IntelBX80623I72600K
IntelBX80662I76700K

4 Cores, 8 Threads
@3.4GHz Sandy Bridge (2011)

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

Real World Speed
Performance profile from 165,136 user samples
27,972 User Benchmarks
Best Bench: 88% Base clock 3.4 GHz, turbo 4.8 GHz (avg)
Worst Bench: 59% Base clock 3.4 GHz, turbo 0.2 GHz (avg)
Poor: 59% Great: 88%
SPEED RANK: 89th / 966
Gaming
Gaming 71%
Battleship
Desktop
Desktop 72%
Battleship
Workstation
Workstation 51%
Yacht
137,164 User Benchmarks
Best Bench: 106% Base clock 4 GHz, turbo 5 GHz (avg)
Worst Bench: 81% Base clock 4 GHz, turbo 0.55 GHz (avg)
Poor: 81% Great: 106%
SPEED RANK: 11th / 966
Gaming
Gaming 92%
Nuclear submarine
Desktop
Desktop 93%
Nuclear submarine
Workstation
Workstation 68%
Battle cruiser
Effective Speed
Effective CPU Speed
71.1 % -30% 92.4 % Faster effective speed.
+30%
SC Mixed
Avg. Single Core Mixed Speed
102 Pts -26% 129 Pts Faster single-core speed.
+26%
QC Mixed
Avg. Quad Core Mixed Speed
348 Pts -30% 454 Pts Much faster quad-core speed.
+30%
MC Mixed
Avg. Multi Core Mixed Speed
499 Pts -39% 692 Pts Much faster multi-core speed.
+39%
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
450 Pts -18% 529 Pts Faster OC quad-core speed.
+18%
MC Mixed
OC Multi Core Mixed Speed
616 Pts -26% 777 Pts Faster OC multi-core speed.
+26%
Market Share
Based on 4,408,643 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.74 % -297% 2.94 % Hugely higher market share.
+297%
Value
Value For Money
72.3 % -27% 92 % Better value.
+27%
User Rating
UBM User Rating
72 % -38% 99 % Much more popular.
+38%
Price
Price (score)
$279 Slightly cheaper.
+5%
$295 -5%
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
8 threads 0% 8 threads 0%
Lithography
Manufacturing process
32 nm -56% 14 nm Much newer manufacturing.
+56%
Base Clock
Base Clock Speed
3.4 GHz -18% 4 GHz Faster base frequency.
+18%
Turbo Clock
Turbo Clock Speed
3.8 GHz -11% 4.2 GHz Slightly faster turbo frequency.
+11%
SC Int
Single Core Integer Speed
121 Pts -16% 140 Pts Faster single-core int speed.
+16%
SC Float
Single Core Floating Point Speed
121 Pts -22% 148 Pts Faster single-core fp speed.
+22%
QC Int
Quad Core Integer Speed
449 Pts -16% 523 Pts Faster quad-core int speed.
+16%
QC Float
Quad Core Floating Point Speed
446 Pts -24% 554 Pts Faster quad-core fp speed.
+24%
MC Int
Multi Core Integer Speed
593 Pts -21% 716 Pts Faster multi-core int speed.
+21%
MC Float
Multi Core Floating Point Speed
614 Pts -33% 814 Pts Much faster multi-core fp speed.
+33%
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
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
1.35 GHz 1.15 GHz
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 »
ADVERTISEMENT

The i7-2600K Sandy Bridge processor is two generations old and nearly three years out of date. The numerous owners of this superb processor should feel in no hurry to upgrade as it's still one of the fastest consumer processors, even by today's standards. The benchmark figures indicate that in terms of real-world performance this processor is only 5% slower than the third generation Ivy Bridge i7-3770K, not bad considering its age. That said new buyers will find both better energy efficiency and marginal performance improvements elsewhere[Feb '12 CPUPro]

MORE DETAILS

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) 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.

UserBenchmark of the month

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

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-7700K $295Nvidia GTX 1070 $380Samsung 850 Evo 250GB $97
AMD Ryzen 7 1700 $268AMD RX 480 $410Samsung 850 Pro 256GB $120
Intel Core i5-7600K $235Nvidia GTX 1060-6GB $269Samsung 850 Evo 500GB $165
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $137SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $83G.SKILL Trident Z DDR4 3200 C14 4x16GB $714SanDisk Extreme 32GB $23
Seagate Barracuda 7200.14 1TB $44HyperX Fury DDR4 2133 C14 2x8GB $128SanDisk Ultra Fit 32GB $13
Today's hottest deals
User Guide  •  About  •  FAQs  •  @Email  •  Privacy  •  Developer Feedback