Product Compare

Intel Core i7 1255U vs Intel Core Ultra 5 338H

	CPU Intel Core i7 1255U	CPU Intel Core Ultra 5 338H
General Parameters
Release Date	Feb 2022	Jan 2026
Manufacturer	Intel	Intel
Type	Laptop	Laptop
Instruction Set	x86-64	x86-64
Core Architecture	Alder Lake	Panther Lake
Processor Number	i7-1255U	338H
Integrated Graphics	Iris Xe Graphics (96EU)	Arc B370
Generation		Intel Core Ultra Series 3
Package
Manufacturing Process	10 nm	3 nm
Socket	BGA-1744	Custom
Power Consumption	12-15 W	15-25 W
Max Turbo Power Consumption	55 W	80 W
Peak Operating Temperature	100°C	100 °C
CPU Performance
Performance Cores	2	4
Performance Core Threads	4	4
Performance Core Base Frequency	1.7 GHz	1.9 GHz
Performance Core Turbo Frequency	4.7 GHz	4.7 GHz
Efficiency Cores	8	8
Efficiency Core Threads	8	8
Efficiency Core Base Frequency	1.2 GHz	1.5 GHz
Efficiency Core Turbo Frequency	3.5 GHz	3.6 GHz
Total Core Count	10	12
Total Thread Count	12	12
Bus Frequency	100 MHz	100 MHz
Multiplier	17x	19
L1 Cache	80 K per core	192 K per core
L2 Cache	1280 K per core	2560 K per core
L3 Cache	12 MB shared	18 MB shared
Unlocked Multiplier	No	No
Memory Parameters
Memory Types	DDR5-4800, DDR4-3200, LPDDR5-5200, LPDDR4x-4267	LPDDR5X-8533
Max Memory Size	64 GB	96 GB
Max Memory Channels	2	2
Max Memory Bandwidth	76.8 GB/s	153.6 GB/s
ECC Memory Support	No	No
Graphics Card Parameters
Integrated Graphics	true	true
GPU Base Frequency	300 MHz	800 MHz
GPU Max Dynamic Frequency	1250 MHz	2400 MHz
Shader Units	768	1024
Texture Units	48	64
Raster Operation Units	24	32
Execution Units	96	10
Power Consumption	15 W	45
Max Resolution		7680 x 4320 @ 60Hz
Miscellaneous
Official Website	Official Link ↗	Official Link ↗
PCIe Version	4.0	5.0
PCIe Lanes	20	12
AI Accelerator
Theoretical performance		50 TOPS
Benchmarks
Cinebench R23 Single Core	1701	1988
Cinebench R23 Multi Core	8233	16565
Geekbench 6 Single Core	2248	2743
Geekbench 6 Multi Core	7162	14448