Ultra 7 155U vs i7-1255U

Place in the ranking	885	734
Place by popularity	37	not in top-100
Market segment	Laptop	Laptop
Series	Intel Alder Lake-M	Intel Meteor Lake-U
Power efficiency	53.88	66.62
Architecture codename	Alder Lake-U (2022)	Meteor Lake-P (2023)
Release date	23 February 2022 (2 years ago)	14 December 2023 (less than a year ago)
Launch price (MSRP)	no data	$490

Detailed specifications

Core i7-1255U 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	10 (Deca-Core)	12 (Dodeca-Core)
Threads	12	14
Base clock speed	1.7 GHz	1.7 GHz
Boost clock speed	4.7 GHz	4.8 GHz
L1 cache	80K (per core)	112 KB (per core)
L2 cache	1.25 MB (per core)	2 MB (per core)
L3 cache	12 MB (shared)	12 MB (shared)
Chip lithography	Intel 7 nm	Intel 4 nm
Maximum core temperature	100 °C	110 °C
64 bit support	+	+
Windows 11 compatibility	+	no data

Compatibility

Information on Core i7-1255U 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	FCBGA1744	FCBGA2049
Power consumption (TDP)	15 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-1255U and Core Ultra 7 155U. 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® AVX2
AES-NI	+	+
FMA	+	-
AVX	+	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	+
Hyper-Threading Technology	+	+
TSX	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	+
Turbo Boost Max 3.0	no data	-
Deep Learning Boost	+	+
Supported AI Software Frameworks	-	OpenVINO™, WindowsML, ONNX RT

Security technologies

Core i7-1255U and Core Ultra 7 155U technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	+
OS Guard	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-1255U and Core Ultra 7 155U are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-1255U and Core Ultra 7 155U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4, DDR5	DDR5
Maximum memory size	64 GB	96 GB
Max memory channels	2	2

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® Iris® Xe Graphics eligible	Intel® Graphics
Quick Sync Video	+	+
Graphics max frequency	1.25 GHz	1.95 GHz
Execution Units	96	no data

Graphics interfaces

Available interfaces and connections of Core i7-1255U and Core Ultra 7 155U integrated GPUs.

Number of displays supported

Graphics image quality

Maximum display resolutions supported by Core i7-1255U and Core Ultra 7 155U integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	4096 x 2304 @ 60Hz	4096 x 2304 @ 60Hz (HDMI 2.1 TMDS) 7680 x 4320 @ 60Hz (HDMI2.1 FRL)
Max resolution over eDP	4096 x 2304 @ 120Hz	3840x2400 @ 120Hz
Max resolution over DisplayPort	7680 x 4320 @ 60Hz	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core i7-1255U and Core Ultra 7 155U integrated GPUs, sometimes API versions are included.

DirectX	12.1	12.2
OpenGL	4.6	4.6

Peripherals

Specifications and connection of peripherals supported by Core i7-1255U and Core Ultra 7 155U.

PCIe version	4.0	4.0
PCI Express lanes	20	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.

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.

i7-1255U 8.54

Ultra 7 155U 10.56
+23.7%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i7-1255U 13562

Ultra 7 155U 16781
+23.7%

Cinebench 15 64-bit multi-core

Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.

i7-1255U 1389

Ultra 7 155U 1505
+8.4%

Cinebench 15 64-bit single-core

Cinebench R15 (standing for Release 15) is a benchmark made by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version (sometimes called Single-Thread) only uses a single processor thread to render a room full of reflective spheres and light sources.

i7-1255U 238
+1.3%

Ultra 7 155U 235