Intel Core i7-3820

Intel · Core

Core i7-3820

Released February 2012

A four-core Sandy Bridge-E desktop processor with Hyper-Threading, quad-channel DDR3 and 40 CPU PCIe lanes for LGA2011 systems.

Cores
4/8
Boost
3.8 GHz
L3
10 MB
Power
130 W
Socket
LGA2011

What reviewers say

Both reviews liked its encoding performance and cheaper route into X79, while questioning the platform cost for existing mainstream owners. TechSpot found disappointing gaming results; KitGuru’s ASRock Extreme4-M system showed little gaming difference from 2600K/2700K systems. Both achieved substantial overclocks despite its limited multiplier, but neither established a compelling gaming upgrade from those processors.

From kitguru.net, techspot.com, techspot.com, techspot.com, techspot.com, techspot.com, techspot.com, techspot.com, techspot.com, techspot.com and techspot.com

Cores and clocks

Cores
4
Threads
8
Base clock
3.6 GHz
Boost clock
3.8 GHz
L3 cache
10 MB
Cores
Four cores and eight threads; Sandy Bridge-E with Hyper-Threading. The multiplier is only partly unlocked, as both exact reviews explain; unlocked is false here because it is not fully unlocked.
Clocks
Turbo Boost 2.0 up to 3.80 GHz from Intel’s current sheet; KitGuru’s engineering-sample review table instead states 3.90 GHz. Intel staff acknowledged release in February 2012; month precision is retained rather than treating the forum’s proposed day as verified sale.
Cache
10 MB Intel Smart Cache; L3 level confirmed by both exact reviews.

Graphics and AI

Built-in graphics
No
Graphics
No integrated graphics or Quick Sync, confirmed by KitGuru’s exact-model review.

Platform

Socket
LGA2011
Base power
130 W
Unlocked
No
Cooler in the box
No
Memory support
Four channels of DDR3-1066/1333/1600; 51.2 GB/s maximum published bandwidth; no ECC. Intel’s anomalous 64.23 GB maximum-memory value is not normalised into a guessed capacity.
PCIe
40 CPU lanes; Intel’s current sheet lists PCIe 2.0, while both contemporary reviews describe PCIe 3.0 capability. The manufacturer’s current literal figure is retained with this conflict explicit.
Chipsets
Intel X79; LGA2011.
Process
32 nm; Sandy Bridge-E.
Cooler
Exact BX80619I73820 Newegg listing states cooling device not included. Intel gives a case-temperature limit of 66.8°C.

Pros and cons

Pros

  • Four cores and eight threads
  • Quad-channel DDR3 support
  • 40 CPU PCIe lanes

Cons

  • No integrated graphics
  • Core multiplier is only partly unlocked
  • Requires an LGA2011 motherboard

Closest rivals

Model
CoresBoostL3PowerSocketReleased
4/83.9 GHz10 MB130 WLGA2011Sept 2013
4/43.8 GHz6 MB77 WLGA1155Apr 2012
4/83.9 GHz8 MB77 WLGA1155Apr 2012

Sources

  1. intel.com/content/www/us/en/products/sku/63698/intel-core-i73820-processor-10m-…
  2. community.intel.com/t5/Mobile-and-Desktop-Processors/i7-3820/m-p/420283
  3. kitguru.net/components/cpu/zardon/intel-core-i7-3820-and-asrock-extreme4-m-revi…
  4. techspot.com/review/492-intel-core-i7-3820
  5. newegg.com/intel-core-i7-3rd-gen-core-i7-3820-sandy-bridge-e-lga-2011-desktop-p…

Photo: Newegg exact BX80619I73820 retail-box photograph with i7-3820 and LGA2011 visible; original printed wording and white background retained.

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