IntelBX80648I75820K
IntelBX80662I56600K

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

Real World Speed
Performance profile from 113,425 user samples
26,864 User Benchmarks
Best Bench: 105% Base clock 3.3 GHz, turbo 3.8 GHz (avg)
Worst Bench: 73% Base clock 3.3 GHz
Poor: 73% Great: 105%
SPEED RANK: 32nd / 980
Gaming
Gaming 87%
Aircraft carrier
Desktop
Desktop 84%
Aircraft carrier
Workstation
Workstation 76%
Battleship
86,561 User Benchmarks
Best Bench: 108% Base clock 3.5 GHz
Worst Bench: 69% Base clock 3.5 GHz, turbo 0.75 GHz (avg)
Poor: 69% Great: 108%
SPEED RANK: 27th / 980
Gaming
Gaming 90%
Aircraft carrier
Desktop
Desktop 87%
Aircraft carrier
Workstation
Workstation 54%
Yacht
Effective Speed
Effective CPU Speed
86.9 % -3% 89.7 % +3%
SC Mixed
Avg. Single Core Mixed Speed
108 Pts -14% 123 Pts Slightly faster single-core speed.
+14%
QC Mixed
Avg. Quad Core Mixed Speed
427 Pts -9% 466 Pts Slightly faster quad-core speed.
+9%
MC Mixed
Avg. Multi Core Mixed Speed
865 Pts Hugely faster multi-core speed.
+82%
476 Pts -82%
SC Mixed
OC Single Core Mixed Speed
132 Pts -10% 145 Pts Slightly faster OC single-core speed.
+10%
QC Mixed
OC Quad Core Mixed Speed
523 Pts -8% 567 Pts Slightly faster OC quad-core speed.
+8%
MC Mixed
OC Multi Core Mixed Speed
1043 Pts Hugely faster OC multi-core speed.
+82%
572 Pts -82%
Market Share
Based on 5,492,308 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.47 % -266% 1.72 % Hugely higher market share.
+266%
Value
Value For Money
77.9 % -29% 100 % Better value.
+29%
User Rating
UBM User Rating
81 % -30% 105 % More popular.
+30%
Price
Price (score)
$391 -44% $217 Much cheaper.
+44%
Age
Newest
38 Months -32% 26 Months Much more recent.
+32%
TDP
Thermal Design Power (TDP)
140 Watts -35% 91 Watts Much more energy efficient.
+35%
Cores
CPU Processing Cores
6 cores Much higher core count.
+50%
4 cores -50%
Threads
CPU Processing Threads
12 threads Hugely higher thread count.
+200%
4 threads -200%
Lithography
Manufacturing process
22 nm -36% 14 nm Much newer manufacturing.
+36%
Base Clock
Base Clock Speed
3.3 GHz -6% 3.5 GHz Slightly faster base frequency.
+6%
Turbo Clock
Turbo Clock Speed
3.6 GHz -8% 3.9 GHz Slightly faster turbo frequency.
+8%
SC Int
Single Core Integer Speed
133 Pts -6% 141 Pts Slightly faster single-core int speed.
+6%
SC Float
Single Core Floating Point Speed
132 Pts -13% 149 Pts Slightly faster single-core fp speed.
+13%
QC Int
Quad Core Integer Speed
521 Pts -6% 552 Pts Slightly faster quad-core int speed.
+6%
QC Float
Quad Core Floating Point Speed
522 Pts -12% 587 Pts Slightly faster quad-core fp speed.
+12%
MC Int
Multi Core Integer Speed
987 Pts Much faster multi-core int speed.
+78%
556 Pts -78%
MC Float
Multi Core Floating Point Speed
1061 Pts Much faster multi-core fp speed.
+80%
590 Pts -80%
Series
CPU Architecture
Haswell-E (2014) Skylake (2015)
Socket
Motherboard Socket
LGA2011-V3 FCLGA1151
Graphics
Integrated Graphics
None HD 530
Launch Date
Launch Date
Q3'14 Q3'15
Cache
Cache
15 MB SmartCache 6 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.2, AVX 2.0, AES SSE4.1/4.2, AVX 2.0
Lithography
Lithography
22 nm 14 nm
Recommended Price
Recommended Customer Price
$389.00 - $396.00 $242.00 - $243.00
Bus Speed
Bus Speed
0 GT/s 8 GT/s DMI3
Memory Types
Memory Types
DDR4 1333/1600/2133 DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
Memory Channels
Max # of Memory Channels
4 2
Memory Bandwidth
Max Memory Bandwidth
68 GB/s 34.1 GB/s
Processor Graphics
Processor Graphics ‡
None Intel® HD Graphics 530
Package Size
Package Size
52.5mm x 45.0mm 37.5mm x 37.5mm
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
Max # of PCI Express Lanes
Max # of PCI Express Lanes
28 16

More specs » More specs »
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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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The Intel Core i5-6600K is based on the new "Skylake" 14nm manufacturing process. Sporting 4 physical cores with base/turbo clocks of 3.5/3.9 GHz the 6600K and its predecessor, the 4690K share the same basic configuration and disappointingly, offer similar performance. Comparing the 6600K and 6700K shows that the 6700K has faster multi and single core performance. The improved multi core performance is due to Hyperthreading which is the key differentiator for the i7-6700K. The gap in single core performance can largely be eliminated by overclocking the i5-6600K so although the stock effective speed is significantly higher on the 6700K, this gap diminishes significantly when both processors are overclocked. At a 30% discount, the 6600K is the better value gaming CPU. [Aug '15 CPUPro]

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Processor Rankings (Price vs Performance) October 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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  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
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  • - 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.
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HDDRAMUSB
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