IntelBX80677I77700K
IntelBX80623I52500K
$246

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

 $246 

4 Cores, 4 Threads
@3.3GHz Sandy Bridge (2011)

Real World Speed
Performance profile from 233,074 user samples
165,855 User Benchmarks
Best Bench: 109% Base clock 4.2 GHz, turbo 5.1 GHz (avg)
Worst Bench: 86% Base clock 4.2 GHz, turbo 4.2 GHz (avg)
Poor: 86% Great: 109%
SPEED RANK: 20th / 1117
Gaming
Gaming 97%
Nuclear submarine
Desktop
Desktop 98%
Nuclear submarine
Workstation
Workstation 72%
Battleship
67,219 User Benchmarks
Best Bench: 90% Base clock 3.3 GHz, turbo 5 GHz (avg)
Worst Bench: 52% Base clock 3.3 GHz, turbo 0.6 GHz (avg)
Poor: 52% Great: 90%
SPEED RANK: 126th / 1117
Gaming
Gaming 71%
Battleship
Desktop
Desktop 69%
Battle cruiser
Workstation
Workstation 43%
Speed boat
Effective Speed
Effective CPU Speed
96.6 % Much faster effective speed.
+37%
70.8 %
SC Mixed
Avg. Single Core Mixed Speed
137 Pts Much faster single-core speed.
+39%
98.3 Pts
QC Mixed
Avg. Quad Core Mixed Speed
470 Pts Faster quad-core speed.
+29%
365 Pts
MC Mixed
Avg. Multi Core Mixed Speed
734 Pts Hugely faster multi-core speed.
+97%
373 Pts
SC Mixed
OC Single Core Mixed Speed
152 Pts Faster OC single-core speed.
+27%
120 Pts
QC Mixed
OC Quad Core Mixed Speed
552 Pts Faster OC quad-core speed.
+17%
472 Pts
MC Mixed
OC Multi Core Mixed Speed
815 Pts Much faster OC multi-core speed.
+72%
475 Pts
Market Share
Based on 9,763,778 CPUs tested.
Market Share
Market Share (trailing 30 days)
2.9 % Hugely higher market share.
+504%
0.48 %
Value
Value For Money
98.8 % Much better value.
+31%
75.4 %
User Rating
UBM User Rating
124 % Hugely more popular.
+91%
65 %
Price
Price (score)
$275 $246 Slightly cheaper.
+10%
Age
Newest
18 Months Much more recent.
+80%
90 Months
TDP
Thermal Design Power (TDP)
91 Watts +4% 95 Watts
Cores
CPU Processing Cores
4 cores 4 cores
Threads
CPU Processing Threads
8 threads Hugely higher thread count.
+100%
4 threads
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+56%
32 nm
Base Clock
Base Clock Speed
4.2 GHz Faster base frequency.
+27%
3.3 GHz
Turbo Clock
Turbo Clock Speed
4.5 GHz Faster turbo frequency.
+22%
3.7 GHz
SC Int
Single Core Integer Speed
148 Pts Faster single-core int speed.
+22%
121 Pts
SC Float
Single Core Floating Point Speed
156 Pts Faster single-core fp speed.
+29%
121 Pts
QC Int
Quad Core Integer Speed
531 Pts Slightly faster quad-core int speed.
+12%
474 Pts
QC Float
Quad Core Floating Point Speed
570 Pts Faster quad-core fp speed.
+20%
475 Pts
MC Int
Multi Core Integer Speed
749 Pts Much faster multi-core int speed.
+57%
476 Pts
MC Float
Multi Core Floating Point Speed
861 Pts Hugely faster multi-core fp speed.
+81%
477 Pts
Series
CPU Architecture
Kaby Lake (2017) Sandy Bridge (2011)
Socket
Motherboard Socket
FCLGA1151 LGA1155
Graphics
Integrated Graphics
HD 630 HD 3000
Launch Date
Launch Date
Q1'17 Q1'11
Cache
Cache
8 MB 6 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX
Lithography
Lithography
14 nm 32 nm
Recommended Price
Recommended Customer Price
$339.00 - $350.00 N/A
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
DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V DDR3 1066/1333
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 630 Intel® HD Graphics 3000
Graphics Base Frequency
Graphics Base Frequency
350.00 MHz 850 MHz
# of Displays Supported
# of Displays Supported ‡
3 2
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.15 GHz 1.1 GHz
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
PCI Express Revision
PCI Express Revision
3.0 2.0

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 i5-2500K is a second generation Sandy Bridge processor which is currently two generations old and nearly three years out of date. The many users that had the good sense to purchase this processor should feel in no hurry to upgrade as it's still no slouch, even by today's standards. The benchmark figures indicate that, even at stock clock rates, in terms of real-world performance this processor is approximately 20% slower than the best currently available, not bad considering its age. Given that the 2500K has an unlocked multiplier upping its performance by 10% with stock cooling should not pose much of a problem for the majority of owners. Here is a detailed performance comparison of the 2500K vs 4670K.  [Jul '13 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) July 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.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - 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 current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.

 Frequently Asked Questions

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CPUGPUSSD
Intel Core i7-8700K $318Nvidia GTX 1070 $413Samsung 850 Evo 250GB $100
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $289Samsung 850 Evo 500GB $121
Intel Core i7-7700K $275AMD RX 480 $280Samsung 850 Pro 256GB $160
HDDRAMUSB
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Seagate Barracuda 3TB (2016) $74G.SKILL Trident Z DDR4 3200 C14 4x16GB $951SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $59HyperX Fury DDR4 2133 C14 2x8GB $219SanDisk Ultra Fit 32GB $12
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