Intel Core i7-4820K vs Intel Core i7-5820K

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Core i7-4820K compared with Core i7-5820K

	IntelCore i7-4820K	IntelCore i7-5820K
Overview
Released
Released	September 2013	August 2014
Cores and clocks
Cores
Cores	4	6 (better)
Threads
Threads	8	12 (better)
Base clock
Base clock	3.7 GHz	3.3 GHz
Boost clock
Boost clock	3.9 GHz (better)	3.6 GHz
L3 cache
L3 cache	10 MB	15 MB (better)
Cores
Cores	Ivy Bridge-E; 4 cores with Hyper-Threading. The unlocked multiplier is confirmed by the exact-model reviews.	Haswell-E; six cores with Hyper-Threading; unlocked multiplier and lack of integrated graphics confirmed by exact-model reviews
Clocks
Clocks	Turbo Boost 2.0 up to 3.90 GHz. September availability follows Hardware Canucks’ contemporary report of widespread store availability and Intel’s Q3 2013 launch quarter; an exact maker first-sale day was not established.	–
Graphics and AI
Built-in graphics
Built-in graphics	No	No
Graphics
Graphics	No processor graphics, confirmed by Intel’s exact-model comparison-chart row; a separate graphics solution is required.	–
Platform
Socket
Socket	LGA2011	LGA2011-v3
Base power
Base power	130 W	140 W
Unlocked
Unlocked	Yes	Yes
Cooler in the box
Cooler in the box	No	No
Memory support
Memory support	Up to 64 GB; four channels of DDR3-1333/1600/1866; maximum bandwidth 59.7 GB/s; no ECC.	Up to 64 GB; four channels; DDR4-1600/1866/2133; maximum bandwidth 68 GB/s; no ECC support
PCIe
PCIe	40 CPU lanes; PCIe 3.0	28 CPU lanes; PCIe 3.0
Chipsets
Chipsets	X79 and LGA2011, confirmed by the exact-model reviews.	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
Process	22 nm; Ivy Bridge-E. Package size 52.5 × 45.0 mm.	22 nm; package size 52.5 × 45 mm
Cooler
Cooler	Intel explicitly excludes a fan and heatsink from the boxed product; a separate compatible cooler is required.	Intel explicitly excludes a fan and heatsink from the boxed product; a separate cooler is required