IntelBX80623I52500K
$246
IntelBX80662I76700K
 $246 

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

4 Cores, 8 Threads
@4.0GHz Skylake (2015)

Real World Speed
Performance profile from 258,649 user samples
57,389 User Benchmarks
Best Bench: 90% Base clock 3.3 GHz, turbo 5 GHz (avg)
Worst Bench: 52% Base clock 3.6 GHz, turbo 0.75 GHz (avg)
Poor: 52% Great: 90%
SPEED RANK: 118th / 1104
Gaming
Gaming 71%
Battleship
Desktop
Desktop 70%
Battle cruiser
Workstation
Workstation 43%
Speed boat
201,260 User Benchmarks
Best Bench: 105% Base clock 4 GHz, turbo 4.8 GHz (avg)
Worst Bench: 77% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 77% Great: 105%
SPEED RANK: 32nd / 1104
Gaming
Gaming 91%
Nuclear submarine
Desktop
Desktop 92%
Nuclear submarine
Workstation
Workstation 67%
Battle cruiser
Effective Speed
Effective CPU Speed
71.2 % 90.9 % Faster effective speed.
+28%
SC Mixed
Avg. Single Core Mixed Speed
98.4 Pts 129 Pts Much faster single-core speed.
+31%
QC Mixed
Avg. Quad Core Mixed Speed
369 Pts 443 Pts Faster quad-core speed.
+20%
MC Mixed
Avg. Multi Core Mixed Speed
375 Pts 676 Pts Hugely faster multi-core speed.
+80%
SC Mixed
OC Single Core Mixed Speed
120 Pts 144 Pts Faster OC single-core speed.
+20%
QC Mixed
OC Quad Core Mixed Speed
472 Pts 529 Pts Slightly faster OC quad-core speed.
+12%
MC Mixed
OC Multi Core Mixed Speed
474 Pts 769 Pts Much faster OC multi-core speed.
+62%
Market Share
Based on 8,845,010 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.72 % 1.92 % Hugely higher market share.
+167%
Value
Value For Money
75.9 % 87.2 % Slightly better value.
+15%
User Rating
UBM User Rating
69 % 82 % More popular.
+19%
Price
Price (score)
$246 Cheaper.
+24%
$325
Age
Newest
88 Months 33 Months Much more recent.
+62%
TDP
Thermal Design Power (TDP)
95 Watts 91 Watts +4%
Cores
CPU Processing Cores
4 cores 4 cores
Threads
CPU Processing Threads
4 threads 8 threads Hugely higher thread count.
+100%
Lithography
Manufacturing process
32 nm 14 nm Much newer manufacturing.
+56%
Base Clock
Base Clock Speed
3.3 GHz 4 GHz Faster base frequency.
+21%
Turbo Clock
Turbo Clock Speed
3.7 GHz 4.2 GHz Slightly faster turbo frequency.
+14%
SC Int
Single Core Integer Speed
120 Pts 142 Pts Faster single-core int speed.
+18%
SC Float
Single Core Floating Point Speed
121 Pts 147 Pts Faster single-core fp speed.
+21%
QC Int
Quad Core Integer Speed
473 Pts 518 Pts Slightly faster quad-core int speed.
+10%
QC Float
Quad Core Floating Point Speed
474 Pts 549 Pts Faster quad-core fp speed.
+16%
MC Int
Multi Core Integer Speed
473 Pts 708 Pts Much faster multi-core int speed.
+50%
MC Float
Multi Core Floating Point Speed
475 Pts 812 Pts Much faster multi-core fp speed.
+71%
Series
CPU Architecture
Sandy Bridge (2011) Skylake (2015)
Socket
Motherboard Socket
LGA1155 FCLGA1151
Graphics
Integrated Graphics
HD 3000 HD 530
Launch Date
Launch Date
Q1'11 Q3'15
Cache
Cache
6 MB SmartCache 8 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX SSE4.1/4.2, AVX 2.0
Lithography
Lithography
32 nm 14 nm
Recommended Price
Recommended Customer Price
N/A $339.00 - $350.00
Bus Speed
Bus Speed
5 GT/s DMI 8 GT/s DMI3
Max Memory Size
Max Memory Size (dependent on memory type)
32 GB 64 GB
Memory Types
Memory Types
DDR3 1066/1333 DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
Memory Bandwidth
Max Memory Bandwidth
21 GB/s 34.1 GB/s
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 3000 Intel® HD Graphics 530
Graphics Base Frequency
Graphics Base Frequency
850 MHz 350 MHz
Wireless Display
Intel® Wireless Display
No Yes
# of Displays Supported
# of Displays Supported ‡
2 3
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.1 GHz 1.15 GHz
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
No Yes
Virtualization for Directed I/O (VT-d)
Intel® Virtualization Technology for Directed I/O (VT-d) ‡
No Yes
PCI Express Revision
PCI Express Revision
2.0 3.0

More specs » More specs »
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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]

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The Core i7-6700K is Intel's latest "Skylake" flagship processor. It replaces the hugely successful i7-4790K and takes the crown as the fastest mainstream consumer CPU available. Comparing performance and specs between the 4790K and 6700K shows that the configuration is largely unchanged (same base clocks, cores, threads) but the improved manufacturing process (14nm) brings a small reduction in TDP and a performance improvement of 8%; almost exactly the same jump as between the Ivy Bridge 3770K and Haswell 4770K. Owners of any unlocked-K Intel CPU from Sandy Bridge or onwards still have no real reason to upgrade as the performance improvements are largely academic but the i7-6700K will be the CPU of choice for the vast majority of top end PC builds in 2015. [Aug '15 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) May 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.

 Frequently Asked Questions

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CPUGPUSSD
AMD Ryzen 5 1600 $169Nvidia GTX 1070 $447Samsung 850 Evo 250GB $100
Intel Core i7-8700K $325Nvidia GTX 1060-6GB $295Samsung 850 Evo 500GB $137
Intel Core i7-7700K $299AMD RX 480 $330Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $180SanDisk Extreme 64GB $41
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $960SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $60HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Extreme 16GB $20
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