Intel Core Ultra 7 255U vs Intel Core i7 8557U
We compared two laptop CPUs: Intel Core Ultra 7 255U with 12 cores 2.0GHz and Intel Core i7 8557U with 4 cores 1.7GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.
Main Differences
Intel Core Ultra 7 255U 's Advantages
Released 5 years and 6 months late
Higher specification of memory (8400 vs 2400)
Newer PCIe version (4.0 vs 3.0)
Higher base frequency (2.0GHz vs 1.7GHz)
Larger L3 cache size (12MB vs 8MB)
More modern manufacturing process (3nm vs 14nm)
Score
Benchmark
Cinebench R23 Single Core
Intel Core Ultra 7 255U
+52%
1803
Intel Core i7 8557U
1180
Cinebench R23 Multi Core
Intel Core Ultra 7 255U
+158%
11888
Intel Core i7 8557U
4595
Geekbench 6 Single Core
Intel Core Ultra 7 255U
+192%
2582
Intel Core i7 8557U
884
Geekbench 6 Multi Core
Intel Core Ultra 7 255U
+240%
10941
Intel Core i7 8557U
3216
General Parameters
Jan 2025
Release Date
Jul 2019
Intel
Manufacturer
Intel
Laptop
Type
Laptop
x86-64
Instruction Set
x86-64
Arrow Lake
Core Architecture
Coffee Lake
255U
Processor Number
i7-8557U
FCBGA-2049
Socket
BGA-1528
Arc Graphics (4-Cores)
Integrated Graphics
Iris Plus Graphics 645
Package
3 nm
Manufacturing Process
14 nm
12-15 W
Power Consumption
15 W
57 W
Max Turbo Power Consumption
-
110 °C
Peak Operating Temperature
100 °C
CPU Performance
2
Performance Cores
4
4
Performance Core Threads
8
2.0 GHz
Performance Core Base Frequency
1.7 GHz
5.2 GHz
Performance Core Turbo Frequency
4.5 GHz
10
Efficiency Cores
-
10
Efficiency Core Threads
-
1.7 GHz
Efficiency Core Base Frequency
-
4.2 GHz
Efficiency Core Turbo Frequency
-
12
Total Core Count
4
14
Total Thread Count
8
100 MHz
Bus Frequency
-
20
Multiplier
17x
112 K per core
L1 Cache
32 K per core
2 MB per core
L2 Cache
256 K per core
12 MB shared
L3 Cache
8 MB shared
No
Unlocked Multiplier
No
Memory Parameters
LPDDR5-8400,LPDDR5x-8400,DDR5-6400
Memory Types
DDR4-2400, LPDDR3-2133
128 GB
Max Memory Size
32 GB
2
Max Memory Channels
2
-
Max Memory Bandwidth
37.5 GB/s
No
ECC Memory Support
No
Graphics Card Parameters
true
Integrated Graphics
true
-
GPU Base Frequency
300 MHz
2100 MHz
GPU Max Dynamic Frequency
1150 MHz
-
Shader Units
384
-
Texture Units
48
-
Raster Operation Units
6
-
Execution Units
48
-
Power Consumption
15 W
-
Max Resolution
4096x2304 - 60 Hz
-
Graphics Performance
0.81 TFLOPS
Miscellaneous
4.0
PCIe Version
3.0
20
PCIe Lanes
16
-
Extended Instruction Set
SSE4.1, SSE4.2, AVX-2
