Pentium 3805U vs i7-2640M

Primary details

Comparing Core i7-2640M and Pentium 3805U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2111	2659
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core i7	Intel Pentium
Power efficiency	4.20	4.65
Architecture codename	Sandy Bridge (2011−2013)	Broadwell-U (2015)
Release date	4 September 2011 (13 years ago)	1 March 2015 (9 years ago)
Launch price (MSRP)	$346	$161

Detailed specifications

Core i7-2640M and Pentium 3805U 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	2 (Dual-core)	2 (Dual-core)
Threads	4	2
Base clock speed	2.8 GHz	1.9 GHz
Boost clock speed	3.5 GHz	1.9 GHz
Bus type	DMI 2.0	no data
Bus rate	4 × 5 GT/s	5 GT/s
Multiplier	28	no data
L1 cache	128 KB	64K (per core)
L2 cache	512 KB	256K (per core)
L3 cache	4 MB	2 MB (shared)
Chip lithography	32 nm	14 nm
Die size	149 mm2	82 mm2
Maximum core temperature	100 °C	105 °C
Maximum case temperature (TCase)	no data	105 °C
Number of transistors	624 Million	1300 Million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i7-2640M and Pentium 3805U 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	FCBGA1023,PPGA988	FCBGA1168
Power consumption (TDP)	35 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-2640M and Pentium 3805U. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX	Intel® SSE4.1, Intel® SSE4.2
AES-NI	+	-
FMA	+	-
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
My WiFi	+	no data
Turbo Boost Technology	2.0	-
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	+
Smart Response	no data	-
Demand Based Switching	-	no data
FDI	+	+
Fast Memory Access	+	+

Security technologies

Core i7-2640M and Pentium 3805U technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+
Secure Key	no data	+
Identity Protection	+	+
OS Guard	no data	-
Anti-Theft	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-2640M and Pentium 3805U are enumerated here.

AMD-V	+	+
VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-2640M and Pentium 3805U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	16 GB	16 GB
Max memory channels	2	2
Maximum memory bandwidth	228.707 GB/s	25.6 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics 3000	Intel® HD Graphics for 5th Generation Intel® Processors
Quick Sync Video	+	+
Clear Video	no data	+
Clear Video HD	+	-
Graphics max frequency	1.3 GHz	800 MHz
InTru 3D	+	+

Graphics interfaces

Available interfaces and connections of Core i7-2640M and Pentium 3805U integrated GPUs.

Number of displays supported	2	3
eDP	+	+
DisplayPort	+	+
HDMI	+	+
SDVO	+	no data
CRT	+	no data

Graphics API support

APIs supported by Core i7-2640M and Pentium 3805U integrated GPUs, sometimes API versions are included.

DirectX

no data

11.2/12

Peripherals

Specifications and connection of peripherals supported by Core i7-2640M and Pentium 3805U.

PCIe version	2.0	2.0
PCI Express lanes	16	12

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	1.56	0.74
Recency	4 September 2011	1 March 2015
Threads	4	2
Chip lithography	32 nm	14 nm
Power consumption (TDP)	35 Watt	15 Watt

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Should you still have questions on choice between Core i7-2640M and Pentium 3805U, ask them in Comments section, and we shall answer.

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