IntelBX80648I75820K
IntelBX80684I58600K

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

6 Cores, 6 Threads
@3.6GHz Coffee Lake (2017)

Real World Speed
Performance profile from 55,059 user samples
33,025 User Benchmarks
Best Bench: 104% Base clock 3.35 GHz, turbo 4.6 GHz (avg)
Worst Bench: 70% Base clock 3.3 GHz, turbo 0.2 GHz (avg)
Poor: 70% Great: 104%
SPEED RANK: 46th / 1083
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 82%
Aircraft carrier
Workstation
Workstation 75%
Battleship
22,034 User Benchmarks
Best Bench: 121% Base clock 3.6 GHz, turbo 5.4 GHz (avg)
Worst Bench: 93% Base clock 3.6 GHz, turbo 1.15 GHz (avg)
Poor: 93% Great: 121%
SPEED RANK: 11th / 1083
Gaming
Gaming 104%
UFO
Desktop
Desktop 100%
UFO
Workstation
Workstation 76%
Battleship
Effective Speed
Effective CPU Speed
85 % 104 % Faster effective speed.
+23%
SC Mixed
Avg. Single Core Mixed Speed
106 Pts 136 Pts Faster single-core speed.
+28%
QC Mixed
Avg. Quad Core Mixed Speed
417 Pts 531 Pts Faster quad-core speed.
+27%
MC Mixed
Avg. Multi Core Mixed Speed
846 Pts Slightly faster multi-core speed.
+10%
772 Pts
SC Mixed
OC Single Core Mixed Speed
130 Pts 157 Pts Faster OC single-core speed.
+21%
QC Mixed
OC Quad Core Mixed Speed
515 Pts 618 Pts Faster OC quad-core speed.
+20%
MC Mixed
OC Multi Core Mixed Speed
1023 Pts Slightly faster OC multi-core speed.
+14%
900 Pts
Market Share
Based on 8,410,831 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.37 % 1.5 % Hugely higher market share.
+305%
Value
Value For Money
79.4 % 112 % Much better value.
+42%
User Rating
UBM User Rating
82 % 130 % Much more popular.
+59%
Price
Price (score)
$350 $239 Much cheaper.
+32%
Age
Newest
44 Months 6 Months Hugely more recent.
+86%
TDP
Thermal Design Power (TDP)
140 Watts 95 Watts Much more energy efficient.
+32%
Cores
CPU Processing Cores
6 cores 6 cores
Threads
CPU Processing Threads
12 threads Hugely higher thread count.
+100%
6 threads
Lithography
Manufacturing process
22 nm 14 nm Much newer manufacturing.
+36%
Base Clock
Base Clock Speed
3.3 GHz 3.6 GHz Slightly faster base frequency.
+9%
Turbo Clock
Turbo Clock Speed
3.6 GHz 4.3 GHz Faster turbo frequency.
+19%
SC Int
Single Core Integer Speed
130 Pts 152 Pts Faster single-core int speed.
+17%
SC Float
Single Core Floating Point Speed
129 Pts 162 Pts Faster single-core fp speed.
+26%
QC Int
Quad Core Integer Speed
509 Pts 599 Pts Faster quad-core int speed.
+18%
QC Float
Quad Core Floating Point Speed
513 Pts 649 Pts Faster quad-core fp speed.
+27%
MC Int
Multi Core Integer Speed
971 Pts Slightly faster multi-core int speed.
+12%
870 Pts
MC Float
Multi Core Floating Point Speed
1039 Pts Slightly faster multi-core fp speed.
+9%
956 Pts
Series
CPU Architecture
Haswell-E (2014) Coffee Lake (2017)
Socket
Motherboard Socket
LGA2011-V3 FCLGA1151
Graphics
Integrated Graphics
None UHD 630
Launch Date
Launch Date
Q3'14 Q4'17
Cache
Cache
15 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.2, AVX 2.0, AES SSE4.1/4.2, AVX2
Lithography
Lithography
22 nm 14 nm
Recommended Price
Recommended Customer Price
$389.00 - $396.00 N/A
Bus Speed
Bus Speed
0 GT/s 8 GT/s DMI3
Memory Types
Memory Types
DDR4 1333/1600/2133 DDR4-2666
Memory Channels
Max # of Memory Channels
4 2
Processor Graphics
Processor Graphics ‡
None Intel® UHD Graphics 630
Package Size
Package Size
52.5mm x 45.0mm 37.5mm x 37.5mm
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
vPro Tech
Intel® vPro™ Technology ‡
No Yes
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
No Yes
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 unlocked hex-core i5-8600K from Intel’s latest Coffee Lake generation of processors is the new flagship of the i5 series, succeeding the Kaby Lake quad-core i5-7600K. The 8th generation of processors brings the largest performance uplift since Sandy Bridge by adding more cores at each of the i3, i5 and i7 product lines. Like the other Coffee Lake processors, the i5-8600K is built upon optimized 14nm architecture, marginally improved upon from Kaby Lake and Skylake. The 8600K has a 95W TDP and a nominal stock clock of 3.6 GHz, which boosts to 4.1 GHz for all six cores, 4.2 GHz for dual/quad and 4.3 GHz for single core. Early benchmarks put the i5-8600K’s effective speed 15% ahead of the i5-7600K. A 50% increase in multi-core speed is explained by two additional cores and thanks to the quad-core clock bump from 4 GHz on the 7600K to 4.2 GHz on the 8600K there is also an additional 5% performance boost across all workloads. All Coffee Lake processors require a 300-series chipset, making a straight CPU upgrade unfeasible despite sharing the same socket as their Z270 predecessors. Even though most games still use less than 4 cores simultaneously, the i5-8600K is a great choice for gamers (especially streamers) but for $80 less, the 8350K which is faster than last years 7600K and only marginally weaker for gaming than the 8600K is certainly well worth considering as well. [Oct '17 CPUPro]

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Processor Rankings (Price vs Performance) April 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.
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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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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
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HDDRAMUSB
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