IntelBX80677I77700K
IntelBX80648I75820K

4 Cores, 8 Threads
@4.2GHz Kaby Lake (2017)

6 Cores, 12 Threads
@3.3GHz Haswell-E (2014)

Real World Speed
Performance profile from 168,150 user samples
137,623 User Benchmarks
Best Bench: 113% Base clock 4.2 GHz, turbo 5.1 GHz (avg)
Worst Bench: 88% Base clock 4.2 GHz, turbo 0.85 GHz (avg)
Poor: 88% Great: 113%
SPEED RANK: 12th / 985
Gaming
Gaming 100%
Nuclear submarine
Desktop
Desktop 101%
UFO
Workstation
Workstation 74%
Battleship
30,527 User Benchmarks
Best Bench: 104% Base clock 3.3 GHz, turbo 4.7 GHz (avg)
Worst Bench: 67% Base clock 3.3 GHz, turbo 1.2 GHz (avg)
Poor: 67% Great: 104%
SPEED RANK: 37th / 985
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 82%
Aircraft carrier
Workstation
Workstation 75%
Battleship
Effective Speed
Effective CPU Speed
100 % Faster effective speed.
+18%
85.1 %
SC Mixed
Avg. Single Core Mixed Speed
140 Pts Much faster single-core speed.
+32%
106 Pts
QC Mixed
Avg. Quad Core Mixed Speed
491 Pts Faster quad-core speed.
+17%
418 Pts
MC Mixed
Avg. Multi Core Mixed Speed
742 Pts 843 Pts Slightly faster multi-core speed.
+14%
SC Mixed
OC Single Core Mixed Speed
154 Pts Faster OC single-core speed.
+18%
131 Pts
QC Mixed
OC Quad Core Mixed Speed
567 Pts Slightly faster OC quad-core speed.
+9%
520 Pts
MC Mixed
OC Multi Core Mixed Speed
823 Pts 1029 Pts Faster OC multi-core speed.
+25%
Market Share
Based on 7,412,738 CPUs tested.
Market Share
Market Share (trailing 30 days)
2.86 % Hugely higher market share.
+694%
0.36 %
Value
Value For Money
100 % Much better value.
+31%
76.2 %
User Rating
UBM User Rating
137 % Much more popular.
+65%
83 %
Price
Price (score)
$290 Cheaper.
+26%
$391
Age
Newest
13 Months Much more recent.
+69%
42 Months
TDP
Thermal Design Power (TDP)
91 Watts Much more energy efficient.
+35%
140 Watts
Cores
CPU Processing Cores
4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
8 threads 12 threads Much higher thread count.
+50%
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+36%
22 nm
Base Clock
Base Clock Speed
4.2 GHz Faster base frequency.
+27%
3.3 GHz
Turbo Clock
Turbo Clock Speed
4.5 GHz Faster turbo frequency.
+25%
3.6 GHz
SC Int
Single Core Integer Speed
152 Pts Faster single-core int speed.
+17%
130 Pts
SC Float
Single Core Floating Point Speed
158 Pts Faster single-core fp speed.
+20%
132 Pts
QC Int
Quad Core Integer Speed
548 Pts Slightly faster quad-core int speed.
+7%
513 Pts
QC Float
Quad Core Floating Point Speed
584 Pts Slightly faster quad-core fp speed.
+12%
520 Pts
MC Int
Multi Core Integer Speed
763 Pts 980 Pts Faster multi-core int speed.
+28%
MC Float
Multi Core Floating Point Speed
872 Pts 1048 Pts Faster multi-core fp speed.
+20%
Series
CPU Architecture
Kaby Lake (2017) Haswell-E (2014)
Socket
Motherboard Socket
FCLGA1151 LGA2011-V3
Graphics
Integrated Graphics
HD 630 None
Launch Date
Launch Date
Q1'17 Q3'14
Cache
Cache
8 MB 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
DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V DDR4 1333/1600/2133
Memory Channels
Max # of Memory Channels
2 4
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 630 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

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The Core i7-7700K is Intel’s flagship Kaby Lake based CPU which is reported to have the same IPC as its predecessor, Skylake. Comparing the 7700K and 6700K shows that both average effective speed and peak overclocked speed are up by 7%. Most of the increase in average effective speed is explained by the 5% boost in base clocks from 4.0 to 4.2 GHz. The improved peak lab speed is attributable to a combination of better overclocking capacity and improvements in Intel’s speedshift technology which make the 7700K slightly more responsive. Kaby Lake also has marginally better HD 630 integrated graphics. The i7-7700K is priced similarly to the i7-6700K so for top end gaming and workstation builds, the 7700K is the clear choice for 2017. AMD’s Ryzen will release later this year so things could change at that time. [Jan '17 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) February 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.

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CPUGPUSSD
Intel Core i7-8700K $330Nvidia GTX 1070 $430Samsung 850 Evo 250GB $87
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $285Samsung 850 Evo 500GB $146
AMD Ryzen 5 1600 $170AMD RX 480 $400Samsung 850 Pro 256GB $146
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $185SanDisk Extreme 64GB $50
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $200SanDisk Extreme 16GB $18
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