AMD A8-3820 vs AMD Ryzen 5 7645HX

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CPU comparison with benchmarks


AMD A8-3820 CPU1 vs CPU2 AMD Ryzen 5 7645HX
AMD A8-3820 AMD Ryzen 5 7645HX

CPU comparison

In this CPU comparison, we compare the AMD A8-3820 and the AMD Ryzen 5 7645HX and use benchmarks to check which processor is faster.

We compare the AMD A8-3820 4 core processor released in Q4/2011 with the AMD Ryzen 5 7645HX which has 6 CPU cores and was introduced in Q1/2023.
AMD A (112) Family AMD Ryzen 5 (85)
AMD A8-3000 (4) CPU group AMD Ryzen 7045 (6)
1 Generation 6
Llano (K10) Architecture Dragon Range (Zen 4)
Desktop / Server Segment Mobile
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The AMD A8-3820 is a 4 core processor with a clock frequency of 2.50 GHz (2.80 GHz). The processor can compute 4 threads at the same time. The AMD Ryzen 5 7645HX clocks with 4.00 GHz (5.00 GHz), has 6 CPU cores and can calculate 12 threads in parallel.

AMD A8-3820 Characteristic AMD Ryzen 5 7645HX
4 Cores 6
4 Threads 12
normal Core architecture normal
No Hyperthreading Yes
Yes Overclocking ? Yes
2.50 GHz Frequency 4.00 GHz
2.80 GHz Turbo Frequency (1 Core) 5.00 GHz
2.80 GHz Turbo Frequency (All Cores) --

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 A8-3820 Characteristic AMD Ryzen 5 7645HX
-- AI hardware --
-- AI specifications --

Internal Graphics

Graphics (iGPU) integrated into the processor not only enable image output without having to rely on a dedicated graphics solution, but can also efficiently accelerate video playback.

AMD Radeon HD 6550D GPU AMD Radeon 610M
0.60 GHz GPU frequency 0.40 GHz
-- GPU (Turbo) 2.20 GHz
3 GPU Generation 9
32 nm Technology 6 nm
2 Max. displays 3
5 Compute units 2
400 Shader 128
No Hardware Raytracing Yes
No Frame Generation No
1 GB Max. GPU Memory 8 GB
11 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 HD 6550D GPU AMD Radeon 610M
No Codec h265 / HEVC (8 bit) Decode / Encode
No Codec h265 / HEVC (10 bit) Decode / Encode
Decode Codec h264 Decode / Encode
No Codec VP9 Decode / Encode
No Codec VP8 Decode / Encode
No Codec AV1 Decode
Decode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
Decode / Encode Codec JPEG Decode / Encode

Memory & PCIe

Up to GB of memory in a maximum of 2 memory channels is supported by the AMD A8-3820, while the AMD Ryzen 5 7645HX supports a maximum of 128 GB of memory with a maximum memory bandwidth of 83.2 GB/s enabled.

AMD A8-3820 Characteristic AMD Ryzen 5 7645HX
DDR3-1600 Memory DDR5-5200
Max. Memory 128 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
25.6 GB/s Max. Bandwidth 83.2 GB/s
No ECC Yes
-- L2 Cache 6.00 MB
4.00 MB L3 Cache 32.00 MB
-- PCIe version 5.0
-- PCIe lanes 28
-- PCIe Bandwidth 110.3 GB/s

Thermal Management

The AMD A8-3820 has a TDP of 65 W. The TDP of the AMD Ryzen 5 7645HX is 55 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

AMD A8-3820 Characteristic AMD Ryzen 5 7645HX
65 W TDP (PL1 / PBP) 55 W
-- TDP (PL2) --
-- TDP up 75 W
-- TDP down 45 W
-- Tjunction max. 100 °C

Technical details

The AMD A8-3820 has 4.00 MB cache and is manufactured in 32 nm. The cache of AMD Ryzen 5 7645HX is at 38.00 MB. The processor is manufactured in 5 nm.

AMD A8-3820 Characteristic AMD Ryzen 5 7645HX
32 nm Technology 5 nm
Unknown Chip design Chiplet
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE3, SSE4a ISA extensions SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512
FM1 Socket FL1
AMD-V Virtualization AMD-V, SVM
No AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Windows 11, Linux
Q4/2011 Release date Q1/2023
85 $ Release price --
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Rate these processors

Here you can rate the AMD A8-3820 to help other visitors make their purchasing decisions. The average rating is 2.5 stars (2 ratings). Rate now:
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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 A8-3820 AMD A8-3820
AMD Radeon HD 6550D @ 0.60 GHz
480 (100%)
AMD Ryzen 5 7645HX AMD Ryzen 5 7645HX
AMD Radeon 610M @ 2.20 GHz
443 (92%)

Cinebench R23 (Single-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
AMD A8-3820 AMD A8-3820
4C 4T @ 2.80 GHz
0 (0%)
AMD Ryzen 5 7645HX AMD Ryzen 5 7645HX
6C 12T @ 5.00 GHz
1802 (100%)

Cinebench R23 (Multi-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
AMD A8-3820 AMD A8-3820
4C 4T @ 2.80 GHz
0 (0%)
AMD Ryzen 5 7645HX AMD Ryzen 5 7645HX
6C 12T @ 4.00 GHz
13824 (100%)

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 A8-3820 AMD A8-3820
4C 4T @ 2.80 GHz
354 (100%)
AMD Ryzen 5 7645HX AMD Ryzen 5 7645HX
6C 12T @ 5.00 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 A8-3820 AMD A8-3820
4C 4T @ 2.80 GHz
1264 (100%)
AMD Ryzen 5 7645HX AMD Ryzen 5 7645HX
6C 12T @ 4.00 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 A8-3820 AMD A8-3820
4C 4T @ 2.80 GHz
2162 (100%)
AMD Ryzen 5 7645HX AMD Ryzen 5 7645HX
6C 12T @ 4.00 GHz
0 (0%)

CPU performance per watt (efficiency)

Efficiency of the processor under full load in the Cinebench R23 (multi-core) benchmark. The benchmark result is divided by the average energy required (CPU package power in watts). The higher the value, the more efficient the CPU is under full load.
AMD A8-3820 AMD A8-3820
2.50 GHz
0 (0%)
AMD Ryzen 5 7645HX AMD Ryzen 5 7645HX
13,824 CB R23 MC @ 51 W
270 (100%)

Devices using this processor

AMD A8-3820 AMD Ryzen 5 7645HX
Unknown Unknown

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