Intel Core i7 1255U

Cores: 10
L3 cache: 12MB (shared)
TDP: 12-15 W (max. boost up to 55 W)
Transistor size: 10 nm

Core i7 1255U - laptop processor produced by Intel for socket BGA-1744 that has 10 cores and 12 threads. The base clock frequency of the CPU is 1700 MHz, but due to Turbo Boost technology, it can perform up to 4700 MHz. The size of the L3 cache is 12 MB. Please note that this chip has integrated graphics Intel Iris Xe Graphics (96EU).

Test in Benchmarks

Performance test of Intel Core i7 1255U in benchmarks

Cinebench R23

Reputable cross-platform benchmark for high-performance processors

Cinebench R23 (Single-Core)

1668

Cinebench R23 (Multi-Core)

8324

Submit your Cinebench result

GeekBench v6

The new version of this benchmark emulates common operations often used in real-world apps

Geekbench 6 (Single-Core)

1681

Geekbench 6 (Multi-Core)

6830

File compression	513.4 MB/sec
Clang compilation	36.1 Klines/sec
HTML 5 Browser	144.2 pages/sec
PDF Renderer	152.3 Mpixels/sec
Text processing	196.7 pages/sec
Background blur	37.3 images/sec
Photo processing	69.3 images/sec
Ray tracing	11.9 Mpixels/sec

Sources: GeekBench [1]

PassMark

Synthetic test that focuses on raw computational performance for low-level functions

Passmark CPU (Single-Core)

3336

Passmark CPU (Multi-Core)

13845

Integer math	51.6 GOps/sec
Floating point math	34.2 GOps/sec
Find prime numbers	45M Primes/sec
Random string sorting	17.4M Strings/sec
Data encryption	9.6 GBytes/sec
Data compression	150.3 MBytes/sec
Physics	860 Frames/sec
Extended instructions	8.4B Matrices/sec

Sources: PassMark [3]

Specifications

Core i7 1255U technical specifications

General

Vendor	Intel
Released	February 23, 2022
Type	Laptop
instruction set	x86-64
Codename	Alder Lake
Model number	i7-1255U
Integrated GPU	Iris Xe Graphics (96EU)

CPU

Performance Cores
P-Cores	2
P-Threads	4
Base Frequency (P)	1.7 GHz
Turbo Boost Frequency (P)	4.7 GHz

Efficient Cores
E-Cores	8
E-Threads	8
Base Frequency (E)	1.2 GHz
Turbo Boost Frequency (E)	3.5 GHz

Total
Total Cores	10
Total Threads	12
Bus Frequency	100 MHz
Multiplier	17x
L1 Cache	80K (per core)
L2 Cache	1280K (per core)
L3 Cache	12MB (shared)
Unlocked Multiplier	No

Package

Fabrication process	10 nm
TDP (PL1)	12-15 W (configurable)
Max. Boost TDP (PL2)	55 W
Socket	BGA-1744
Peak temperature	100°C

iGPU

Integrated Graphics	Intel Iris Xe Graphics (96EU)
GPU Base Clock	300 MHz
GPU Boost Clock	1250 MHz
Shading Units	768
TMUs	48
ROPs	24
Execution Units	96
TGP	15 W

iGPU FLOPS

1.69 TFLOPS

Memory Support

Memory types	- DDR5-4800 - DDR4-3200 - LPDDR5-5200 - LPDDR4x-4267
Memory Size	64 GB
Max. Memory Channels	2
ECC Support	No

Misc

Official site	Intel Core i7 1255U official page
PCI Express Version	4.0
PCI Express Lanes	20

Сompetitors

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6. AMD Ryzen 7 5700U vs Intel Core i7 1255U

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11. Intel Core i7 1360P vs Intel Core i7 1255U

Compare other CPUs (580+)

Anonymous 11 June 2023 08:24

Can it run Minecraft Java+Bedrock Edition Game Smoothly and Normally?

0 Reply

Anonymous 21 November 2022 22:58

Short Circuit easily got a multi-core Cinebench score of 8765 on just a Surface Laptop 5, during which the laptop throttled heavily, so I'm not sure where you're getting such a low number from. I'm sure without throttling this CPU could easily get 10000.