Pentium G620 vs i7-840QM

Primary details

Comparing Core i7-840QM and Pentium G620 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2303	2635
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	7.43
Market segment	Laptop	Desktop processor
Series	Intel Core i7	no data
Power efficiency	2.59	1.11
Architecture codename	Clarksfield (2009−2010)	Sandy Bridge (2011−2013)
Release date	22 June 2010 (14 years ago)	22 May 2011 (13 years ago)
Launch price (MSRP)	$568	$60

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-840QM and Pentium G620 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	2
Base clock speed	1.86 GHz	2.6 GHz
Boost clock speed	3.2 GHz	2.6 GHz
Bus type	DMI 1.0	no data
Bus rate	2.5 GT/s	no data
Multiplier	14	no data
L1 cache	256 KB	64 KB (per core)
L2 cache	1 MB	256 KB (per core)
L3 cache	8 MB (shared)	3 MB (shared)
Chip lithography	45 nm	32 nm
Die size	296 mm2	131 mm2
Maximum core temperature	100 °C	69 °C
Number of transistors	774 million	504 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i7-840QM and Pentium G620 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	FCPGA988,PGA988	FCLGA1155
Power consumption (TDP)	45 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-840QM and Pentium G620. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	Intel® SSE4.1, Intel® SSE4.2
AES-NI	-	+
AVX	-	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	+	-
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	no data	+
PAE	36 Bit	no data
FDI	no data	+
Fast Memory Access	no data	+

Security technologies

Core i7-840QM and Pentium G620 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-840QM and Pentium G620 are enumerated here.

VT-d	+	-
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-840QM and Pentium G620. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	8 GB	32 GB
Max memory channels	2	2
Maximum memory bandwidth	21.335 GB/s	17 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	None	Intel® HD Graphics for 2nd Generation Intel® Processors
Graphics max frequency	no data	1.1 GHz

Graphics interfaces

Available interfaces and connections of Core i7-840QM and Pentium G620 integrated GPUs.

Number of displays supported

no data

2

Peripherals

Specifications and connection of peripherals supported by Core i7-840QM and Pentium G620.

PCIe version	2	2.0
PCI Express lanes	16	no data

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	1.28	0.79
Recency	22 June 2010	22 May 2011
Physical cores	4	2
Threads	8	2
Chip lithography	45 nm	32 nm
Power consumption (TDP)	45 Watt	65 Watt

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Should you still have questions on choice between Core i7-840QM and Pentium G620, ask them in Comments section, and we shall answer.

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