Intel Core Ultra X9 388H vs Intel Core Ultra 7 255U
CPU Specs Compare
General Parameters
Release Date
Jan 2026
Jan 2025
Manufacturer
Intel
Intel
Type
Laptop
Laptop
Instruction Set
x86-64
x86-64
Core Architecture
Panther Lake
Arrow Lake
Processor Number
388H
255U
Integrated Graphics
Arc B390
Arc Graphics (4-Cores)
Generation
Ultra X9 (Panther Lake-H)
-
Package
Manufacturing Process
2 nm
3 nm
Socket
FCBGA2540
FCBGA-2049
Power Consumption
15-25 W
12-15 W
Max Turbo Power Consumption
80 W
57 W
Peak Operating Temperature
100 °C
110 °C
Foundry
Intel
-
Package
FC-BGA
-
CPU Performance
Performance Cores
4
2
Performance Core Threads
4
4
Performance Core Base Frequency
2.1 GHz
2.0 GHz
Performance Core Turbo Frequency
5.1 GHz
5.2 GHz
Efficiency Cores
12
10
Efficiency Core Threads
12
10
Efficiency Core Base Frequency
1.6 GHz
1.7 GHz
Efficiency Core Turbo Frequency
4 GHz
4.2 GHz
Total Core Count
16
12
Total Thread Count
16
14
Bus Frequency
100 MHz
100 MHz
Multiplier
21
20
L1 Cache
192 K per core
112 K per core
L2 Cache
2560 K per core
2 MB per core
L3 Cache
18 MB shared
12 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
300 MHz
-
GPU Max Dynamic Frequency
2500 MHz
2100 MHz
Shader Units
1536
-
Texture Units
48
-
Raster Operation Units
24
-
Execution Units
12
-
Power Consumption
45
-
AI Accelerator
Theoretical performance
50 TOPS
-
📊 Benchmark
Geekbench 6
3,026
2,582
Geekbench 6
17,541
10,941
Cinebench 2024
130
101
Cinebench R23
-
1,803
Cinebench R23
-
11,888
Cinebench 2024
-
588