Intel Core i5-14400F vs Intel Core i7-3820

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Core i5-14400F compared with Core i7-3820

	IntelCore i5-14400F	IntelCore i7-3820
Overview
Released
Released	January 2024	February 2012
Cores and clocks
Cores
Cores	10 (6 performance, 4 efficiency) (better)	4
Threads
Threads	16 (better)	8
Base clock
Base clock	2.5 GHz	3.6 GHz
Boost clock
Boost clock	4.7 GHz (better)	3.8 GHz
L3 cache
L3 cache	20 MB (better)	10 MB
Cores
Cores	6 Performance-cores and 4 Efficient-cores, with Hyper-Threading; codename Raptor Lake	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	P-core base 2.5 GHz, max turbo 4.7 GHz; E-core base 1.8 GHz, max turbo 3.5 GHz	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	20 MB Intel Smart Cache (L3); 9.5 MB L2	10 MB Intel Smart Cache; L3 level confirmed by both exact reviews.
Graphics and AI
Built-in graphics
Built-in graphics	No	No
Graphics
Graphics	None; a graphics card is required	No integrated graphics or Quick Sync, confirmed by KitGuru’s exact-model review.
Platform
Socket
Socket	LGA1700	LGA2011
Base power
Base power	65 W	130 W
Maximum power
Maximum power	148 W	–
Unlocked
Unlocked	No	No
Cooler in the box
Cooler in the box	–	No
Memory support
Memory support	Up to DDR5 4800 MT/s or up to DDR4 3200 MT/s; 2 channels, up to 192 GB	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 5.0 and 4.0; 20 lanes (Up to 1x16+4, 2x8+4); DMI 4.0 x8	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	Intel 7	32 nm; Sandy Bridge-E.
Cooler
Cooler	max operating temperature 100 °C; thermal specification PCG 2020C	Exact BX80619I73820 Newegg listing states cooling device not included. Intel gives a case-temperature limit of 66.8°C.