Home Processors Intel Core i7-5820K Intel · Core
Released August 2014
An unlocked six-core Haswell-E desktop processor with quad-channel DDR4 memory and 28 PCIe 3.0 lanes on the LGA2011-v3 platform.
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Cores 6/12
Boost 3.6 GHz
L3 15 MB
Power 140 W
Socket LGA2011-v3 What reviewers say Bit-tech's 2014 review praised its rendering performance and appeal for a single-GPU enthusiast build, while noting lighter-work advantages for the 4790K. TechSpot's 2018 revisit found useful gaming performance after overclocking, but stronger productivity from newer CPUs; used X99 value depended on the deal, with warranted Ryzen systems another option.
From bit-tech.net and techspot.com
Cores and clocks
Cores 6
Threads 12
Base clock 3.3 GHz
Boost clock 3.6 GHz
L3 cache 15 MB
Cores Haswell-E; six cores with Hyper-Threading; unlocked multiplier and lack of integrated graphics confirmed by exact-model reviews Graphics and AI
Built-in graphics No
Socket LGA2011-v3
Base power 140 W
Unlocked Yes
Cooler in the box No
Memory support Up to 64 GB; four channels; DDR4-1600/1866/2133; maximum bandwidth 68 GB/s; no ECC support
PCIe 28 CPU lanes; PCIe 3.0
Chipsets X99 and LGA2011-v3, as distinguished by Intel's Core i7 comparison chart and exact-model reviews. August release month follows Intel's 29 August family availability notice and contemporary exact-model stock coverage; an exact maker-SKU first-sale day was not established.
Process 22 nm; package size 52.5 × 45 mm
Cooler Intel explicitly excludes a fan and heatsink from the boxed product; a separate cooler is required Pros and cons Pros + Six cores and 12 threads+ Quad-channel DDR4 memory+ Unlocked clock multiplierCons − Requires a separate graphics card− Requires a separate cooler− 28 PCIe lanes rather than the 40 of higher-tier Haswell-E modelsNewer model: Core i7-6800K .
