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IntelBX80673I97940X
IntelBX80648I75820K
▲ 52146 ▼

14 Cores, 28 Threads @3.10 GHz, Skylake.
Release date ≈ Q4 2017.

VS
▲ 669,879 ▼

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

Effective Speed 
+8%
Real World Speed
Performance profile from 106,254 user samples
Benchmark your CPU here
4,560 User Benchmarks
Best Bench: 95% Base clock 3.1 GHz, turbo 4.55 GHz (avg)
Worst Bench: 73% Base clock 3.1 GHz, turbo 0.6 GHz (avg)
Poor: 73% Great: 95%
SPEED RANK: 205th / 1456
Gaming
Gaming 83%
Aircraft carrier
Desktop
Desktop 84%
Aircraft carrier
Workstation
Workstation 100%
Nuclear submarine
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: 289th / 1456
Gaming
Gaming 77%
Battleship
Desktop
Desktop 78%
Battleship
Workstation
Workstation 67%
Battle cruiser
Effective Speed
Effective CPU Speed 		83.3 % Slightly faster effective speed.
+8% 		76.8 %
Average Score 
+27%
Memory
Avg. Memory Latency 		76.5 Pts 86.4 Pts Lower memory latency.
+13%
1-Core
Avg. Single Core Speed 		124 Pts Faster single-core speed.
+29% 		96.3 Pts
2-Core
Avg. Dual Core Speed 		246 Pts Faster dual-core speed.
+28% 		192 Pts
4-Core
Avg. Quad Core Speed 		482 Pts Much faster quad-core speed.
+32% 		364 Pts
8-Core
Avg. Octa Core Speed 		947 Pts Much faster octa-core speed.
+59% 		594 Pts
Overclocked Score 
+21%
Memory
OC Memory Latency 		88.6 Pts 94 Pts Slightly lower OC memory latency.
+6%
1-Core
OC Single Core Speed 		141 Pts Faster OC single-core speed.
+18% 		120 Pts
2-Core
OC Dual Core Speed 		282 Pts Faster OC dual-core speed.
+19% 		237 Pts
4-Core
OC Quad Core Speed 		561 Pts Faster OC quad-core speed.
+21% 		462 Pts
8-Core
OC Octa Core Speed 		1112 Pts Much faster OC octa-core speed.
+51% 		737 Pts
Value & Sentiment 
+363%
Market Share
Based on 68,124,465 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.14 % Insanely higher market share.
+1,300%
Value
Value For Money 		66 % 94.7 % Much better value.
+43%
User Rating
UBM User Rating 		52 % 66 % More popular.
+27%
Price
Price (score) 		$647 $130 Much cheaper.
+80%
Nice To Haves 
+135%
Age
Newest 		80+ Months Much more recent.
+32% 		118 Months
64-Core
OC Multi Core Speed 		2625 Pts Hugely faster OC 64-core speed.
+181% 		933 Pts
64-Core
Avg. Multi Core Speed 		2179 Pts Hugely faster 64-core speed.
+191% 		748 Pts
Specifications 
Launch Date
Launch Date 		Q3'17 Q3'14
Cache
Cache 		19.25 MB 15 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions 		SSE4.1/4.2, AVX2, AVX-512 SSE4.2, AVX 2.0, AES
Recommended Price
Recommended Customer Price 		$1387.00 - $1399.00 $389.00 - $396.00
Max Turbo Frequency
Max Turbo Frequency 		4.30 GHz 3.6 GHz
Bus Speed
Bus Speed 		8 GT/s DMI3 0 GT/s
Max Memory Size
Max Memory Size (dependent on memory type) 		128 GB 64 GB
Memory Types
Memory Types 		DDR4-2666 DDR4 1333/1600/2133
Max # of PCI Express Lanes
Max # of PCI Express Lanes 		44 28

More specs » More specs »
Conclusion 
Average Bench 83.3%
Average Bench 76.8%
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Guys, this is for workstation, not gaming. [Oct '21 Gamejang]

MORE DETAILS

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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