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Intel BX80648I75820K

Core i7-5820K

▲ 669,879 ▼

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

Average Bench: 76.8% (281st of 1442)

Based on 101,694 user benchmarks.  Devices: BFEBFBFF000306F2, , 0F8BFBFF000306F2, 1FABFBFF000306F2 Model: Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz

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]

Poor: 68%Average: 76.8% Great: 88%
Gaming
Gaming 77%
Battleship
Desktop
Desktop 78%
Battleship
Workstation
Workstation 67%
Battle cruiser

Popular builds with this CPU

Good average bench

The Intel Core i7-5820K averaged 23.1% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Intel Core i7-5820K near the top of the comparison list.

Strengths

Avg. Memory Latency 86.4Pts
Avg. Quad Core Speed 364Pts

Very good consistency

The range of scores (95th - 5th percentile) for the Intel Core i7-5820K is just 19.9%. This is a relatively narrow range which indicates that the Intel Core i7-5820K performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. Multi Core Speed 748Pts
Avg. Octa Core Speed 594Pts
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Average Bench

(Based on 101,694 samples)
Rank 28176.8%
Min Avg Max
77.8 Memory 86.4 94
74.1 1-Core 96.3 120
159 2-Core 192 237
72.4% 125 Pts
Min Avg Max
299 4-Core 364 462
483 8-Core 594 737
58.6% 479 Pts
Min Avg Max
614 64-Core 748 933
46.3% 748 Pts
User Benchmarks BenchNormalHeavyServer
The fastest CPU (mainstream) averages a speed of 100%
SOCKET 2011, 1 CPU, 6 cores, 12 threads
Base clock 3.3 GHz, turbo 3.6 GHz (avg)
86% Excellent
Memory 94
1-Core 104
2-Core 214
79% 137 Pts
4-Core 420
8-Core 674
67% 547 Pts
64-Core 824
51% 824 Pts
SOCKET 2011, 1 CPU, 6 cores, 12 threads
Base clock 3.3 GHz, turbo 3.7 GHz (avg)
82.6% Excellent
Memory 84.6
1-Core 103
2-Core 217
76% 135 Pts
4-Core 433
8-Core 690
69% 562 Pts
64-Core 859
53% 859 Pts
SOCKET 2011, 1 CPU, 6 cores, 12 threads
Base clock 3.3 GHz, turbo 3.6 GHz (avg)
79.2% Very good
Memory 91.4
1-Core 101
2-Core 174
73% 122 Pts
4-Core 362
8-Core 568
57% 465 Pts
64-Core 796
49% 796 Pts
CPUSocket, 1 CPU, 6 cores, 12 threads
Base clock 3.3 GHz, turbo 3.25 GHz (avg)
75.4% Very good
Memory 81.7
1-Core 87.8
2-Core 190
69% 120 Pts
4-Core 372
8-Core 628
61% 500 Pts
64-Core 776
48% 776 Pts
SOCKET 0, 1 CPU, 6 cores, 12 threads
Base clock 3.3 GHz, turbo 3.1 GHz (avg)
74.4% Very good
Memory 85.8
1-Core 86.6
2-Core 172
68% 115 Pts
4-Core 340
8-Core 589
56% 465 Pts
64-Core 746
46% 746 Pts
CPUSocket, 1 CPU, 6 cores, 12 threads
Base clock 3.3 GHz, turbo 3.35 GHz (avg)
73.1% Very good
Memory 78.6
1-Core 93
2-Core 188
68% 120 Pts
4-Core 364
8-Core 607
59% 485 Pts
64-Core 749
46% 749 Pts
SOCKET 0, 1 CPU, 6 cores, 12 threads
Base clock 3.3 GHz, turbo 3.35 GHz (avg)
72.1% Very good
Memory 81.7
1-Core 94.2
2-Core 176
68% 117 Pts
4-Core 337
8-Core 554
54% 446 Pts
64-Core 752
46% 752 Pts
SOCKET 0, 1 CPU, 6 cores, 12 threads
Base clock 3.3 GHz, turbo 3.5 GHz (avg)
69% Good
Memory 74.3
1-Core 86.9
2-Core 185
65% 115 Pts
4-Core 343
8-Core 585
56% 464 Pts
64-Core 737
46% 737 Pts
SOCKET 2011, 1 CPU, 6 cores, 12 threads
Base clock 3.3 GHz, turbo 1.55 GHz (avg)
42.9% Average
Memory 61.2
1-Core 30.8
2-Core 64.5
35% 52.2 Pts
4-Core 134
8-Core 231
22% 183 Pts
64-Core 663
41% 663 Pts
101,694 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 67,751,657 CPUs tested

