IntelBX80648I75820K
IntelBX80677I77700K

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

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

Real World Speed
Performance profile from 138,494 user samples
29,723 User Benchmarks
Best Bench: 105% Base clock 3.3 GHz, turbo 4.6 GHz (avg)
Worst Bench: 72% Base clock 3.3 GHz, turbo 1.2 GHz (avg)
Poor: 72% Great: 105%
SPEED RANK: 33rd / 980
Gaming
Gaming 86%
Aircraft carrier
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 75%
Battleship
108,771 User Benchmarks
Best Bench: 112% Base clock 4.2 GHz, turbo 5 GHz (avg)
Worst Bench: 85% Base clock 4.2 GHz, turbo 1.8 GHz (avg)
Poor: 85% Great: 112%
SPEED RANK: 15th / 980
Gaming
Gaming 99%
Nuclear submarine
Desktop
Desktop 100%
Nuclear submarine
Workstation
Workstation 73%
Battleship
Effective Speed
Effective CPU Speed
85.9 % -15% 99.1 % Faster effective speed.
+15%
SC Mixed
Avg. Single Core Mixed Speed
107 Pts -30% 139 Pts Faster single-core speed.
+30%
QC Mixed
Avg. Quad Core Mixed Speed
422 Pts -15% 486 Pts Faster quad-core speed.
+15%
MC Mixed
Avg. Multi Core Mixed Speed
854 Pts Faster multi-core speed.
+16%
739 Pts -16%
SC Mixed
OC Single Core Mixed Speed
132 Pts -17% 155 Pts Faster OC single-core speed.
+17%
QC Mixed
OC Quad Core Mixed Speed
522 Pts -8% 565 Pts Slightly faster OC quad-core speed.
+8%
MC Mixed
OC Multi Core Mixed Speed
1032 Pts Faster OC multi-core speed.
+25%
828 Pts -25%
Market Share
Based on 6,328,963 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.47 % -711% 3.81 % Hugely higher market share.
+711%
Value
Value For Money
78.6 % -28% 101 % Better value.
+28%
User Rating
UBM User Rating
81 % -101% 163 % Hugely more popular.
+101%
Price
Price (score)
$370 -24% $280 Cheaper.
+24%
Age
Newest
40 Months -72% 11 Months Much more recent.
+72%
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 Much higher thread count.
+50%
8 threads -50%
Lithography
Manufacturing process
22 nm -36% 14 nm Much newer manufacturing.
+36%
Base Clock
Base Clock Speed
3.3 GHz -27% 4.2 GHz Faster base frequency.
+27%
Turbo Clock
Turbo Clock Speed
3.6 GHz -25% 4.5 GHz Faster turbo frequency.
+25%
SC Int
Single Core Integer Speed
130 Pts -17% 152 Pts Faster single-core int speed.
+17%
SC Float
Single Core Floating Point Speed
133 Pts -19% 158 Pts Faster single-core fp speed.
+19%
QC Int
Quad Core Integer Speed
516 Pts -6% 547 Pts Slightly faster quad-core int speed.
+6%
QC Float
Quad Core Floating Point Speed
523 Pts -11% 580 Pts Slightly faster quad-core fp speed.
+11%
MC Int
Multi Core Integer Speed
983 Pts Faster multi-core int speed.
+29%
763 Pts -29%
MC Float
Multi Core Floating Point Speed
1050 Pts Faster multi-core fp speed.
+20%
874 Pts -20%
Series
CPU Architecture
Haswell-E (2014) Kaby Lake (2017)
Socket
Motherboard Socket
LGA2011-V3 FCLGA1151
Graphics
Integrated Graphics
None HD 630
Launch Date
Launch Date
Q3'14 Q1'17
Cache
Cache
15 MB SmartCache 8 MB
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 $339.00 - $350.00
Bus Speed
Bus Speed
0 GT/s 8 GT/s DMI3
Memory Types
Memory Types
DDR4 1333/1600/2133 DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V
Memory Channels
Max # of Memory Channels
4 2
Processor Graphics
Processor Graphics ‡
None Intel® HD Graphics 630
Package Size
Package Size
52.5mm x 45.0mm 37.5mm x 37.5mm
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 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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Processor Rankings (Price vs Performance) December 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 $280Nvidia GTX 1070 $410Samsung 850 Evo 250GB $85
AMD Ryzen 7 1700 $294AMD RX 480 $265Samsung 850 Pro 256GB $110
Intel Core i5-7600K $210Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $140
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $215SanDisk Ultra Fit 32GB $10
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