i7-640UM vs i7-940

Primary details

Comparing Core i7-940 and Core i7-640UM processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1983	2653
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.24	no data
Market segment	Desktop processor	Laptop
Series	Core i7 (Desktop)	Intel Core i7
Power efficiency	1.35	3.92
Architecture codename	Bloomfield (2008−2010)	Arrandale (2010−2011)
Release date	November 2008 (16 years ago)	7 January 2010 (14 years ago)
Launch price (MSRP)	$299	$305

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-940 and Core i7-640UM 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	2.93 GHz	1.2 GHz
Boost clock speed	3.2 GHz	2.27 GHz
Bus type	no data	DMI 1.0
Bus rate	1333 MHz	1 × 2.5 GT/s
Multiplier	no data	9
L1 cache	64 KB (per core)	128 KB
L2 cache	256 KB (per core)	512 KB
L3 cache	8 MB (shared)	4 MB (shared)
Chip lithography	45 nm	32 nm
Die size	263 mm2	81+114 mm2
Maximum core temperature	68 °C	105 °C
Number of transistors	731 million	382+177 Million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i7-940 and Core i7-640UM 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	1 (Uniprocessor)
Socket	FCLGA1366	BGA1288
Power consumption (TDP)	130 Watt	18 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-940 and Core i7-640UM. 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	-	+
FMA	-	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	+
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	-	+
Flex Memory Access	no data	+
Demand Based Switching	-	no data
PAE	36 Bit	36 Bit
FDI	no data	+
Fast Memory Access	no data	+

Security technologies

Core i7-940 and Core i7-640UM technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-940 and Core i7-640UM are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-940 and Core i7-640UM. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3-800
Maximum memory size	24 GB	8 GB
Max memory channels	3	2
Maximum memory bandwidth	25.6 GB/s	12.799 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel® HD Graphics for Previous Generation Intel® Processors
Clear Video	no data	+
Clear Video HD	no data	+
Graphics max frequency	no data	500 MHz

Graphics interfaces

Available interfaces and connections of Core i7-940 and Core i7-640UM integrated GPUs.

Number of displays supported

no data

2

Peripherals

Specifications and connection of peripherals supported by Core i7-940 and Core i7-640UM.

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.

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Pros & cons summary

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Performance score	1.89	0.76
Physical cores	4	2
Threads	8	4
Chip lithography	45 nm	32 nm
Power consumption (TDP)	130 Watt	18 Watt

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Should you still have questions on choice between Core i7-940 and Core i7-640UM, ask them in Comments section, and we shall answer.

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