Celeron 877 vs i7-640M

Primary details

Comparing Core i7-640M and Celeron 877 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2236	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core i7	Intel Celeron
Architecture codename	Arrandale (2010−2011)	Sandy Bridge (2011−2013)
Release date	1 September 2010 (14 years ago)	1 July 2012 (12 years ago)
Launch price (MSRP)	$346	$86

Detailed specifications

Core i7-640M and Celeron 877 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	1.4 GHz
Boost clock speed	3.46 GHz	1.4 GHz
Bus type	DMI 1.0	DMI 2.0
Bus rate	1 × 2.5 GT/s	4 × 5 GT/s
Multiplier	21	14
L1 cache	64K (per core)	64K (per core)
L2 cache	256K (per core)	256K (per core)
L3 cache	4 MB (shared)	2 MB (shared)
Chip lithography	32 nm	32 nm
Die size	81+114 mm2	131 mm2
Maximum core temperature	105 °C	100 °C
Number of transistors	384 million	504 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i7-640M and Celeron 877 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	BGA1288,PGA988	FCBGA1023
Power consumption (TDP)	35 Watt	17 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-640M and Celeron 877. You'll probably need this information if you require some particular technology.

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

Security technologies

Core i7-640M and Celeron 877 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-640M and Celeron 877 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-640M and Celeron 877. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	8 GB	16 GB
Max memory channels	2	2
Maximum memory bandwidth	17.051 GB/s	21.335 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® HD Graphics for Previous Generation Intel® Processors	Intel® HD Graphics for 2nd Generation Intel® Processors
Clear Video	+	-
Clear Video HD	+	-
Graphics max frequency	766 MHz	1 GHz

Graphics interfaces

Available interfaces and connections of Core i7-640M and Celeron 877 integrated GPUs.

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

Peripherals

Specifications and connection of peripherals supported by Core i7-640M and Celeron 877.

PCIe version	2.0	2.0
PCI Express lanes	16	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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Pros & cons summary

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Recency	1 September 2010	1 July 2012
Threads	4	2
Power consumption (TDP)	35 Watt	17 Watt

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Should you still have questions on choice between Core i7-640M and Celeron 877, ask them in Comments section, and we shall answer.

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