 Prices

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MSRP ≈ $389 @ launch in Aug '14
EbayUS $1303 mins
BHPhotoUS $3916 years
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Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

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CPU GPU SSD HDD RAM MBD
Typical Core i7-5820K Builds (Compare 1,982 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 45%
Yacht
Desktop
Desktop 82%
Aircraft carrier
Workstation
Workstation 41%
Speed boat

Motherboard: Asus X99-A - $240

CPU
Core i7-5820KIntel  $130Bench 77%, 101,694 samples1,232x
GPU
GTX 970Nvidia  $200Bench 49%, 834,238 samples171x
GTX 1080Nvidia  $400Bench 102%, 1,082,454 samples128x
RTX 3060Nvidia  $279Bench 100%, 447,556 samples109x
SSD
850 Evo 500GBSamsung  $94Bench 112%, 695,664 samples85x
970 Evo Plus NVMe PCIe M.2 1TBSamsung  $90Bench 310%, 455,997 samples63x
850 Evo 250GBSamsung  $100Bench 103%, 951,591 samples47x
RAM
Ballistix Sport DDR4 2400 C16 4x4GBCrucial  $84Bench 97%, 1,914 samples34x
Vengeance LPX DDR4 2666 C16 4x4GBCorsair  $115Bench 88%, 5,380 samples32x
16ATF1G64AZ-2G1A1 2x8GBMicronBench 68%, 1,302 samples27x
EDIT WITH CUSTOM PC BUILDER Value: 67% - Good Total price: $748

Popular Core i7-5820K compatible motherboards:

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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.

 Specifications

Essentials

DescriptionIntel® Core™ i7-5820K Processor (15M Cache, up to 3.60 GHz)
Code NameHaswell E
Launch DateQ3'14
Processor Numberi7-5820K
# of Cores6
# of Threads12
Cache15 MB SmartCache
Instruction Set64-bit
Instruction Set ExtensionsSSE4.2, AVX 2.0, AES
Embedded Options AvailableNo
Lithography22 nm
Recommended Price$389.00 - $396.00
Clock Speed3.3 GHz
Max Turbo Frequency3.6 GHz
Bus Speed0 GT/s
Scalability1S Only
Max TDP140 W

Graphics

Processor GraphicsNone

Memory

Max Memory Size64 GB
Memory TypesDDR4 1333/1600/2133
Memory Channels4
Memory Bandwidth68 GB/s
ECC Memory SupportedNo

Expansion Options

PCI Express Revision3.0
Max # of PCI Express Lanes28

Data Protection

AES New InstructionsYes

Advanced Technologies

Virtualization Tech (VT-x)Yes
Intel 64Yes
Idle StatesYes
Enhanced Intel SpeedStep® TechYes
Thermal Monitoring TechnologiesYes
Turbo Boost Tech2.0
Hyper-Threading TechYes
Virtualization for Directed I/O (VT-d)Yes
VT-x with Extended Page Tables (EPT)Yes
Demand Based SwitchingNo
vPro TechNo
Identity Protection TechYes
Smart Response TechYes

Package

Package Size52.5mm x 45.0mm
Max CPU Configuration1
Sockets SupportedLGA2011-v3

Platform Protection

Execute Disable BitYes
Trusted Execution TechNo

 Comments

CPUPro
Avatar level
2,072

Official site ark.intel.com/...

