i5-2405S vs i7-7660U

Primary details

Comparing Core i7-7660U and Core i5-2405S processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1732	1905
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	0.10
Market segment	Laptop	Desktop processor
Series	Intel Core i7	no data
Power efficiency	16.21	2.96
Architecture codename	Kaby Lake (2016−2019)	Sandy Bridge (2011−2013)
Release date	3 January 2017 (7 years ago)	22 May 2011 (13 years ago)
Launch price (MSRP)	$415	$472

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-7660U and Core i5-2405S 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)	4 (Quad-Core)
Threads	4	4
Base clock speed	2.5 GHz	2.5 GHz
Boost clock speed	4 GHz	3.3 GHz
Bus type	OPI	no data
Bus rate	4 GT/s	5 GT/s
Multiplier	25	no data
L1 cache	128 KB	64 KB (per core)
L2 cache	512 KB	256 KB (per core)
L3 cache	4 MB	6 MB (shared)
Chip lithography	14 nm	32 nm
Die size	no data	216 mm2
Maximum core temperature	100 °C	69 °C
Number of transistors	no data	1,160 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i7-7660U and Core i5-2405S 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	FCBGA1356	FCLGA1155,LGA1155
Power consumption (TDP)	15 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-7660U and Core i5-2405S. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX
AES-NI	+	+
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
eDRAM	64 MB	no data
Speed Shift	+	no data
My WiFi	+	no data
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	-
TSX	+	-
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	+
SIPP	+	-
Smart Response	+	no data
FDI	no data	+
Fast Memory Access	no data	+

Security technologies

Core i7-7660U and Core i5-2405S technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+
Secure Key	+	no data
MPX	+	-
Identity Protection	+	+
SGX	Yes with Intel® ME	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-7660U and Core i5-2405S are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-7660U and Core i5-2405S. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR3
Maximum memory size	32 GB	32 GB
Max memory channels	2	2
Maximum memory bandwidth	34.134 GB/s	21 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare	Intel Iris Plus Graphics 640	Intel HD Graphics 3000
Max video memory	32 GB	no data
Quick Sync Video	+	+
Clear Video	+	no data
Clear Video HD	+	+
Graphics max frequency	1.1 GHz	1.1 GHz
InTru 3D	+	+

Graphics interfaces

Available interfaces and connections of Core i7-7660U and Core i5-2405S integrated GPUs.

Number of displays supported	3	2
eDP	+	no data
DisplayPort	+	-
HDMI	+	-
DVI	+	no data

Graphics image quality

Maximum display resolutions supported by Core i7-7660U and Core i5-2405S integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096x2304@30Hz	no data
Max resolution over eDP	4096x2304@60Hz	no data
Max resolution over DisplayPort	4096x2304@60Hz	no data

Graphics API support

APIs supported by Core i7-7660U and Core i5-2405S integrated GPUs, sometimes API versions are included.

DirectX	12	no data
OpenGL	4.5	no data

Peripherals

Specifications and connection of peripherals supported by Core i7-7660U and Core i5-2405S.

PCIe version	3.0	2.0
PCI Express lanes	12	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	2.57	2.03
Integrated graphics card	3.86	0.66
Recency	3 January 2017	22 May 2011
Physical cores	2	4
Chip lithography	14 nm	32 nm
Power consumption (TDP)	15 Watt	65 Watt

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Should you still have questions on choice between Core i7-7660U and Core i5-2405S, ask them in Comments section, and we shall answer.

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