Product Compare

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

	CPU Intel Core Ultra X9 378H	CPU Intel Core Ultra 7 255H
General Parameters
Release Date	Apr 2026	Jan 2025
Manufacturer	Intel	Intel
Type	Laptop	Laptop
Instruction Set	x86-64	x86-64
Core Architecture	Panther Lake	Arrow Lake
Processor Number	378H	255H
Integrated Graphics	Arc B390	Arc Graphics 140T
Generation	Ultra X9 (Panther Lake-H)
Package
Manufacturing Process	3 nm	3 nm
Socket	Intel BGA 2540	FCBGA-2049
Power Consumption	25 W	20-28 W
Max Turbo Power Consumption	80 W	115 W
Peak Operating Temperature	100°C	110 °C
Foundry	Intel
Package	FC-BGA
CPU Performance
Performance Cores	4	6
Performance Core Threads	8	6
Performance Core Base Frequency	2 GHz	2.0 GHz
Performance Core Turbo Frequency	5 GHz	5.1 GHz
Efficiency Cores	12	10
Efficiency Core Threads	12	10
Efficiency Core Base Frequency	1600 MHz	1.5 GHz
Efficiency Core Turbo Frequency	3.8 GHz	4.4 GHz
Total Core Count	16	16
Total Thread Count	16	16
Bus Frequency	100 MHz	100 MHz
Multiplier	20.0	20
L1 Cache	192 KB per core	112 K per core
L2 Cache	2.5 MB per core	2 MB per core
L3 Cache	18 MB shared	24 MB shared
Unlocked Multiplier	No	No
SMP	1
Memory Parameters
Memory Types	LPDDR5X-9600	LPDDR5-8400,LPDDR5x-8400,DDR5-6400
Max Memory Size	96 GB	128 GB
Max Memory Channels	2	2
Max Memory Bandwidth	153.6 GB/s
ECC Memory Support	No	No
Graphics Card Parameters
Integrated Graphics	true	true
GPU Base Frequency	800 MHz
GPU Max Dynamic Frequency	2500 MHz	2250 MHz
Shader Units	1024
Texture Units	64
Raster Operation Units	32
Execution Units	12
Power Consumption	45
AI Accelerator
Theoretical performance	50 TOPS
Miscellaneous
Official Website	Official Link ↗	Official Link ↗
PCIe Version	5	5.0
PCIe Lanes	4	28