IntelBX80677I77700K
IntelBX80684I78700K

4 Cores, 8 Threads @4.2GHz, Kaby Lake.
Release date: Q1 2017.

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About

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

Real World Speed
Performance profile from 604,334 user samples
281,619 User Benchmarks
Best Bench: 99% Base clock 4.2 GHz, turbo 5 GHz (avg)
Worst Bench: 68% Base clock 4.2 GHz, turbo 4.2 GHz (avg)
Poor: 68% Great: 99%
SPEED RANK: 41st / 1184
Gaming
Gaming 83%
Aircraft carrier
Desktop
Desktop 91%
Nuclear submarine
Workstation
Workstation 62%
Destroyer
322,715 User Benchmarks
Best Bench: 107% Base clock 3.7 GHz, turbo 5.15 GHz (avg)
Worst Bench: 76% Base clock 3.7 GHz, turbo 4.3 GHz (avg)
Poor: 76% Great: 107%
SPEED RANK: 14th / 1184
Gaming
Gaming 92%
Nuclear submarine
Desktop
Desktop 95%
Nuclear submarine
Workstation
Workstation 79%
Battleship
Effective Speed
Effective CPU Speed
83 % 92.4 % Slightly faster effective speed.
+11%
1-Core
Avg. Single Core Mixed Speed
136 Pts 137 Pts +1%
2-Core
Avg. Dual Core Mixed Speed
261 Pts 270 Pts +3%
4-Core
Avg. Quad Core Mixed Speed
467 Pts 520 Pts Slightly faster quad-core speed.
+11%
8-Core
Avg. Octa Core Mixed Speed
696 Pts 848 Pts Faster octa-core speed.
+22%
64-Core
Avg. Multi Core Mixed Speed
705 Pts 1065 Pts Much faster 64-core speed.
+51%
1-Core
OC Single Core Mixed Speed
152 Pts 155 Pts +2%
2-Core
OC Dual Core Mixed Speed
297 Pts 308 Pts +4%
4-Core
OC Quad Core Mixed Speed
566 Pts 608 Pts Slightly faster OC quad-core speed.
+7%
8-Core
OC Octa Core Mixed Speed
797 Pts 990 Pts Faster OC octa-core speed.
+24%
64-Core
OC Multi Core Mixed Speed
797 Pts 1220 Pts Much faster OC 64-core speed.
+53%
Market Share
Based on 21,082,764 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.44 % 2.02 % Much higher market share.
+40%
Value
Value For Money
78.5 % 86.4 % Slightly better value.
+10%
User Rating
UBM User Rating
106 % 133 % More popular.
+25%
Price
Price (score)
$340 +4% $355
Age
Newest
33 Months 24 Months More recent.
+27%
TDP
Thermal Design Power (TDP)
91 Watts +4% 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
4.2 GHz Slightly faster base frequency.
+14%
3.7 GHz
Turbo Clock
Turbo Clock Speed
4.5 GHz 4.7 GHz +4%
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
$339.00 - $350.00 N/A
Thermal Solution Specification
Thermal Solution Specification
PCG 2015D (130W) 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
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 Core i7-7700K is Intel’s flagship Kaby Lake based CPU which is reported to have the same IPC as its predecessor, Skylake. Comparing the 7700K and 6700K shows that both average effective speed and peak overclocked speed are up by 7%. Most of the increase in average effective speed is explained by the 5% boost in base clocks from 4.0 to 4.2 GHz. The improved peak lab speed is attributable to a combination of better overclocking capacity and improvements in Intel’s speedshift technology which make the 7700K slightly more responsive. Kaby Lake also has marginally better HD 630 integrated graphics. The i7-7700K is priced similarly to the i7-6700K so for top end gaming and workstation builds, the 7700K is the clear choice for 2017. AMD’s Ryzen will release later this year so things could change at that time. [Jan '17 CPUPro]

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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) October 2019 CPU Rankings.

We calculate effective speed which measures real world performance for typical gamers and desktop users. 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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