Atom x7405C vs i7-6660U

Primary details

Comparing Core i7-6660U and Atom x7405C processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1805	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core i7	no data
Power efficiency	14.35	no data
Architecture codename	Skylake (2015−2016)	Amston Lake (2024)
Release date	20 March 2016 (8 years ago)	8 April 2024 (less than a year ago)
Launch price (MSRP)	$415	$57

Detailed specifications

Core i7-6660U and Atom x7405C 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	2.4 GHz	1.7 GHz
Boost clock speed	3.4 GHz	3.4 GHz
Bus type	OPI	no data
Bus rate	4 GT/s	no data
Multiplier	24	no data
L1 cache	128 KB	96 KB (per core)
L2 cache	512 KB	2 MB (shared)
L3 cache	4 MB	6 MB (shared)
Chip lithography	14 nm	10 nm
Maximum core temperature	100 °C	no data
64 bit support	+	+
Windows 11 compatibility	-	no data

Compatibility

Information on Core i7-6660U and Atom x7405C 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	Intel BGA 1264
Power consumption (TDP)	15 Watt	12 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-6660U and Atom x7405C. You'll probably need this information if you require some particular technology.

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

Security technologies

Core i7-6660U and Atom x7405C technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data
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 i7-6660U and Atom x7405C are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-6660U and Atom x7405C. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2133, LPDDR3-1866, DDR3L-1600	DDR4, DDR5
Maximum memory size	32 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	34.134 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel Iris Graphics 540	N/A
Max video memory	32 GB	no data
Quick Sync Video	+	-
Clear Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	1.05 GHz	no data
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i7-6660U and Atom x7405C integrated GPUs.

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

Graphics image quality

Maximum display resolutions supported by Core i7-6660U and Atom x7405C integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096x2304@24Hz	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 i7-6660U and Atom x7405C 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 i7-6660U and Atom x7405C.

PCIe version	3.0	3.0
PCI Express lanes	12	9

Pros & cons summary

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Recency	20 March 2016	8 April 2024
Physical cores	2	4
Chip lithography	14 nm	10 nm
Power consumption (TDP)	15 Watt	12 Watt

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Should you still have questions on choice between Core i7-6660U and Atom x7405C, ask them in Comments section, and we shall answer.

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