IntelBX80662I56600K
IntelBX80623I52500K
$246

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

 $246 

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

Real World Speed
Performance profile from 184,650 user samples
124,806 User Benchmarks
Best Bench: 106% Base clock 3.5 GHz, turbo 4.8 GHz (avg)
Worst Bench: 67% Base clock 3.5 GHz, turbo 0.75 GHz (avg)
Poor: 67% Great: 106%
SPEED RANK: 39th / 1110
Gaming
Gaming 88%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 53%
Yacht
59,844 User Benchmarks
Best Bench: 89% Base clock 3.3 GHz, turbo 5 GHz (avg)
Worst Bench: 54% Base clock 3.3 GHz, turbo 23,866,404 GHz (avg)
Poor: 54% Great: 89%
SPEED RANK: 116th / 1110
Gaming
Gaming 72%
Battleship
Desktop
Desktop 70%
Battleship
Workstation
Workstation 44%
Speed boat
Effective Speed
Effective CPU Speed
87.8 % Faster effective speed.
+22%
71.8 %
SC Mixed
Avg. Single Core Mixed Speed
121 Pts Faster single-core speed.
+21%
99.8 Pts
QC Mixed
Avg. Quad Core Mixed Speed
455 Pts Faster quad-core speed.
+23%
371 Pts
MC Mixed
Avg. Multi Core Mixed Speed
467 Pts Faster multi-core speed.
+23%
379 Pts
SC Mixed
OC Single Core Mixed Speed
144 Pts Faster OC single-core speed.
+21%
119 Pts
QC Mixed
OC Quad Core Mixed Speed
558 Pts Faster OC quad-core speed.
+19%
470 Pts
MC Mixed
OC Multi Core Mixed Speed
562 Pts Faster OC multi-core speed.
+18%
475 Pts
Market Share
Based on 9,377,165 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.14 % Much higher market share.
+65%
0.69 %
Value
Value For Money
97.3 % Better value.
+27%
76.5 %
User Rating
UBM User Rating
67 % Slightly more popular.
+12%
60 %
Price
Price (score)
$222 Slightly cheaper.
+10%
$246
Age
Newest
34 Months Much more recent.
+62%
89 Months
TDP
Thermal Design Power (TDP)
91 Watts +4% 95 Watts
Cores
CPU Processing Cores
4 cores 4 cores
Threads
CPU Processing Threads
4 threads 4 threads
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+56%
32 nm
Base Clock
Base Clock Speed
3.5 GHz Slightly faster base frequency.
+6%
3.3 GHz
Turbo Clock
Turbo Clock Speed
3.9 GHz Slightly faster turbo frequency.
+5%
3.7 GHz
SC Int
Single Core Integer Speed
140 Pts Faster single-core int speed.
+18%
119 Pts
SC Float
Single Core Floating Point Speed
149 Pts Faster single-core fp speed.
+24%
120 Pts
QC Int
Quad Core Integer Speed
542 Pts Faster quad-core int speed.
+15%
471 Pts
QC Float
Quad Core Floating Point Speed
583 Pts Faster quad-core fp speed.
+23%
474 Pts
MC Int
Multi Core Integer Speed
543 Pts Faster multi-core int speed.
+15%
472 Pts
MC Float
Multi Core Floating Point Speed
586 Pts Faster multi-core fp speed.
+24%
472 Pts
Series
CPU Architecture
Skylake (2015) Sandy Bridge (2011)
Socket
Motherboard Socket
FCLGA1151 LGA1155
Graphics
Integrated Graphics
HD 530 HD 3000
Launch Date
Launch Date
Q3'15 Q1'11
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
$242.00 - $243.00 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
DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR3 1066/1333
Memory Bandwidth
Max Memory Bandwidth
34.1 GB/s 21 GB/s
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 530 Intel® HD Graphics 3000
Graphics Base Frequency
Graphics Base Frequency
350 MHz 850 MHz
Wireless Display
Intel® Wireless Display
Yes No
# of Displays Supported
# of Displays Supported ‡
3 2
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.15 GHz 1.1 GHz
Virtualization for Directed I/O (VT-d)
Intel® Virtualization Technology for Directed I/O (VT-d) ‡
Yes No
PCI Express Revision
PCI Express Revision
3.0 2.0

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]

MORE DETAILS

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) June 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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