IntelBX80662I76700K
IntelBX80648I75820K
Real World Speed
Performance profile from 152,817 user samples
130,871 User Benchmarks
Best Bench: 106% Base clock 4 GHz, turbo 4.8 GHz (avg)
Worst Bench: 81% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 81% Great: 106%
SPEED RANK: 9th / 961
Gaming
Gaming 92%
Nuclear submarine
Desktop
Desktop 92%
Nuclear submarine
Workstation
Workstation 68%
Battle cruiser
21,946 User Benchmarks
Best Bench: 104% Base clock 3.3 GHz, turbo 3.7 GHz (avg)
Worst Bench: 70% Base clock 3.3 GHz, turbo 0.4 GHz (avg)
Poor: 70% Great: 104%
SPEED RANK: 18th / 961
Gaming
Gaming 86%
Aircraft carrier
Desktop
Desktop 82%
Aircraft carrier
Workstation
Workstation 76%
Battleship
Effective Speed
Effective CPU Speed
92.1 % Slightly faster effective speed.
+8%
85.6 % -8%
SC Mixed
Avg. Single Core Mixed Speed
129 Pts Faster single-core speed.
+22%
106 Pts -22%
QC Mixed
Avg. Quad Core Mixed Speed
452 Pts Slightly faster quad-core speed.
+8%
420 Pts -8%
MC Mixed
Avg. Multi Core Mixed Speed
688 Pts -25% 863 Pts Faster multi-core speed.
+25%
SC Mixed
OC Single Core Mixed Speed
144 Pts Slightly faster OC single-core speed.
+11%
130 Pts -11%
QC Mixed
OC Quad Core Mixed Speed
536 Pts +5% 511 Pts -5%
MC Mixed
OC Multi Core Mixed Speed
777 Pts -35% 1048 Pts Much faster OC multi-core speed.
+35%
Market Share
Based on 4,073,765 CPUs tested.
Market Share
Market Share (trailing 30 days)
3.9 % Hugely higher market share.
+474%
0.68 % -474%
Value
Value For Money
92.3 % Slightly better value.
+14%
80.8 % -14%
User Rating
UBM User Rating
95 % More popular.
+27%
75 % -27%
Price
Price (score)
$290 Slightly cheaper.
+15%
$340 -15%
Age
Newest
22 Months Much more recent.
+35%
34 Months -35%
TDP
Thermal Design Power (TDP)
91 Watts Much more energy efficient.
+35%
140 Watts -35%
Cores
CPU Processing Cores
4 cores -50% 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
8 threads -50% 12 threads Much higher thread count.
+50%
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+36%
22 nm -36%
Base Clock
Base Clock Speed
4 GHz Faster base frequency.
+21%
3.3 GHz -21%
Turbo Clock
Turbo Clock Speed
4.2 GHz Faster turbo frequency.
+17%
3.6 GHz -17%
SC Int
Single Core Integer Speed
141 Pts Slightly faster single-core int speed.
+7%
132 Pts -7%
SC Float
Single Core Floating Point Speed
148 Pts Slightly faster single-core fp speed.
+11%
133 Pts -11%
QC Int
Quad Core Integer Speed
519 Pts -0% 521 Pts +0%
QC Float
Quad Core Floating Point Speed
552 Pts +4% 530 Pts -4%
MC Int
Multi Core Integer Speed
718 Pts -39% 999 Pts Much faster multi-core int speed.
+39%
MC Float
Multi Core Floating Point Speed
814 Pts -30% 1057 Pts Faster multi-core fp speed.
+30%
Series
CPU Architecture
Skylake (2015) Haswell-E (2014)
Socket
Motherboard Socket
FCLGA1151 LGA2011-V3
Graphics
Integrated Graphics
HD 530 None
Launch Date
Launch Date
Q3'15 Q3'14
Cache
Cache
8 MB SmartCache 15 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.2, AVX 2.0, AES
Lithography
Lithography
14 nm 22 nm
Recommended Price
Recommended Customer Price
$339.00 - $350.00 $389.00 - $396.00
Bus Speed
Bus Speed
8 GT/s DMI3 0 GT/s
Memory Types
Memory Types
DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR4 1333/1600/2133
Memory Channels
Max # of Memory Channels
2 4
Memory Bandwidth
Max Memory Bandwidth
34.1 GB/s 68 GB/s
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 530 None
Package Size
Package Size
37.5mm x 37.5mm 52.5mm x 45.0mm
Max # of PCI Express Lanes
Max # of PCI Express Lanes
16 28

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]

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The Intel Core i7-5820K is the cheapest of three (5820K,5930K,5960X) new Haswell-E prosumer/enthusiast processors. The 5820K sports six physical cores and twelve threads which allow for enormous processing throughput. Unfortunately Intel have somewhat handicapped the 5820K by setting its base clock at just 3.3 GHz, 0.7GHz lower than the class leading 4790K. Comparing the 4790K and 5820K shows that the cheaper i7-4790K is significantly faster at both single and dual threaded workloads. The additional two cores found in the 5820K are not relevant to general computing and as such the 5820K probably makes a better server rather than consumer proposition. The Haswell-E X99 architecture also requires DDR4 RAM which is currently far more expensive than DDR3. Overall the 5820K is a very expensive option and probably best avoided by the vast majority of consumers.  [Sep '14 CPUPro]

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Processor Rankings (Price vs Performance) June 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]

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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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  • - 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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CPUGPUSSD
Intel Core i7-7700K $309Nvidia GTX 1070 $390Samsung 850 Evo 250GB $90
Intel Core i5-7600K $231AMD RX 480 $608Samsung 850 Pro 256GB $135
AMD Ryzen 7 1700 $280Nvidia GTX 1060-6GB $248Samsung 850 Evo 500GB $167
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $34
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $696SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $40HyperX Fury DDR4 2133 C14 2x8GB $133SanDisk Ultra Fit 32GB $13
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