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 36,549 user samples
18,769 User Benchmarks
Best Bench: 113% Base clock 4.2 GHz, turbo 5.1 GHz (avg)
Worst Bench: 88% Base clock 4.2 GHz, turbo 1.8 GHz (avg)
Poor: 88% Great: 113%
SPEED RANK: 1st / 956
Gaming
Gaming 100%
UFO
Desktop
Desktop 101%
UFO
Workstation
Workstation 74%
Battleship
17,780 User Benchmarks
Best Bench: 104% Base clock 3.3 GHz, turbo 4.35 GHz (avg)
Worst Bench: 72% Base clock 3.3 GHz, turbo 0.2 GHz (avg)
Poor: 72% Great: 104%
SPEED RANK: 17th / 956
Gaming
Gaming 86%
Aircraft carrier
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 77%
Battleship
Effective Speed
Effective CPU Speed
101 % Faster effective speed.
+16%
86.3 % -16%
SC Mixed
Avg. Single Core Mixed Speed
140 Pts Much faster single-core speed.
+31%
107 Pts -31%
QC Mixed
Avg. Quad Core Mixed Speed
494 Pts Faster quad-core speed.
+17%
423 Pts -17%
MC Mixed
Avg. Multi Core Mixed Speed
755 Pts -16% 876 Pts Faster multi-core speed.
+16%
SC Mixed
OC Single Core Mixed Speed
155 Pts Faster OC single-core speed.
+19%
130 Pts -19%
QC Mixed
OC Quad Core Mixed Speed
565 Pts Slightly faster OC quad-core speed.
+10%
515 Pts -10%
MC Mixed
OC Multi Core Mixed Speed
840 Pts -26% 1057 Pts Faster OC multi-core speed.
+26%
Market Share
Based on 3,491,047 CPUs tested.
Market Share
Market Share (trailing 30 days)
4.2 % Hugely higher market share.
+500%
0.7 % -500%
Value
Value For Money
99.5 % Better value.
+30%
76.8 % -30%
User Rating
UBM User Rating
127 % Much more popular.
+69%
75 % -69%
Price
Price (score)
$300 Cheaper.
+25%
$399 -25%
Age
Newest
3 Months Hugely more recent.
+91%
32 Months -91%
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
4.2 GHz Faster base frequency.
+27%
3.3 GHz -27%
Turbo Clock
Turbo Clock Speed
4.5 GHz Faster turbo frequency.
+25%
3.6 GHz -25%
SC Int
Single Core Integer Speed
151 Pts Slightly faster single-core int speed.
+14%
133 Pts -14%
SC Float
Single Core Floating Point Speed
159 Pts Faster single-core fp speed.
+20%
133 Pts -20%
QC Int
Quad Core Integer Speed
558 Pts Slightly faster quad-core int speed.
+7%
523 Pts -7%
QC Float
Quad Core Floating Point Speed
583 Pts Slightly faster quad-core fp speed.
+11%
524 Pts -11%
MC Int
Multi Core Integer Speed
774 Pts -30% 1007 Pts Much faster multi-core int speed.
+30%
MC Float
Multi Core Floating Point Speed
882 Pts -21% 1068 Pts Faster multi-core fp speed.
+21%
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

More specs » More specs »
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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) April 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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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 i7-7700K $300Nvidia GTX 1070 $330Samsung 850 Evo 250GB $106
Intel Core i5-7600K $229AMD RX 480 $220Samsung 850 Pro 256GB $140
Intel Pentium G4560 $60Nvidia GTX 1060-6GB $219Samsung 850 Evo 500GB $170
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $122SanDisk Extreme 32GB $22
Seagate Barracuda 3TB (2016) $90G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 64GB $35
Seagate Barracuda 7200.14 1TB $46Corsair Vengeance LPX DDR4 3200 C16 2x8GB $137SanDisk Ultra Fit 32GB $9
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