IntelBX80648I75820K
IntelBX80684I99900K

6 Cores, 12 Threads @3.3GHz, Haswell-E.
Release date: Q3 2014.

8 Cores, 16 Threads @3.6GHz, Coffee Lake.
Release date: Q4 2018.

Real World Speed
Performance profile from 455,917 user samples
101,694 User Benchmarks
Best Bench: 88% Base clock 3.3 GHz, turbo 4.6 GHz (avg)
Worst Bench: 68% Base clock 3.3 GHz, turbo 1.2 GHz (avg)
Poor: 68% Great: 88%
SPEED RANK: 281st / 1442
Gaming
Gaming 77%
Battleship
Desktop
Desktop 78%
Battleship
Workstation
Workstation 67%
Battle cruiser
354,223 User Benchmarks
Best Bench: 104% Base clock 3.6 GHz, turbo 5.2 GHz (avg)
Worst Bench: 89% Base clock 3.6 GHz, turbo 1.3 GHz (avg)
Poor: 89% Great: 104%
SPEED RANK: 90th / 1442
Gaming
Gaming 98%
Nuclear submarine
Desktop
Desktop 98%
Nuclear submarine
Workstation
Workstation 97%
Nuclear submarine
Effective Speed
Effective CPU Speed
76.8 % 97.9 % Faster effective speed.
+27%
Memory
Avg. Memory Latency
86.4 Pts 93.1 Pts Slightly lower memory latency.
+8%
1-Core
Avg. Single Core Speed
96.3 Pts 142 Pts Much faster single-core speed.
+47%
2-Core
Avg. Dual Core Speed
192 Pts 281 Pts Much faster dual-core speed.
+46%
4-Core
Avg. Quad Core Speed
364 Pts 551 Pts Much faster quad-core speed.
+51%
8-Core
Avg. Octa Core Speed
594 Pts 981 Pts Much faster octa-core speed.
+65%
Memory
OC Memory Latency
94 Pts 97.2 Pts +3%
1-Core
OC Single Core Speed
120 Pts 153 Pts Faster OC single-core speed.
+28%
2-Core
OC Dual Core Speed
237 Pts 305 Pts Faster OC dual-core speed.
+29%
4-Core
OC Quad Core Speed
462 Pts 604 Pts Much faster OC quad-core speed.
+31%
8-Core
OC Octa Core Speed
737 Pts 1116 Pts Much faster OC octa-core speed.
+51%
Market Share
Based on 67,714,166 CPUs tested
Market Share
Market Share (trailing 30 days)
0.15 % 1.13 % Hugely higher market share.
+653%
Value
Value For Money
94.7 % Slightly better value.
+8%
87.9 %
User Rating
UBM User Rating
66 % 86 % Much more popular.
+30%
Price
Price (score)
$130 Much cheaper.
+68%
$412
Age
Newest
116 Months 66 Months Much more recent.
+43%
TDP
Thermal Design Power (TDP)
140 Watts 95 Watts Much more energy efficient.
+32%
Cores
CPU Processing Cores
6 cores 8 cores Much higher core count.
+33%
Threads
CPU Processing Threads
12 threads 16 threads Much higher thread count.
+33%
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 5 GHz Much faster turbo frequency.
+39%
64-Core
OC Multi Core Speed
933 Pts 1590 Pts Much faster OC 64-core speed.
+70%
64-Core
Avg. Multi Core Speed
748 Pts 1451 Pts Hugely faster 64-core speed.
+94%
Series
CPU Architecture
Haswell-E Coffee Lake
Socket
Motherboard Socket
LGA2011-V3 FCLGA1151
Graphics
Integrated Graphics
None UHD 630
Launch Date
Launch Date
Q3'14 Q4'18
Cache
Cache
15 MB SmartCache 16 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.2, AVX 2.0, AES Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
Lithography
Lithography
22 nm 14 nm
Recommended Price
Recommended Customer Price
$389.00 - $396.00 $488.00 - $499.00
Max Turbo Frequency
Max Turbo Frequency
3.6 GHz 5.00 GHz
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
Memory Bandwidth
Max Memory Bandwidth
68 GB/s 41.6 GB/s
Processor Graphics
Processor Graphics ‡
None Intel® UHD Graphics 630
Package Size
Package Size
52.5mm x 45.0mm 37.5mm x 37.5mm
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]

MORE DETAILS

The Intel i9-9900K is an 8 core, 16 thread, unlocked 9th generation Coffee Lake processor. It has a base / boost clocks of 3.6 / 4.7 GHz and a single-core boost of 5.0 GHz (the highest frequency achieved yet from this class of Intel CPU). It features 16 MB of cache, a 95W TDP and Intel UHD 630 graphics. The 9900K is compatible with the new Z390 chipset, and subject to a BIOS update, is also compatible with the older Z370 chipset. Aimed at users who do not wish to compromise, the i9-9900K offers the best gaming and desktop experience available at any price. Heavy workstation users should consider the Ryzen 9 3900X which is similarly priced. Comparing the overclocked 3900X shows that it is just 10% worse for gaming and desktop (sub octa-core) but around 40% better for 64-core computations. Gamers should consider the 9700K which offers identical overclocked gaming performance at a $100 USD discount. [Oct '18 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) April 2024 CPU Rankings

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. 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.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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Welcome to our 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 value for money upgrades.

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 Frequently Asked Questions

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CPUGPUSSD
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Intel Core i5-12400F $134Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $184Nvidia RTX 4070 $409Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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