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 165,425 user samples
36,697 User Benchmarks
Best Bench: 91% Base clock 3.3 GHz, turbo 5.2 GHz (avg)
Worst Bench: 53% Base clock 3.3 GHz, turbo 0.55 GHz (avg)
Poor: 53% Great: 91%
SPEED RANK: 83rd / 966
Gaming
Gaming 72%
Battleship
Desktop
Desktop 70%
Battleship
Workstation
Workstation 43%
Speed boat
128,728 User Benchmarks
Best Bench: 106% Base clock 4 GHz, turbo 4 GHz (avg)
Worst Bench: 79% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 79% Great: 106%
SPEED RANK: 12th / 966
Gaming
Gaming 92%
Nuclear submarine
Desktop
Desktop 92%
Nuclear submarine
Workstation
Workstation 67%
Battle cruiser
Effective Speed
Effective CPU Speed
71.6 % -28% 91.7 % Faster effective speed.
+28%
SC Mixed
Avg. Single Core Mixed Speed
99.2 Pts -29% 128 Pts Faster single-core speed.
+29%
QC Mixed
Avg. Quad Core Mixed Speed
370 Pts -22% 451 Pts Faster quad-core speed.
+22%
MC Mixed
Avg. Multi Core Mixed Speed
379 Pts -80% 681 Pts Much faster multi-core speed.
+80%
SC Mixed
OC Single Core Mixed Speed
122 Pts -18% 144 Pts Faster OC single-core speed.
+18%
QC Mixed
OC Quad Core Mixed Speed
479 Pts -12% 538 Pts Slightly faster OC quad-core speed.
+12%
MC Mixed
OC Multi Core Mixed Speed
477 Pts -63% 777 Pts Much faster OC multi-core speed.
+63%
Market Share
Based on 4,396,041 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.77 % -355% 3.5 % Hugely higher market share.
+355%
Value
Value For Money
76.2 % -20% 91.3 % Better value.
+20%
User Rating
UBM User Rating
80 % -24% 99 % More popular.
+24%
Price
Price (score)
$246 Cheaper.
+16%
$295 -16%
Age
Newest
78 Months -71% 23 Months Much more recent.
+71%
TDP
Thermal Design Power (TDP)
95 Watts -4% 91 Watts +4%
Cores
CPU Processing Cores
4 cores 0% 4 cores 0%
Threads
CPU Processing Threads
4 threads -100% 8 threads Hugely higher thread count.
+100%
Lithography
Manufacturing process
32 nm -56% 14 nm Much newer manufacturing.
+56%
Base Clock
Base Clock Speed
3.3 GHz -21% 4 GHz Faster base frequency.
+21%
Turbo Clock
Turbo Clock Speed
3.7 GHz -14% 4.2 GHz Slightly faster turbo frequency.
+14%
SC Int
Single Core Integer Speed
122 Pts -16% 141 Pts Faster single-core int speed.
+16%
SC Float
Single Core Floating Point Speed
122 Pts -21% 148 Pts Faster single-core fp speed.
+21%
QC Int
Quad Core Integer Speed
481 Pts -8% 521 Pts Slightly faster quad-core int speed.
+8%
QC Float
Quad Core Floating Point Speed
479 Pts -15% 552 Pts Faster quad-core fp speed.
+15%
MC Int
Multi Core Integer Speed
480 Pts -50% 719 Pts Much faster multi-core int speed.
+50%
MC Float
Multi Core Floating Point Speed
482 Pts -69% 815 Pts Much faster multi-core fp speed.
+69%
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]

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Processor Rankings (Price vs Performance) July 2017 CPU Rankings.

Welcome to our desktop CPU comparison. We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by price to yield a value for money rating which is geared towards gamers. Calculated values don't always paint the whole picture so we check them against hundreds of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top CPUs. [CPUPro]

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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  • - CPU tests include: integer, floating and string.
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  • - 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.
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  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
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CPUGPUSSD
Intel Core i7-7700K $295Nvidia GTX 1070 $380Samsung 850 Evo 250GB $97
AMD Ryzen 7 1700 $268AMD RX 480 $260Samsung 850 Pro 256GB $136
Intel Core i5-7600K $238Nvidia GTX 1060-6GB $239Samsung 850 Evo 500GB $159
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $714SanDisk Extreme 64GB $33
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Seagate Barracuda 7200.14 1TB $44HyperX Fury DDR4 2133 C14 2x8GB $131SanDisk Ultra Fit 32GB $13
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