IntelBX80662I56600K
IntelBX80677I77700K

4 Cores, 4 Threads
@3.5GHz Skylake (2015)

4 Cores, 8 Threads
@4.2GHz Kaby Lake (2017)

Real World Speed
Performance profile from 262,203 user samples
106,155 User Benchmarks
Best Bench: 107% Base clock 3.5 GHz, turbo 4.8 GHz (avg)
Worst Bench: 68% Base clock 3.5 GHz, turbo 0.75 GHz (avg)
Poor: 68% Great: 107%
SPEED RANK: 39th / 1100
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 54%
Yacht
156,048 User Benchmarks
Best Bench: 113% Base clock 4.2 GHz, turbo 5 GHz (avg)
Worst Bench: 87% Base clock 4.2 GHz, turbo 1.7 GHz (avg)
Poor: 87% Great: 113%
SPEED RANK: 18th / 1100
Gaming
Gaming 100%
Nuclear submarine
Desktop
Desktop 100%
UFO
Workstation
Workstation 73%
Battleship
Effective Speed
Effective CPU Speed
88.7 % 99.7 % Slightly faster effective speed.
+12%
SC Mixed
Avg. Single Core Mixed Speed
122 Pts 140 Pts Slightly faster single-core speed.
+15%
QC Mixed
Avg. Quad Core Mixed Speed
460 Pts 489 Pts Slightly faster quad-core speed.
+6%
MC Mixed
Avg. Multi Core Mixed Speed
471 Pts 741 Pts Much faster multi-core speed.
+57%
SC Mixed
OC Single Core Mixed Speed
145 Pts 155 Pts Slightly faster OC single-core speed.
+7%
QC Mixed
OC Quad Core Mixed Speed
561 Pts 566 Pts +1%
MC Mixed
OC Multi Core Mixed Speed
567 Pts 826 Pts Much faster OC multi-core speed.
+46%
Market Share
Based on 8,459,024 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.16 % 2.53 % Hugely higher market share.
+118%
Value
Value For Money
98.3 % 99.9 % +2%
User Rating
UBM User Rating
87 % 134 % Much more popular.
+54%
Price
Price (score)
$222 Cheaper.
+23%
$290
Age
Newest
32 Months 15 Months Much more recent.
+53%
TDP
Thermal Design Power (TDP)
91 Watts 91 Watts
Cores
CPU Processing Cores
4 cores 4 cores
Threads
CPU Processing Threads
4 threads 8 threads Hugely higher thread count.
+100%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.5 GHz 4.2 GHz Faster base frequency.
+20%
Turbo Clock
Turbo Clock Speed
3.9 GHz 4.5 GHz Faster turbo frequency.
+15%
SC Int
Single Core Integer Speed
141 Pts 152 Pts Slightly faster single-core int speed.
+8%
SC Float
Single Core Floating Point Speed
149 Pts 159 Pts Slightly faster single-core fp speed.
+7%
QC Int
Quad Core Integer Speed
549 Pts +0% 548 Pts
QC Float
Quad Core Floating Point Speed
587 Pts +1% 581 Pts
MC Int
Multi Core Integer Speed
550 Pts 761 Pts Much faster multi-core int speed.
+38%
MC Float
Multi Core Floating Point Speed
590 Pts 873 Pts Much faster multi-core fp speed.
+48%
Series
CPU Architecture
Skylake (2015) Kaby Lake (2017)
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
HD 530 HD 630
Launch Date
Launch Date
Q3'15 Q1'17
Cache
Cache
6 MB SmartCache 8 MB
Recommended Price
Recommended Customer Price
$242.00 - $243.00 $339.00 - $350.00
Memory Types
Memory Types
DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 530 Intel® HD Graphics 630
Graphics Base Frequency
Graphics Base Frequency
350 MHz 350.00 MHz
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
No Yes

More specs » More specs »
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The Intel Core i5-6600K is based on the new "Skylake" 14nm manufacturing process. Sporting 4 physical cores with base/turbo clocks of 3.5/3.9 GHz the 6600K and its predecessor, the 4690K share the same basic configuration and disappointingly, offer similar performance. Comparing the 6600K and 6700K shows that the 6700K has faster multi and single core performance. The improved multi core performance is due to Hyperthreading which is the key differentiator for the i7-6700K. The gap in single core performance can largely be eliminated by overclocking the i5-6600K so although the stock effective speed is significantly higher on the 6700K, this gap diminishes significantly when both processors are overclocked. At a 30% discount, the 6600K is the better value gaming CPU. [Aug '15 CPUPro]

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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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Processor Rankings (Price vs Performance) April 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 $447Samsung 850 Evo 250GB $90
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $300Samsung 850 Evo 500GB $137
AMD Ryzen 5 1600 $176AMD RX 480 $350Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $183SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $957SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $193SanDisk Ultra Fit 32GB $12
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