Product Compare

Intel Core Ultra 7 255HX vs Intel Core Ultra X9 378H

	CPU Intel Core Ultra 7 255HX	CPU Intel Core Ultra X9 378H
General Parameters
Release Date	Jan 2025	Apr 2026
Manufacturer	Intel	Intel
Type	Laptop	Laptop
Instruction Set	x86-64	x86-64
Core Architecture	Arrow Lake	Panther Lake
Processor Number	255HX	378H
Integrated Graphics	Arc Graphics (4-Cores)	Arc B390
Generation	Ultra 7 (Arrow Lake)	Ultra X9 (Panther Lake-H)
Package
Manufacturing Process	3 nm	3 nm
Socket	FCBGA-2114	Intel BGA 2540
Power Consumption	45-55 W	25 W
Max Turbo Power Consumption	160 W	80 W
Peak Operating Temperature	105 °C	100°C
Foundry	Intel	Intel
Package	FC-LGA18V	FC-BGA
CPU Performance
Performance Cores	8	4
Performance Core Threads	8	8
Performance Core Base Frequency	2.4 GHz	2 GHz
Performance Core Turbo Frequency	5.2 GHz	5 GHz
Efficiency Cores	12	12
Efficiency Core Threads	12	12
Efficiency Core Base Frequency	1.8 GHz	1600 MHz
Efficiency Core Turbo Frequency	4.5 GHz	3.8 GHz
Total Core Count	20	16
Total Thread Count	20	16
Bus Frequency	100 MHz	100 MHz
Multiplier	24	20.0
L1 Cache	112 K per core	192 KB per core
L2 Cache	2 MB per core	2.5 MB per core
L3 Cache	30 MB shared	18 MB shared
Unlocked Multiplier	Yes	No
SMP	1	1
Memory Parameters
Memory Types	DDR5-6400	LPDDR5X-9600
Max Memory Size	192 GB	96 GB
Max Memory Channels	2	2
Max Memory Bandwidth	102.4 GB/s	153.6 GB/s
ECC Memory Support	Yes	No
Graphics Card Parameters
Integrated Graphics	true	true
GPU Base Frequency	300 MHz	800 MHz
GPU Max Dynamic Frequency	1850 MHz	2500 MHz
Shader Units	512	1024
Texture Units	32	64
Raster Operation Units	16	32
Execution Units	64	12
Power Consumption	14	45
Miscellaneous
Official Website	Official Link ↗	Official Link ↗
PCIe Version	5.0	5
PCIe Lanes	24	4
AI Accelerator
Theoretical performance		50 TOPS