AMD Ryzen 9 3900XT vs AMD A9-9420

Last updated: 2024-04-12

CPU comparison with benchmarks


AMD Ryzen 9 3900XT		AMD A9-9420
CPU comparison AMD Ryzen 9 3900XT or AMD A9-9420 - 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 9 3900XT has 12 cores with 24 threads and clocks with a maximum frequency of 4.70 GHz. Up to 128 GB of memory is supported in 2 memory channels. The AMD Ryzen 9 3900XT was released in Q2/2020. The AMD A9-9420 has 2 cores with 2 threads and clocks with a maximum frequency of 3.60 GHz. The CPU supports up to 8 GB of memory in 1 memory channels. The AMD A9-9420 was released in Q2/2017.

AMD Ryzen 9 (35)	Family	AMD A (112)
AMD Ryzen 3000 (15)	CPU group	AMD A9-9000 (4)
3	Generation	4
Matisse (Zen 2)	Architecture	Stoney Ridge (Excavator)
Desktop / Server	Segment	Mobile
--	Predecessor	--
--	Successor	--

CPU Cores and Base Frequency The AMD Ryzen 9 3900XT is a 12 core processor with a clock frequency of 4.10 GHz (4.70 GHz). The AMD A9-9420 has 2 CPU cores with a clock frequency of 3.00 GHz (3.60 GHz).
AMD Ryzen 9 3900XT	Characteristic	AMD A9-9420
12	Cores	2
24	Threads	2
normal	Core architecture	normal
Yes	Hyperthreading	No
Yes	Overclocking ?	No
4.10 GHz	Frequency	3.00 GHz
4.70 GHz	Turbo Frequency (1 Core)	3.60 GHz
4.60 GHz	Turbo Frequency (All Cores)	3.00 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 9 3900XT	Characteristic	AMD A9-9420
--	AI hardware	--
--	AI specifications	--

Internal Graphics The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs.
no iGPU	GPU	AMD Radeon R5 (Stoney Ridge)
	GPU frequency	0.85 GHz
--	GPU (Turbo)	--
--	GPU Generation	7
	Technology	28 nm
	Max. displays	3
--	Compute units	3
--	Shader	192
No	Hardware Raytracing	No
No	Frame Generation	No
--	Max. GPU Memory	2 GB
--	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.
no iGPU	GPU	AMD Radeon R5 (Stoney Ridge)
No	Codec h265 / HEVC (8 bit)	Decode
No	Codec h265 / HEVC (10 bit)	Decode
No	Codec h264	Decode
No	Codec VP9	Decode
No	Codec VP8	Decode
No	Codec AV1	No
No	Codec AVC	Decode / Encode
No	Codec VC-1	Decode
No	Codec JPEG	Decode / Encode

Memory & PCIe The AMD Ryzen 9 3900XT supports a maximum of 128 GB of memory in 2 memory channels. The AMD A9-9420 can connect up to 8 GB of memory in 1 memory channels.
AMD Ryzen 9 3900XT	Characteristic	AMD A9-9420
DDR4-3200	Memory	DDR4-2133
128 GB	Max. Memory	8 GB
2 (Dual Channel)	Memory channels	1 (Single Channel)
51.2 GB/s	Max. Bandwidth	17.1 GB/s
Yes	ECC	No
--	L2 Cache	--
64.00 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 TDP (Thermal Design Power) of a processor specifies the required cooling solution. The AMD Ryzen 9 3900XT has a TDP of 105 W, that of the AMD A9-9420 is 15 W.
AMD Ryzen 9 3900XT	Characteristic	AMD A9-9420
105 W	TDP (PL1 / PBP)	15 W
142 W	TDP (PL2)	--
--	TDP up	25 W
--	TDP down	10 W
95 °C	Tjunction max.	90 °C
Technical details The AMD Ryzen 9 3900XT has a 64.00 MB cache, while the AMD A9-9420 cache has a total of 2.00 MB.
AMD Ryzen 9 3900XT	Characteristic	AMD A9-9420
7 nm	Technology	28 nm
Chiplet	Chip design	Unknown
x86-64 (64 bit)	Instruction set (ISA)	x86-64 (64 bit)
SSE4a, SSE4.1, SSE4.2, AVX2, FMA3	ISA extensions	SSE4a, SSE4.1, SSE4.2, AVX, FMA3, FMA4
AM4 (PGA 1331)	Socket	FP4
AMD-V, SVM	Virtualization	AMD-V
Yes	AES-NI	Yes
Windows 10, Windows 11, Linux	Operating systems
Q2/2020	Release date	Q2/2017
--	Release price	--

