IntelBX80662I76700K
IntelBX80623I52500K
$246

4 Cores, 8 Threads @4.0GHz, Skylake.
Release date: Q3 2015.

 $246 

4 Cores, 4 Threads @3.3GHz, Sandy Bridge.
Release date: Q1 2011.

Real World Speed
Performance profile from 319,154 user samples
249,619 User Benchmarks
Best Bench: 102% Base clock 4 GHz, turbo 5 GHz (avg)
Worst Bench: 72% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 72% Great: 102%
SPEED RANK: 40th / 1137
Gaming
Gaming 87%
Aircraft carrier
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 65%
Battle cruiser
69,535 User Benchmarks
Best Bench: 89% Base clock 3.3 GHz, turbo 5.1 GHz (avg)
Worst Bench: 52% Base clock 3.3 GHz
Poor: 52% Great: 89%
SPEED RANK: 128th / 1137
Gaming
Gaming 71%
Battleship
Desktop
Desktop 70%
Battle cruiser
Workstation
Workstation 43%
Speed boat
Effective Speed
Effective CPU Speed
87.2 % Faster effective speed.
+23%
71 %
SC Mixed
Avg. Single Core Mixed Speed
125 Pts Faster single-core speed.
+27%
98.7 Pts
QC Mixed
Avg. Quad Core Mixed Speed
423 Pts Faster quad-core speed.
+16%
366 Pts
MC Mixed
Avg. Multi Core Mixed Speed
661 Pts Much faster multi-core speed.
+77%
374 Pts
SC Mixed
OC Single Core Mixed Speed
143 Pts Faster OC single-core speed.
+17%
122 Pts
QC Mixed
OC Quad Core Mixed Speed
516 Pts Slightly faster OC quad-core speed.
+10%
469 Pts
MC Mixed
OC Multi Core Mixed Speed
761 Pts Much faster OC multi-core speed.
+61%
474 Pts
Market Share
Based on 12,270,293 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.8 % Hugely higher market share.
+157%
0.7 %
Value
Value For Money
87.6 % Better value.
+16%
75.6 %
User Rating
UBM User Rating
85 % More popular.
+21%
70 %
Price
Price (score)
$288 $246 Slightly cheaper.
+14%
Age
Newest
39 Months Much more recent.
+59%
94 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 GHz Faster base frequency.
+21%
3.3 GHz
Turbo Clock
Turbo Clock Speed
4.2 GHz Slightly faster turbo frequency.
+14%
3.7 GHz
SC Int
Single Core Integer Speed
139 Pts Slightly faster single-core int speed.
+14%
122 Pts
SC Float
Single Core Floating Point Speed
147 Pts Faster single-core fp speed.
+20%
122 Pts
QC Int
Quad Core Integer Speed
503 Pts Slightly faster quad-core int speed.
+7%
471 Pts
QC Float
Quad Core Floating Point Speed
538 Pts Slightly faster quad-core fp speed.
+14%
472 Pts
MC Int
Multi Core Integer Speed
695 Pts Much faster multi-core int speed.
+47%
472 Pts
MC Float
Multi Core Floating Point Speed
809 Pts Much faster multi-core fp speed.
+70%
475 Pts
Series
CPU Architecture
Skylake Sandy Bridge
Socket
Motherboard Socket
FCLGA1151 LGA1155
Graphics
Integrated Graphics
HD 530 HD 3000
Launch Date
Launch Date
Q3'15 Q1'11
Cache
Cache
8 MB SmartCache 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
DDR4-1866/2133, 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
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
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 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

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) November 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.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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