Atom Z670 vs Core i7-3940XM

Primary details

Comparing Core i7-3940XM and Atom Z670 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1399	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core i7	Intel Atom
Architecture codename	Ivy Bridge (2012−2013)	Lincroft (2010−2011)
Release date	3 September 2012 (11 years ago)	11 April 2011 (13 years ago)
Launch price (MSRP)	$1,096	$75
Current price	$525 (0.5x MSRP)	$900 (12x MSRP)

Detailed specifications

Core i7-3940XM and Atom Z670 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)	1 (Single-Core)
Threads	8	2
Base clock speed	3 GHz	1.5 GHz
Boost clock speed	3.9 GHz	1.5 GHz
Bus support	no data	400 MT/s
L1 cache	64K (per core)	64K (per core)
L2 cache	256K (per core)	512K (per core)
L3 cache	8 MB (shared)	0 KB
Chip lithography	22 nm	45 nm
Die size	160 mm2	65 mm2
Maximum core temperature	105 °C	90 °C
Number of transistors	1,400 million	140 million
64 bit support	+	-
Windows 11 compatibility	-	-
Unlocked multiplier	Yes	No

Compatibility

Information on Core i7-3940XM and Atom Z670 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	FCPGA988	T-PBGA518
Power consumption (TDP)	55 Watt	3 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3940XM and Atom Z670. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX	Intel® SSE2, Intel® SSE3, Intel® SSSE3
AES-NI	+	no data
AVX	+	no data
Enhanced SpeedStep (EIST)	+	+
My WiFi	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	no data
Demand Based Switching	-	no data
FDI	+	no data
Fast Memory Access	+	no data
Status	Discontinued	Discontinued

Security technologies

Core i7-3940XM and Atom Z670 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3940XM and Atom Z670 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 i7-3940XM and Atom Z670. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR2
Maximum memory size	32 GB	2.93 GB
Max memory channels	2	1
Maximum memory bandwidth	25.6 GB/s	3.2 GB/s
ECC memory support	-	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics 4000	PowerVR SGX535
Quick Sync Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	1.35 GHz	no data
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i7-3940XM and Atom Z670 integrated GPUs.

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

Peripherals

Specifications and connection of peripherals supported by Core i7-3940XM and Atom Z670.

PCIe version	3.0	no data
PCI Express lanes	16	no data
PCI support	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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Pros & cons summary

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Recency	3 September 2012	11 April 2011
Physical cores	4	1
Threads	8	2
Cost	$1096	$75
Chip lithography	22 nm	45 nm
Power consumption (TDP)	55 Watt	3 Watt

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Should you still have questions on choice between Core i7-3940XM and Atom Z670, ask them in Comments section, and we shall answer.

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