LGA2011-V3

Added 9 years ago.
USA-User
Avatar level
9,838

Excellent (edit your comment) Add link

8 months ago.

work fine, high tempeture only at hard work. pretty good at work from 2015-2020 time to change to 12900k but no way i can find memory ddr5 so it work until memory comes to me

Comment 

Amazing processor. just upgraded from an AMD FX 8350. It’s paired with an MSI x99a gaming pro carbon motherboard, 16gb Geil EVO x ram, and an AMD fury x. I’ve overclocked the CPU to 4.0ghz (haven’t felt the need to go faster), with a nzxt kraken x41 and my temps at idle are around 38*C and it never goes above 55*C when gaming. When I’m just messing around in windows or on the web, I haven’t noticed a difference from my fx8350, but gaming on CPU intensive games, this chip blows the former away. (GPU intensive games I couldn’t tell a difference, thank you fury x btw). I was trying to hold out until AMD released Zen, but I pulled the trigger and bought an i7. If I could do it over again, I would.—Nov '16

GBR-User
Avatar level
5,782

Good

1 month ago.

Compared to the 6800k, much better overclocked now Haswell-e is mature

CAN-User
Avatar level
4,958

Good

4 months ago.

Robust CPU, 4.2, 1.2 v, idle 30 top 65

IRN-User
Avatar level
3,956

Average

3 months ago.

daed 5820k not good Effective Speed

AUT-User
Avatar level
2,735

Excellent

4 years ago.

Absolutely Nice CPU! In Use with Asrock X99 extreme6/ac, and 16GB HyperX Fury DDRs 2444mhz Ram and an MSI GTX750 2GB DDR5!

NOR-User
Avatar level
2,290

Good

4 months ago.

Used it for many years, with a great motherboard it is still very capable of gaming and 200 web browsers.

CPUPro
Avatar level
2,072

Outstanding

9 years ago.

SGP-User
Avatar level
1,994

Terrible

6 years ago.

An excellent overclocker for its price, the additional two cores will be definitely beneficial for any video rendering or load heavy tasks.

CYP-User
Avatar level
1,354

Excellent

4 years ago.

Is super prossesor dont need say match take it

ECU-User
Avatar level
1,263

Excellent

4 years ago.

i had this processor with 4,3ghz OC and got me 1250 pt in cinebench R15 its beautifull

PAN-User
Avatar level
1,116

Excellent

2 years ago.

The people who bought this back then hit gold. Still relevant for gaming in 2022 and probably for a few more years too.

yaabalfazl
Avatar level
92

Terrible

6 years ago.

old

TecX
Avatar level
48

Outstanding

8 years ago.

Great cpu . Good value,exellent speed and overclocking . (My oc is 4.9 Ghz on costum water cooling)

Loken
Avatar level
6

Good

5 years ago.

This processor has server med very well and handles anything I throw it at with no issues. Easily clocks from 3.3 to 3.8 without any issues. I am watercooled however with corsair H110i.

kurtiskain
Avatar level
4

Excellent

4 years ago.

Great temperatures under HUGE overclock. (upwards of 25% ~4.5GHz!) Still stands strong in 2019. Cons - X99 platform, which means $$$

kamalvedad
Avatar level
2

Excellent

5 years ago.

Built it new around 2015. Currently running at 4.2Ghz @1.2v on air. Game temps are around 50-60 and 70 max in stress tests. I could go higher with better cooling I suppose.

dmoss409
Avatar level
2

Excellent

3 years ago.

Has held out since 2015 and still demolishes anything I throw at it.

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See how consistently different CPUs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

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 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $273Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $133Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $177Nvidia RTX 4070 $539Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $45SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37Corsair 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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