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

4 Cores, 8 Threads
@3.4GHz Sandy Bridge (2011)

Real World Speed
Performance profile from 84,794 user samples
46,503 User Benchmarks
Best Bench: 127% Base clock 3.7 GHz, turbo 5.15 GHz (avg)
Worst Bench: 93% Base clock 3.7 GHz
Poor: 93% Great: 127%
SPEED RANK: 5th / 1052
Gaming 110%
Desktop 107%
Workstation 97%
Nuclear submarine
38,291 User Benchmarks
Best Bench: 89% Base clock 3.4 GHz, turbo 5 GHz (avg)
Worst Bench: 55% Base clock 3.4 GHz, turbo 1.1 GHz (avg)
Poor: 55% Great: 89%
SPEED RANK: 107th / 1052
Gaming 71%
Desktop 72%
Workstation 51%
Effective Speed
Effective CPU Speed
110 % Much faster effective speed.
71 %
SC Mixed
Avg. Single Core Mixed Speed
140 Pts Much faster single-core speed.
101 Pts
QC Mixed
Avg. Quad Core Mixed Speed
537 Pts Much faster quad-core speed.
348 Pts
MC Mixed
Avg. Multi Core Mixed Speed
1104 Pts Hugely faster multi-core speed.
511 Pts
SC Mixed
OC Single Core Mixed Speed
158 Pts Faster OC single-core speed.
122 Pts
QC Mixed
OC Quad Core Mixed Speed
624 Pts Much faster OC quad-core speed.
451 Pts
MC Mixed
OC Multi Core Mixed Speed
1263 Pts Hugely faster OC multi-core speed.
625 Pts
Market Share
Based on 7,906,321 CPUs tested.
Market Share
Market Share (trailing 30 days)
3.59 % Hugely higher market share.
0.75 %
Value For Money
105 % Much better value.
66.8 %
User Rating
UBM User Rating
142 % Hugely more popular.
74 %
Price (score)
$330 +4% $343
5 Months Hugely more recent.
86 Months
Thermal Design Power (TDP)
95 Watts 95 Watts
CPU Processing Cores
6 cores Much higher core count.
4 cores
CPU Processing Threads
12 threads Much higher thread count.
8 threads
Manufacturing process
14 nm Much newer manufacturing.
32 nm
Base Clock
Base Clock Speed
3.7 GHz Slightly faster base frequency.
3.4 GHz
Turbo Clock
Turbo Clock Speed
4.7 GHz Faster turbo frequency.
3.8 GHz
SC Int
Single Core Integer Speed
154 Pts Faster single-core int speed.
122 Pts
SC Float
Single Core Floating Point Speed
161 Pts Much faster single-core fp speed.
122 Pts
QC Int
Quad Core Integer Speed
612 Pts Much faster quad-core int speed.
453 Pts
QC Float
Quad Core Floating Point Speed
638 Pts Much faster quad-core fp speed.
456 Pts
MC Int
Multi Core Integer Speed
1165 Pts Hugely faster multi-core int speed.
603 Pts
MC Float
Multi Core Floating Point Speed
1336 Pts Hugely faster multi-core fp speed.
622 Pts
CPU Architecture
Coffee Lake (2017) Sandy Bridge (2011)
Motherboard Socket
FCLGA1151 LGA1155
Integrated Graphics
UHD 630 HD 3000
Launch Date
Launch Date
Q4'17 Q1'11
12 MB 8 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX
14 nm 32 nm
Bus Speed
Bus Speed
8 GT/s DMI3 5 GT/s DMI
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 32 GB
Memory Types
Memory Types
DDR4-2666 DDR3 1066/1333
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 3000
Graphics Base Frequency
Graphics Base Frequency
350 MHz 850 MHz
# of Displays Supported
# of Displays Supported ‡
3 2
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.20 GHz 1.35 GHz
Virtualization for Directed I/O (VT-d)
Intel® Virtualization Technology for Directed I/O (VT-d) ‡
Yes No
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No
PCI Express Revision
PCI Express Revision
3.0 2.0

More specs » More specs »

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]


The i7-2600K Sandy Bridge processor is two generations old and nearly three years out of date. The numerous owners of this superb processor should feel in no hurry to upgrade as it's still one of the fastest consumer processors, even by today's standards. The benchmark figures indicate that in terms of real-world performance this processor is only 5% slower than the third generation Ivy Bridge i7-3770K, not bad considering its age. That said new buyers will find both better energy efficiency and marginal performance improvements elsewhere[Feb '12 CPUPro]


Processor Rankings (Price vs Performance) March 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]


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.

UserBenchmark of the month

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
  • - 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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Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $150
Intel Core i5-8600K $235AMD RX 480 $400Samsung 850 Pro 256GB $121
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $170SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $205SanDisk Extreme 16GB $18
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