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AMD Ryzen 9 3900XT 12C 24T @ 4.10 GHz (4.70 GHz) buy now on Amazon and save! AMD A9-9420 2C 2T @ 3.00 GHz (3.60 GHz) buy now on Amazon and save!

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Average performance in benchmarks

⌀ Single core performance in 2 CPU benchmarks

AMD Ryzen 9 3900XT (100%)

AMD A9-9420 (36%)

⌀ Multi core performance in 4 CPU benchmarks

AMD Ryzen 9 3900XT (100%)

AMD A9-9420 (5%)

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 9 3900XT 12C 24T @ 4.70 GHz	1414 (100%)
	AMD A9-9420 2C 2T @ 3.60 GHz	497 (35%)

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 9 3900XT 12C 24T @ 4.60 GHz	12974 (100%)
	AMD A9-9420 2C 2T @ 3.00 GHz	805 (6%)

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 9 3900XT 12C 24T @ 4.60 GHz	32790 (100%)
	AMD A9-9420 2C 2T @ 3.00 GHz	2348 (7%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.


	AMD Ryzen 9 3900XT 12C 24T @ 4.10 GHz	8118 (100%)
	AMD A9-9420 2C 2T @ 3.00 GHz	328 (4%)

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 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 Ryzen 9 3900XT 12C 24T @ 4.70 GHz	219 (100%)
	AMD A9-9420 2C 2T @ 3.60 GHz	81 (37%)

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 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 Ryzen 9 3900XT 12C 24T @ 4.60 GHz	3192 (100%)
	AMD A9-9420 2C 2T @ 3.00 GHz	134 (4%)

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 9 3900XT 12C 24T @ 4.70 GHz	78 (100%)
	AMD A9-9420 2C 2T @ 3.60 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 9 3900XT 12C 24T @ 4.70 GHz	1074 (100%)
	AMD A9-9420 2C 2T @ 3.60 GHz	0 (0%)

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 Ryzen 9 3900XT 12C 24T @ 4.70 GHz	1354 (100%)
	AMD A9-9420 2C 2T @ 3.60 GHz	0 (0%)

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 Ryzen 9 3900XT 12C 24T @ 4.60 GHz	18511 (100%)
	AMD A9-9420 2C 2T @ 3.00 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 9 3900XT 12C 24T @ 4.70 GHz	1719 (100%)
	AMD A9-9420 2C 2T @ 3.60 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 9 3900XT 12C 24T @ 4.60 GHz	10689 (100%)
	AMD A9-9420 2C 2T @ 3.00 GHz	0 (0%)

Cinebench R20 (Single-Core)

Cinebench R20 is the successor of Cinebench R15 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 Ryzen 9 3900XT 12C 24T @ 4.70 GHz	539 (100%)
	AMD A9-9420 2C 2T @ 3.60 GHz	0 (0%)

Cinebench R20 (Multi-Core)

Cinebench R20 is the successor of Cinebench R15 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 Ryzen 9 3900XT 12C 24T @ 4.60 GHz	7244 (100%)
	AMD A9-9420 2C 2T @ 3.00 GHz	0 (0%)

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 9 3900XT @ 0.00 GHz	0 (0%)
	AMD A9-9420 AMD Radeon R5 (Stoney Ridge) @ 0.85 GHz	325 (100%)

Devices using this processor
AMD Ryzen 9 3900XT	AMD A9-9420
Unknown	Unknown

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