Intel Core i5-3570K vs Intel Core i7-3820

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Core i5-3570K compared with Core i7-3820

	IntelCore i5-3570K	IntelCore i7-3820
Overview
Released
Released	April 2012	February 2012
Cores and clocks
Cores
Cores	4	4
Threads
Threads	4	8 (better)
Base clock
Base clock	3.4 GHz	3.6 GHz
Boost clock
Boost clock	3.8 GHz	3.8 GHz
L3 cache
L3 cache	6 MB	10 MB (better)
Cores
Cores	Four cores without Hyper-Threading; Intel Turbo Boost 2.0 supported. Intel VT-x supported; VT-d is not supported on this model.	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
Clocks	Maximum turbo is a single-core frequency; sustained clocks and overclocking depend on motherboard support and cooling. Intel publishes TDP without a separate maximum turbo-power figure.	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
Cache	–	10 MB Intel Smart Cache; L3 level confirmed by both exact reviews.
Graphics and AI
Built-in graphics
Built-in graphics	Yes	No
Graphics
Graphics	Intel HD Graphics 4000; 650 MHz base, up to 1.15 GHz; three displays; Quick Sync Video. Intel's launch information identifies DirectX 11 support; available outputs depend on the motherboard.	No integrated graphics or Quick Sync, confirmed by KitGuru’s exact-model review.
Platform
Socket
Socket	LGA1155	LGA2011
Base power
Base power	77 W	130 W
Unlocked
Unlocked	Yes	No
Cooler in the box
Cooler in the box	–	No
Memory support
Memory support	Up to 32 GB; two channels; DDR3-1333/1600; 25.6 GB/s maximum bandwidth; ECC not supported.	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
PCIe	PCIe 3.0; configurations up to 1×16, 2×8 or 1×8+2×4, as listed by Intel. Motherboard support determines available slot configurations.	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
Chipsets	–	Intel X79; LGA2011.
Process
Process	22 nm; Ivy Bridge; 3D tri-gate transistors; 37.5 × 37.5 mm package; 67.4°C Tcase limit, not a junction-temperature limit.	32 nm; Sandy Bridge-E.
Cooler
Cooler	LGA1155-compatible cooling required. Intel announced the quad-core family on 23 April 2012; Ars Technica's contemporaneous launch report quotes Newegg confirming retail sale on 29 April. The archived maker sale notice could not be read, so the day is supported by named secondary retail coverage.	Exact BX80619I73820 Newegg listing states cooling device not included. Intel gives a case-temperature limit of 66.8°C.