Core i7-2640M vs Core i7-2840QM

Primary Details

Comparing Core i7-2840QM and Core i7-2640M processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1642	1979
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core i7	Intel Core i7
Architecture codename	Sandy Bridge (2011−2013)	Sandy Bridge (2011−2013)
Release date	4 September 2011 (12 years ago)	4 September 2011 (12 years ago)
Launch price (MSRP)	no data	$346
Current price	no data	$114 (0.3x MSRP)

Detailed Specifications

Core i7-2840QM and Core i7-2640M 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	4 (Quad-Core)	2 (Dual-core)
Threads	8	4
Base clock speed	no data	2.8 GHz
Boost clock speed	2.4 GHz	3.5 GHz
Bus support	4 × 5 GT/s	no data
L1 cache	256 KB	128 KB
L2 cache	1 MB	512 KB
L3 cache	8 MB	4 MB
Chip lithography	32 nm	32 nm
Die size	216 mm2	149 mm2
Maximum core temperature	no data	100 °C
Number of transistors	1160 Million	624 Million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No

Compatibility

Information on Core i7-2840QM and Core i7-2640M 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 (Uniprocessor)
Socket	Socket G2	FCBGA1023,PPGA988
Power consumption (TDP)	45 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-2840QM and Core i7-2640M. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® AVX
AES-NI	+	+
FMA	+	+
AVX	+	+
vPro	+	+
Enhanced SpeedStep (EIST)	+	+
My WiFi	no data	+
Turbo Boost Technology	no data	2.0
Hyper-Threading Technology	no data	+
Idle States	no data	+
Thermal Monitoring	no data	+
Flex Memory Access	no data	+
Demand Based Switching	no data	-
FDI	no data	+
Fast Memory Access	no data	+
Status	no data	Discontinued

Security technologies

Core i7-2840QM and Core i7-2640M technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	no data	+
Identity Protection	no data	+
Anti-Theft	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-2840QM and Core i7-2640M are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-2840QM and Core i7-2640M. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	no data	DDR3
Maximum memory size	32 GB	16 GB
Max memory channels	no data	2
Maximum memory bandwidth	25.598 GB/s	21.3 GB/s
ECC memory support	no data	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics 3000	Intel HD Graphics 3000
Quick Sync Video	no data	+
Clear Video HD	no data	+
Graphics max frequency	no data	1.3 GHz
InTru 3D	no data	+

Graphics interfaces

Available interfaces and connections of Core i7-2840QM and Core i7-2640M integrated GPUs.

Number of displays supported	no data	2
eDP	no data	+
DisplayPort	no data	+
HDMI	no data	+
SDVO	no data	+
CRT	no data	+

Peripherals

Specifications and connection of peripherals supported by Core i7-2840QM and Core i7-2640M.

PCIe version	no data	2.0
PCI Express lanes	no data	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.

Core i7-2840QM outperforms Core i7-2640M by 56% based on our aggregated benchmark results.

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Pros & Cons Summary

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Performance score	2.48	1.59
Physical cores	4	2
Threads	8	4
Power consumption (TDP)	45 Watt	35 Watt

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Should you still have questions on choice between Core i7-2840QM and Core i7-2640M, ask them in Comments section, and we shall answer.

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