i7-1255U vs Atom Z605

Primary details

Comparing Atom Z605 and Core i7-1255U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	884
Place by popularity	not in top-100	37
Market segment	Laptop	Laptop
Series	Intel Atom	Intel Alder Lake-M
Power efficiency	no data	53.88
Architecture codename	Lincroft (2010−2011)	Alder Lake-U (2022)
Release date	4 May 2010 (14 years ago)	23 February 2022 (2 years ago)

Detailed specifications

Atom Z605 and Core i7-1255U 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	1 (Single-Core)	10 (Deca-Core)
Threads	1	12
Base clock speed	no data	1.7 GHz
Boost clock speed	1 GHz	4.7 GHz
Bus type	cDMI	no data
Bus rate	400 MT/s	no data
Multiplier	10	no data
L1 cache	64K (per core)	80K (per core)
L2 cache	512 KB (per core)	1.25 MB (per core)
L3 cache	0 KB	12 MB (shared)
Chip lithography	45 nm	Intel 7 nm
Die size	65.2526 mm2	no data
Maximum core temperature	no data	100 °C
Number of transistors	140 million	no data
64 bit support	-	+
Windows 11 compatibility	-	+

Compatibility

Information on Atom Z605 and Core i7-1255U 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	Intel BGA 518	FCBGA1744
Power consumption (TDP)	2.2 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Atom Z605 and Core i7-1255U. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	-	+
FMA	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Hyper-Threading Technology	no data	+
TSX	-	+
Thermal Monitoring	-	+
Flex Memory Access	no data	+
Deep Learning Boost	-	+

Security technologies

Atom Z605 and Core i7-1255U technologies aimed at improving security, for example, by protecting against hacks.

TXT	no data	+
EDB	no data	+
Secure Key	no data	+
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Atom Z605 and Core i7-1255U are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Atom Z605 and Core i7-1255U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2	DDR4, DDR5
Maximum memory size	2 GB	64 GB
Max memory channels	1	2
Maximum memory bandwidth	3.2 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	PowerVR SGX535	Intel® Iris® Xe Graphics eligible
Quick Sync Video	-	+
Graphics max frequency	no data	1.25 GHz
Execution Units	no data	96

Graphics interfaces

Available interfaces and connections of Atom Z605 and Core i7-1255U integrated GPUs.

Number of displays supported

no data

4

Graphics image quality

Maximum display resolutions supported by Atom Z605 and Core i7-1255U integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	no data	4096 x 2304 @ 60Hz
Max resolution over eDP	no data	4096 x 2304 @ 120Hz
Max resolution over DisplayPort	no data	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Atom Z605 and Core i7-1255U integrated GPUs, sometimes API versions are included.

DirectX	no data	12.1
OpenGL	no data	4.6

Peripherals

Specifications and connection of peripherals supported by Atom Z605 and Core i7-1255U.

PCIe version	no data	4.0
PCI Express lanes	no data	20

Pros & cons summary

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Recency	4 May 2010	23 February 2022
Physical cores	1	10
Threads	1	12
Power consumption (TDP)	2 Watt	15 Watt

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