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 15,867 user samples
777 User Benchmarks
Best Bench: 120% Base clock 4.2 GHz, turbo 5 GHz (avg)
Worst Bench: 94% Base clock 4.2 GHz, turbo 0.8 GHz (avg)
Poor: 94% Great: 120%
SPEED RANK: 2nd / 934
Gaming
Gaming 106%
UFO
Desktop
Desktop 106%
UFO
Workstation
Workstation 77%
Battleship
15,090 User Benchmarks
Best Bench: 113% Base clock 3.3 GHz, turbo 4.7 GHz (avg)
Worst Bench: 79% Base clock 3.3 GHz, turbo 1.2 GHz (avg)
Poor: 79% Great: 113%
SPEED RANK: 9th / 934
Gaming
Gaming 94%
Nuclear submarine
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 80%
Battleship
Effective Speed
Effective CPU Speed
106 % Slightly faster effective speed.
+13%
93.6 % -13%
SC Mixed
Avg. Single Core Mixed Speed
140 Pts Much faster single-core speed.
+32%
106 Pts -32%
QC Mixed
Avg. Quad Core Mixed Speed
495 Pts Faster quad-core speed.
+18%
420 Pts -18%
MC Mixed
Avg. Multi Core Mixed Speed
751 Pts -15% 865 Pts Faster multi-core speed.
+15%
SC Mixed
OC Single Core Mixed Speed
155 Pts Faster OC single-core speed.
+18%
131 Pts -18%
QC Mixed
OC Quad Core Mixed Speed
577 Pts Slightly faster OC quad-core speed.
+13%
512 Pts -13%
MC Mixed
OC Multi Core Mixed Speed
836 Pts -26% 1052 Pts Faster OC multi-core speed.
+26%
Market Share
Based on 2,606,311 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.6 % -17% 0.7 % Higher market share.
+17%
Value
Value For Money
101 % Better value.
+21%
84 % -21%
User Rating
UBM User Rating
79 % +4% 76 % -4%
Price
Price (score)
$330 Cheaper.
+15%
$390 -15%
Age
Newest
0 Months Hugely more recent.
+100%
29 Months -100%
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
160 Pts Faster single-core fp speed.
+21%
132 Pts -21%
QC Int
Quad Core Integer Speed
565 Pts Slightly faster quad-core int speed.
+8%
523 Pts -8%
QC Float
Quad Core Floating Point Speed
592 Pts Slightly faster quad-core fp speed.
+13%
524 Pts -13%
MC Int
Multi Core Integer Speed
777 Pts -29% 1000 Pts Faster multi-core int speed.
+29%
MC Float
Multi Core Floating Point Speed
884 Pts -21% 1067 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 architecture is due for 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) January 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. 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.

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The Best.
CPUGPUSSD
Intel Core i7-6700K $330Nvidia GTX 1070 $376Samsung 850 Evo 250GB $98
Intel Core i5-6600K $220AMD RX 480 $200Samsung 850 Pro 256GB $120
Intel Core i7-4790K $339Nvidia GTX 1060-6GB $250Samsung 850 Evo 500GB $165
HDDRAMUSB
Seagate Barracuda 7200.14 1TB $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $103SanDisk Extreme 64GB $28
WD Black 6TB (2015) $270G.SKILL Trident Z DDR4 3200 C16 2x8GB $122SanDisk Extreme 32GB $21
WD Blue 1TB (2012) $50G.SKILL Trident Z DDR4 3200 C14 4x16GB $545SanDisk Extreme 16GB $16
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