i7-940XM vs i9-7940X

Primary details

Comparing Core i9-7940X and Core i7-940XM processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	408	2228
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.29	no data
Market segment	Desktop processor	Laptop
Series	Intel Core i9	Intel Core i7
Power efficiency	9.37	2.39
Architecture codename	Skylake (server) (2017−2018)	Clarksfield (2009−2010)
Release date	1 September 2017 (7 years ago)	20 June 2010 (14 years ago)
Launch price (MSRP)	$1,399	$1,096

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-7940X and Core i7-940XM basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	14 (Tetradeca-Core)	4 (Quad-Core)
Threads	28	8
Base clock speed	3.1 GHz	2.13 GHz
Boost clock speed	4.4 GHz	3.33 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	2500 MHz
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	1 MB (per core)	256 KB (per core)
L3 cache	19.25 MB (shared)	8 MB (shared)
Chip lithography	14 nm	45 nm
Die size	484 mm2	296 mm2
Maximum core temperature	102 °C	100 °C
Number of transistors	no data	774 million
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	+	+

Compatibility

Information on Core i9-7940X and Core i7-940XM compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1 (Uniprocessor)	1
Socket	FCLGA2066	FCPGA988,PGA988
Power consumption (TDP)	165 Watt	55 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7940X and Core i7-940XM. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512	Intel® SSE4.2
AES-NI	+	-
AVX	+	-
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	+
Hyper-Threading Technology	+	+
TSX	+	-
Idle States	no data	+
Thermal Monitoring	-	+
Demand Based Switching	no data	-
PAE	no data	36 Bit
Turbo Boost Max 3.0	+	no data

Security technologies

Core i9-7940X and Core i7-940XM technologies aimed at improving security, for example, by protecting against hacks.

TXT	no data	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7940X and Core i7-940XM are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	no data	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7940X and Core i7-940XM. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR3-1066, DDR3-1333
Maximum memory size	128 GB	8 GB
Max memory channels	4	2
Maximum memory bandwidth	85.33 GB/s	21 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

None

Peripherals

Specifications and connection of peripherals supported by Core i9-7940X and Core i7-940XM.

PCIe version	3.0	2
PCI Express lanes	44	16

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	16.34	1.39
Recency	1 September 2017	20 June 2010
Physical cores	14	4
Threads	28	8
Chip lithography	14 nm	45 nm
Power consumption (TDP)	165 Watt	55 Watt

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Should you still have questions on choice between Core i9-7940X and Core i7-940XM, ask them in Comments section, and we shall answer.

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