Intel Core Ultra 7 255H vs Intel Core i7 8665U
We compared two laptop CPUs: Intel Core Ultra 7 255H with 16 cores 2.0GHz and Intel Core i7 8665U with 4 cores 1.9GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.
Main Differences
Intel Core Ultra 7 255H 's Advantages
Released 5 years and 9 months late
Higher specification of memory (8400 vs 2400)
Newer PCIe version (5.0 vs 3.0)
Higher base frequency (2.0GHz vs 1.9GHz)
Larger L3 cache size (24MB vs 8MB)
More modern manufacturing process (3nm vs 14nm)
Intel Core i7 8665U 's Advantages
Lower TDP (15W vs 28W)
Score
Benchmark
Cinebench R23 Single Core
Intel Core Ultra 7 255H
+63%
2029
Intel Core i7 8665U
1244
Cinebench R23 Multi Core
Intel Core Ultra 7 255H
+446%
20521
Intel Core i7 8665U
3752
Geekbench 6 Single Core
Intel Core Ultra 7 255H
+90%
2823
Intel Core i7 8665U
1484
Geekbench 6 Multi Core
Intel Core Ultra 7 255H
+297%
15662
Intel Core i7 8665U
3939
General Parameters
Jan 2025
Release Date
Apr 2019
Intel
Manufacturer
Intel
Laptop
Type
Laptop
x86-64
Instruction Set
x86-64
Arrow Lake
Core Architecture
Whiskey Lake
255H
Processor Number
i7-8665U
FCBGA-2049
Socket
BGA-1528
Arc Graphics 140T
Integrated Graphics
UHD Graphics 620
Package
3 nm
Manufacturing Process
14 nm
20-28 W
Power Consumption
15 W
115 W
Max Turbo Power Consumption
-
110 °C
Peak Operating Temperature
100 °C
CPU Performance
6
Performance Cores
4
6
Performance Core Threads
8
2.0 GHz
Performance Core Base Frequency
1.9 GHz
5.1 GHz
Performance Core Turbo Frequency
4.8 GHz
10
Efficiency Cores
-
10
Efficiency Core Threads
-
1.5 GHz
Efficiency Core Base Frequency
-
4.4 GHz
Efficiency Core Turbo Frequency
-
16
Total Core Count
4
16
Total Thread Count
8
100 MHz
Bus Frequency
-
20
Multiplier
19x
112 K per core
L1 Cache
32 K per core
2 MB per core
L2 Cache
256 K per core
24 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
64 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
2250 MHz
GPU Max Dynamic Frequency
1150 MHz
-
Shader Units
192
-
Texture Units
24
-
Raster Operation Units
3
-
Execution Units
24
-
Power Consumption
15 W
-
Max Resolution
4096x2304 - 60 Hz
-
Graphics Performance
0.38 TFLOPS
Miscellaneous
5.0
PCIe Version
3.0
28
PCIe Lanes
16
-
Extended Instruction Set
SSE4.1, SSE4.2, AVX-2
