Ultra 7 155U vs Atom N455

Primary details

Comparing Atom N455 and Core Ultra 7 155U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	3348	742
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Atom	Intel Meteor Lake-U
Power efficiency	1.61	66.28
Architecture codename	Pinetrail (2009−2011)	Meteor Lake-P (2023)
Release date	1 June 2010 (14 years ago)	14 December 2023 (1 year ago)
Launch price (MSRP)	$64	$490

Detailed specifications

Atom N455 and Core Ultra 7 155U 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)	12 (Dodeca-Core)
Threads	2	14
Base clock speed	1.66 GHz	1.7 GHz
Boost clock speed	1.67 GHz	4.8 GHz
Bus rate	533 MHz	no data
L1 cache	64 KB (per core)	112 KB (per core)
L2 cache	512K (per core)	2 MB (per core)
L3 cache	0 KB	12 MB (shared)
Chip lithography	45 nm	Intel 4 nm
Die size	66 mm2	no data
Maximum core temperature	100 °C	110 °C
Number of transistors	123 million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data

Compatibility

Information on Atom N455 and Core Ultra 7 155U 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
Socket	FCBGA559	FCBGA2049
Power consumption (TDP)	6.5 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Atom N455 and Core Ultra 7 155U. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE2, Intel® SSE3, Intel® SSSE3	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	-	+
AVX	-	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	-	no data
Hyper-Threading Technology	+	+
TSX	-	+
Thermal Monitoring	+	+
Flex Memory Access	no data	+
Demand Based Switching	-	no data
Turbo Boost Max 3.0	no data	-
Deep Learning Boost	-	+
Supported AI Software Frameworks	-	OpenVINO™, WindowsML, ONNX RT

Security technologies

Atom N455 and Core Ultra 7 155U technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Atom N455 and Core Ultra 7 155U are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Atom N455 and Core Ultra 7 155U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR5
Maximum memory size	2 GB	96 GB
Max memory channels	1	2

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel GMA 3150	Intel® Graphics
Quick Sync Video	-	+
Graphics max frequency	no data	1.95 GHz

Graphics interfaces

Available interfaces and connections of Atom N455 and Core Ultra 7 155U integrated GPUs.

Number of displays supported

no data

4

Graphics image quality

Maximum display resolutions supported by Atom N455 and Core Ultra 7 155U integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	no data	4096 x 2304 @ 60Hz (HDMI 2.1 TMDS) 7680 x 4320 @ 60Hz (HDMI2.1 FRL)
Max resolution over eDP	no data	3840x2400 @ 120Hz
Max resolution over DisplayPort	no data	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Atom N455 and Core Ultra 7 155U integrated GPUs, sometimes API versions are included.

DirectX	no data	12.2
OpenGL	no data	4.6

Peripherals

Specifications and connection of peripherals supported by Atom N455 and Core Ultra 7 155U.

PCIe version	no data	4.0
PCI Express lanes	no data	12
PCI support	no data	4.0

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	0.12	10.56
Recency	1 June 2010	14 December 2023
Physical cores	1	12
Threads	2	14
Power consumption (TDP)	6 Watt	15 Watt

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Should you still have questions on choice between Atom N455 and Core Ultra 7 155U, ask them in Comments section, and we shall answer.

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