Intel Core i7-14700K vs Intel Core i9-9940X

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Core i7-14700K compared with Core i9-9940X

	IntelCore i7-14700K	IntelCore i9-9940X
Overview
Released
Released	October 2023	2018
Cores and clocks
Cores
Cores	20 (8 performance, 12 efficiency) (better)	14
Threads
Threads	28	28
Base clock
Base clock	3.4 GHz	3.3 GHz
Boost clock
Boost clock	5.6 GHz (better)	4.5 GHz
L3 cache
L3 cache	33 MB (better)	19.25 MB
Cores
Cores	8 Performance-cores and 12 Efficient-cores, with Hyper-Threading; codename Raptor Lake	Skylake-X refresh; Hyper-Threading and an unlocked multiplier, confirmed by Intel’s exact-model launch table.
Clocks
Clocks	P-core base 3.4 GHz, max turbo 5.5 GHz; E-core base 2.5 GHz, max turbo 4.3 GHz; Turbo Boost Max 3.0 5.6 GHz	Turbo Boost Max 3.0 up to 4.50 GHz on the preferred cores; ordinary Turbo Boost 2.0 up to 4.40 GHz. Intel planned November 2018 availability. ASCII’s contemporary report confirms Japanese retail sale on 21 December 2018, but earlier worldwide sale was not established; year precision is retained.
Cache
Cache	33 MB Intel Smart Cache (L3); 28 MB L2	19.25 MB Intel Smart Cache; L3 designation confirmed by the exact Newegg listing.
Graphics and AI
Built-in graphics
Built-in graphics	Yes	No
Graphics
Graphics	Intel UHD Graphics 770, 32 execution units, up to 1.6 GHz; outputs eDP 1.4b, DP 1.4a, HDMI 2.1; up to 4 displays	No processor graphics, explicitly confirmed by Intel’s exact-model support table.
Platform
Socket
Socket	LGA1700	LGA2066
Base power
Base power	125 W	165 W
Maximum power
Maximum power	253 W	–
Unlocked
Unlocked	Yes	Yes
Cooler in the box
Cooler in the box	–	No
Memory support
Memory support	Up to DDR5 5600 MT/s or up to DDR4 3200 MT/s; 2 channels, up to 192 GB; ECC supported	Up to 128 GB; four channels of DDR 4-2666; 85 GB/s maximum published bandwidth; no ECC.
PCIe
PCIe	PCIe 5.0 and 4.0; 20 lanes (Up to 1x16+4, 2x8+4); DMI 4.0 x8	44 CPU lanes; PCIe 3.0. The 68-lane family platform figure includes chipset lanes.
Chipsets
Chipsets	Intel 600 and 700 series	Intel X 299; LGA 2066.
Process
Process	Intel 7	14 nm; Skylake-X refresh.
Cooler
Cooler	max operating temperature 100 °C; thermal specification PCG 2020A	Intel explicitly excludes a fan and heatsink from the boxed product. Intel’s support article confirms solder thermal interface material for this exact model; published junction limit 88°C.