IntelBX80662I56400
IntelBX80684I78700K

4 Cores, 4 Threads @2.7GHz, Skylake.
Release date: Q3 2015.

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

Real World Speed
Performance profile from 917,744 user samples
171,457 User Benchmarks
Best Bench: 71% Base clock 2.7 GHz, turbo 3.1 GHz (avg)
Worst Bench: 39% Base clock 2.7 GHz, turbo 0.5 GHz (avg)
Poor: 39% Great: 71%
SPEED RANK: 566th / 1442
Gaming
Gaming 61%
Destroyer
Desktop
Desktop 66%
Battle cruiser
Workstation
Workstation 45%
Yacht
746,287 User Benchmarks
Best Bench: 100% Base clock 3.7 GHz, turbo 5.05 GHz (avg)
Worst Bench: 76% Base clock 3.7 GHz, turbo 0.8 GHz (avg)
Poor: 76% Great: 100%
SPEED RANK: 148th / 1442
Gaming
Gaming 88%
Aircraft carrier
Desktop
Desktop 90%
Nuclear submarine
Workstation
Workstation 80%
Battleship
Effective Speed
Effective CPU Speed
60.8 % 88.4 % Much faster effective speed.
+45%
Memory
Avg. Memory Latency
75.2 Pts 90.1 Pts Lower memory latency.
+20%
1-Core
Avg. Single Core Speed
84.6 Pts 128 Pts Much faster single-core speed.
+51%
2-Core
Avg. Dual Core Speed
166 Pts 249 Pts Much faster dual-core speed.
+50%
4-Core
Avg. Quad Core Speed
267 Pts 466 Pts Much faster quad-core speed.
+75%
8-Core
Avg. Octa Core Speed
286 Pts 770 Pts Hugely faster octa-core speed.
+169%
Memory
OC Memory Latency
86.8 Pts 96.5 Pts Lower OC memory latency.
+11%
1-Core
OC Single Core Speed
96.1 Pts 148 Pts Much faster OC single-core speed.
+54%
2-Core
OC Dual Core Speed
189 Pts 292 Pts Much faster OC dual-core speed.
+54%
4-Core
OC Quad Core Speed
335 Pts 558 Pts Much faster OC quad-core speed.
+67%
8-Core
OC Octa Core Speed
344 Pts 892 Pts Hugely faster OC octa-core speed.
+159%
Market Share
Based on 67,697,035 CPUs tested
Market Share
Market Share (trailing 30 days)
0.35 % 1.48 % Hugely higher market share.
+323%
Value
Value For Money
85.9 % 98.4 % Better value.
+14%
User Rating
UBM User Rating
55 % 81 % Much more popular.
+47%
Price
Price (score)
$79 Much cheaper.
+58%
$188
Age
Newest
103 Months 78 Months More recent.
+24%
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
2.7 GHz 3.7 GHz Much faster base frequency.
+37%
Turbo Clock
Turbo Clock Speed
3.3 GHz 4.7 GHz Much faster turbo frequency.
+42%
64-Core
OC Multi Core Speed
346 Pts 1147 Pts Hugely faster OC 64-core speed.
+232%
64-Core
Avg. Multi Core Speed
288 Pts 971 Pts Hugely faster 64-core speed.
+237%
Series
CPU Architecture
Skylake Coffee Lake
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
$182.00 - $187.00 N/A
Max Turbo Frequency
Max Turbo Frequency
3.3 GHz 4.70 GHz
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
950 MHz 1.20 GHz
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
No Yes
TSX-NI
Intel® TSX-NI
No Yes
vPro Tech
Intel® vPro™ Technology ‡
No Yes
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
No Yes
Trusted Execution Tech
Intel® Trusted Execution 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]

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Processor Rankings (Price vs Performance) April 2024 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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 Frequently Asked Questions

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HDDRAMUSB
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