AMD Ryzen 5 8645HS vs AMD A4-9120C

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CPU comparison with benchmarks


AMD Ryzen 5 8645HS CPU1 vs CPU2 AMD A4-9120C
AMD Ryzen 5 8645HS AMD A4-9120C

CPU comparison

AMD Ryzen 5 8645HS or AMD A4-9120C - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.

The AMD Ryzen 5 8645HS has 6 cores with 12 threads and clocks with a maximum frequency of 5.00 GHz. Up to 256 GB of memory is supported in 2 memory channels. The AMD Ryzen 5 8645HS was released in Q1/2024.

The AMD A4-9120C has 2 cores with 2 threads and clocks with a maximum frequency of 2.40 GHz. The CPU supports up to 8 GB of memory in 1 memory channels. The AMD A4-9120C was released in Q1/2019.
AMD Ryzen 5 (85) Family AMD A (112)
AMD Ryzen 8040 (20) CPU group AMD A4-9000 (2)
7 Generation 6
Hawk Point (Zen 4) Architecture Stoney Ridge (Excavator)
Mobile Segment Mobile
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The AMD Ryzen 5 8645HS has 6 CPU cores and can calculate 12 threads in parallel. The clock frequency of the AMD Ryzen 5 8645HS is 4.30 GHz (5.00 GHz) while the AMD A4-9120C has 2 CPU cores and 2 threads can calculate simultaneously. The clock frequency of the AMD A4-9120C is at 1.60 GHz (2.40 GHz).
AMD Ryzen 5 8645HS Characteristic AMD A4-9120C
6 Cores 2
12 Threads 2
normal Core architecture normal
Yes Hyperthreading No
No Overclocking ? No
4.30 GHz Frequency 1.60 GHz
5.00 GHz Turbo Frequency (1 Core) 2.40 GHz
-- Turbo Frequency (All Cores) 2.00 GHz

Artificial Intelligence and Machine Learning

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor.
AMD Ryzen 5 8645HS Characteristic AMD A4-9120C
AMD Ryzen AI AI hardware --
AMD Ryzen™ AI AI specifications --

Internal Graphics

The AMD Ryzen 5 8645HS or AMD A4-9120C has integrated graphics, called iGPU for short. The iGPU uses the system's main memory as graphics memory and sits on the processor's die.
AMD Radeon 760M GPU AMD Radeon R4 (Stoney Ridge)
0.80 GHz GPU frequency 0.60 GHz
2.60 GHz GPU (Turbo) --
10 GPU Generation 7
4 nm Technology 28 nm
4 Max. displays 3
8 Compute units 3
512 Shader 192
Yes Hardware Raytracing No
AMD FSR Frame Generation No
32 GB Max. GPU Memory 2 GB
12 DirectX Version 12

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.
AMD Radeon 760M GPU AMD Radeon R4 (Stoney Ridge)
Decode / Encode Codec h265 / HEVC (8 bit) Decode
Decode / Encode Codec h265 / HEVC (10 bit) Decode
Decode / Encode Codec h264 Decode
Decode Codec VP9 Decode
Decode Codec VP8 Decode
Decode / Encode Codec AV1 No
Decode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
Decode / Encode Codec JPEG Decode / Encode

Memory & PCIe

The AMD Ryzen 5 8645HS can use up to 256 GB of memory in 2 memory channels. The maximum memory bandwidth is 120.0 GB/s. The AMD A4-9120C supports up to 8 GB of memory in 1 memory channels and achieves a memory bandwidth of up to 15.0 GB/s.
AMD Ryzen 5 8645HS Characteristic AMD A4-9120C
DDR5-4800, DDR5-5600, LPDDR5-6400, LPDDR5X-7500 Memory DDR4-1866
256 GB Max. Memory 8 GB
2 (Dual Channel) Memory channels 1 (Single Channel)
120.0 GB/s Max. Bandwidth 15.0 GB/s
Yes ECC No
6.00 MB L2 Cache --
16.00 MB L3 Cache 2.00 MB
4.0 PCIe version 3.0
20 PCIe lanes 8
39.4 GB/s PCIe Bandwidth 7.9 GB/s

