Home Comparison AMD Ryzen 9 7945HX vs AMD Ryzen 7 7840U

AMD Ryzen 9 7945HX vs AMD Ryzen 7 7840U

We compared two laptop CPUs: AMD Ryzen 9 7945HX with 16 cores 2.5GHz and AMD Ryzen 7 7840U with 8 cores 3.3GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

AMD Ryzen 9 7945HX 's Advantages
Newer PCIe version (5.0 vs 4.0)
Larger L3 cache size (64MB vs 16MB)
AMD Ryzen 7 7840U 's Advantages
Better graphics card performance
Higher specification of memory (7500 vs 5200)
Larger memory bandwidth (89.6GB/s vs 83.2GB/s)
Higher base frequency (3.3GHz vs 2.5GHz)
More modern manufacturing process (4nm vs 5nm)
Lower TDP (30W vs 75W)

Score

Benchmark

Cinebench R23 Single Core
AMD Ryzen 9 7945HX +11%
1950
AMD Ryzen 7 7840U
1745
Cinebench R23 Multi Core
AMD Ryzen 9 7945HX +162%
33542
AMD Ryzen 7 7840U
12789
Geekbench 6 Single Core
AMD Ryzen 9 7945HX +17%
2906
AMD Ryzen 7 7840U
2480
Geekbench 6 Multi Core
AMD Ryzen 9 7945HX +68%
19413
AMD Ryzen 7 7840U
11518
Cinebench 2024 Multi Core
AMD Ryzen 9 7945HX +131%
1669
AMD Ryzen 7 7840U
722
Blender
AMD Ryzen 9 7945HX +120%
501
AMD Ryzen 7 7840U
227
Geekbench 5 Single Core
AMD Ryzen 9 7945HX +9%
2095
AMD Ryzen 7 7840U
1907
Geekbench 5 Multi Core
AMD Ryzen 9 7945HX +87%
19488
AMD Ryzen 7 7840U
10387
Passmark CPU Single Core
AMD Ryzen 9 7945HX +13%
4076
AMD Ryzen 7 7840U
3593
Passmark CPU Multi Core
AMD Ryzen 9 7945HX +121%
55213
AMD Ryzen 7 7840U
24968
VS

General Parameters

Jan 2023
Release Date
May 2023
AMD
Manufacturer
Amd
Laptop
Type
Laptop
x86-64
Instruction Set
x86-64
Zen 4 (Dragon Range)
Core Architecture
Zen 4 (Phoenix)
FL1
Socket
FP8
Radeon 610M
Integrated Graphics
Radeon 780M

Package

13.1 billions
Transistor Count
25 billions
5 nm
Manufacturing Process
4 nm
55-75 W
Power Consumption
15-30 W
100°C
Peak Operating Temperature
100 °C

CPU Performance

16
Performance Cores
8
32
Performance Core Threads
16
2.5 GHz
Performance Core Base Frequency
3.3 GHz
5.4 GHz
Performance Core Turbo Frequency
5.1 GHz
16
Total Core Count
8
32
Total Thread Count
16
100 MHz
Bus Frequency
100 MHz
25x
Multiplier
33
64 K per core
L1 Cache
64 K per core
1 MB per core
L2 Cache
8 MB
64 MB shared
L3 Cache
16 MB
Yes
Unlocked Multiplier
No

Memory Parameters

DDR5-5200
Memory Types
DDR5-5600, LPDDR5x-7500
64 GB
Max Memory Size
256 GB
2
Max Memory Channels
2
83.2 GB/s
Max Memory Bandwidth
89.6 GB/s
No
ECC Memory Support
No

Graphics Card Parameters

true
Integrated Graphics
true
1500 MHz
GPU Base Frequency
800 MHz
2200 MHz
GPU Max Dynamic Frequency
2700 MHz
128
Shader Units
768
8
Texture Units
48
4
Raster Operation Units
32
2
Execution Units
12
15 W
Power Consumption
15 W
-
Max Resolution
7680x4320 - 60 Hz
0.49 TFLOPS
Graphics Performance
4.15 TFLOPS

AI Accelerator

-
NPU
AMD Ryzen™ AI
-
Theoretical performance
10 TOPS

Miscellaneous

5.0
PCIe Version
4.0
28
PCIe Lanes
20

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