed.
+27%
126 Pts
QC Int
Quad Core Integer Speed
614 Pts Much faster quad-core int speed.
+37%
447 Pts
QC Float
Quad Core Floating Point Speed
638 Pts Much faster quad-core fp speed.
+37%
466 Pts
MC Int
Multi Core Integer Speed
1167 Pts Hugely faster multi-core int speed.
+101%
580 Pts
MC Float
Multi Core Floating Point Speed
1335 Pts Hugely faster multi-core fp speed.
+102%
660 Pts
Series
CPU Architecture
Coffee Lake (2017) Skylake (2015)
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 HD 530
Launch Date
Launch Date
Q4'17 Q3'15
Cache
Cache
12 MB 8 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX 2.0
Embedded Options Available
Embedded Options Available
No Yes
Recommended Price
Recommended Customer Price
N/A $303.00 - $312.00
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (130W) PCG 2015C (65W)
Memory Types
Memory Types
DDR4-2666 DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 530
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.20 GHz 1.15 GHz
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

Processor Rankings (Price vs Performance) June 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.
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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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How it works

  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
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  • - 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.
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  • - Find the best upgrades.
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 Frequently Asked Questions

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CPUGPUSSD
AMD Ryzen 5 1600 $175Nvidia GTX 1070 $447Samsung 850 Evo 250GB $104
Intel Core i7-8700K $340Nvidia GTX 1060-6GB $270Samsung 850 Evo 500GB $117
Intel Core i5-8600K $239AMD RX 480 $280Samsung 850 Pro 256GB $116
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $177SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $911SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $58HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Ultra Fit 32GB $12
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