Thermal Management

The thermal design power (TDP for short) of the AMD Ryzen 5 8645HS is 45 W, while the AMD A4-9120C has a TDP of 6 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently.
AMD Ryzen 5 8645HS Characteristic AMD A4-9120C
45 W TDP (PL1 / PBP) 6 W
-- TDP (PL2) --
54 W TDP up --
35 W TDP down --
100 °C Tjunction max. 90 °C

Technical details

The AMD Ryzen 5 8645HS is manufactured in 4 nm and has 22.00 MB cache. The AMD A4-9120C is manufactured in 28 nm and has a 2.00 MB cache.
AMD Ryzen 5 8645HS Characteristic AMD A4-9120C
4 nm Technology 28 nm
Monolithic Chip design Unknown
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 ISA extensions SSE4a, SSE4.1, SSE4.2, AVX, FMA3, FMA4
FP8 Socket FP4
AMD-V, SVM Virtualization AMD-V
Yes AES-NI Yes
Windows 10, Windows 11, Linux Operating systems
Q1/2024 Release date Q1/2019
-- Release price --
show more data show more data


Rate these processors

Here you can rate the AMD Ryzen 5 8645HS to help other visitors make their purchasing decisions. The average rating is 4.1 stars (8 ratings). Rate now:
Here you can rate the AMD A4-9120C to help other visitors make their purchasing decisions. The average rating is 1.0 stars (16 ratings). Rate now:


iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
AMD Ryzen 5 8645HS AMD Ryzen 5 8645HS
AMD Radeon 760M @ 2.60 GHz
2663 (100%)
AMD A4-9120C AMD A4-9120C
AMD Radeon R4 (Stoney Ridge) @ 0.60 GHz
230 (9%)

Cinebench 2024 (Single-Core)

The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
AMD Ryzen 5 8645HS AMD Ryzen 5 8645HS
6C 12T @ 5.00 GHz
99 (100%)
AMD A4-9120C AMD A4-9120C
2C 2T @ 2.40 GHz
0 (0%)

Cinebench 2024 (Multi-Core)

The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.
AMD Ryzen 5 8645HS AMD Ryzen 5 8645HS
6C 12T @ 5.00 GHz
702 (100%)
AMD A4-9120C AMD A4-9120C
2C 2T @ 2.40 GHz
0 (0%)

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
AMD Ryzen 5 8645HS AMD Ryzen 5 8645HS
6C 12T @ 5.00 GHz
1802 (100%)
AMD A4-9120C AMD A4-9120C
2C 2T @ 2.40 GHz
0 (0%)

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
AMD Ryzen 5 8645HS AMD Ryzen 5 8645HS
6C 12T @ 4.30 GHz
7768 (100%)
AMD A4-9120C AMD A4-9120C
2C 2T @ 2.00 GHz
0 (0%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
AMD Ryzen 5 8645HS AMD Ryzen 5 8645HS
6C 12T @ 5.00 GHz
2478 (100%)
AMD A4-9120C AMD A4-9120C
2C 2T @ 2.40 GHz
0 (0%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
AMD Ryzen 5 8645HS AMD Ryzen 5 8645HS
6C 12T @ 4.30 GHz
10357 (100%)
AMD A4-9120C AMD A4-9120C
2C 2T @ 2.00 GHz
0 (0%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
AMD Ryzen 5 8645HS AMD Ryzen 5 8645HS
6C 12T @ 4.30 GHz
0 (0%)
AMD A4-9120C AMD A4-9120C
2C 2T @ 2.00 GHz
1545 (100%)

Performance for Artificial Intelligence (AI) and Machine Learning (ML)

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. The performance is given in the number (trillions) of arithmetic operations per second (TOPS).
AMD Ryzen 5 8645HS AMD Ryzen 5 8645HS
6C 12T @ 4.30 GHz
16 (100%)
AMD A4-9120C AMD A4-9120C
2C 2T @ 1.60 GHz
0 (0%)

Devices using this processor
AMD Ryzen 5 8645HS AMD A4-9120C
Unknown Unknown

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