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Intel
IntelBX80648I75820K
▲ 53291 ▼

2 Cores, @3.16 GHz, Wolfdale.
Release date ≤ Q4 2013.

VS
▲ 669,880 ▼

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

Effective Speed 
+84%
Real World Speed
Performance profile from 120,535 user samples
Benchmark your CPU here
18,841 User Benchmarks
Best Bench: 48% Base clock 3.15 GHz, turbo 2.95 GHz (avg)
Worst Bench: 28% Base clock 3.15 GHz, turbo 2.95 GHz (avg)
Poor: 28% Great: 48%
SPEED RANK: 1035th / 1464
Gaming
Gaming 42%
Speed boat
Desktop
Desktop 48%
Yacht
Workstation
Workstation 28%
Raft
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: 297th / 1464
Gaming
Gaming 77%
Battleship
Desktop
Desktop 78%
Battleship
Workstation
Workstation 67%
Battle cruiser
Effective Speed
Effective CPU Speed 		41.9 % 76.8 % Hugely faster effective speed.
+84%
Average Score 
+235%
Memory
Avg. Memory Latency 		69.5 Pts 86.4 Pts Lower memory latency.
+24%
1-Core
Avg. Single Core Speed 		45.2 Pts 96.3 Pts Hugely faster single-core speed.
+113%
2-Core
Avg. Dual Core Speed 		83.3 Pts 192 Pts Hugely faster dual-core speed.
+130%
4-Core
Avg. Quad Core Speed 		85.2 Pts 364 Pts Hugely faster quad-core speed.
+327%
8-Core
Avg. Octa Core Speed 		87.5 Pts 594 Pts Hugely faster octa-core speed.
+579%
Overclocked Score 
+255%
Memory
OC Memory Latency 		80 Pts 94 Pts Lower OC memory latency.
+18%
1-Core
OC Single Core Speed 		51.2 Pts 120 Pts Hugely faster OC single-core speed.
+134%
2-Core
OC Dual Core Speed 		101 Pts 237 Pts Hugely faster OC dual-core speed.
+135%
4-Core
OC Quad Core Speed 		101 Pts 462 Pts Hugely faster OC quad-core speed.
+357%
8-Core
OC Octa Core Speed 		101 Pts 737 Pts Hugely faster OC octa-core speed.
+630%
Value & Sentiment 
+421%
Market Share
Based on 68,801,920 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.17 % Insanely higher market share.
+1,600%
Value
Value For Money 		54 % 94.7 % Much better value.
+75%
User Rating
UBM User Rating 		53 % 66 % More popular.
+25%
Price
Price (score) 		$110 Cheaper.
+15% 		$130
Nice To Haves 
+528%
Age
Newest 		130+ Months 122 Months Slightly more recent.
+6%
64-Core
OC Multi Core Speed 		102 Pts 933 Pts Hugely faster OC 64-core speed.
+815%
64-Core
Avg. Multi Core Speed 		86.8 Pts 748 Pts Hugely faster 64-core speed.
+762%
Specifications 
Launch Date
Launch Date 		Q1'08 Q3'14
Cache
Cache 		6 MB L2 15 MB SmartCache
Lithography
Lithography 		45 nm 22 nm
Recommended Price
Recommended Customer Price 		$200.00 $389.00 - $396.00
Bus Speed
Bus Speed 		1333 MHz FSB 0 GT/s
Package Size
Package Size 		37.5mm x 37.5mm 52.5mm x 45.0mm
Turbo Boost Tech
Intel® Turbo Boost Technology ‡ 		No 2.0
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡ 		No Yes
AES New Instructions
Intel® AES New Instructions 		No Yes
Trusted Execution Tech
Intel® Trusted Execution Technology ‡ 		Yes No

More specs » More specs »
Conclusion 
Average Bench 41.9%
Average Bench 76.8%

Beast processor during its time, when single core performance was king, but also software support, starting with Windows itself, was a major factor, it's crazy because all the benches at the time showed the e8500 beating the Phenom II 965 in gaming( the reason I was building a system) at the time, especially when it came to OC. Crazy what the benches are now, if you have Phenom II now with a mobo that works it may be useful (but they aren't very power efficient) but I burnt my mobo out overclocking so the point of what either processor could do 5 much less 10 years later is pretty moot. [Feb '21 qnytech1]

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]

MORE DETAILS

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