Valve Steam Deck (AMD Custom APU 0405) vs AMD Ryzen 9 7945HX3D

Last updated: 2024-01-23

CPU comparison with benchmarks


Valve Steam Deck (AMD Custom APU 0405)		AMD Ryzen 9 7945HX3D
CPU comparison Valve Steam Deck (AMD Custom APU 0405) or AMD Ryzen 9 7945HX3D - 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 Valve Steam Deck (AMD Custom APU 0405) has 4 cores with 8 threads and clocks with a maximum frequency of 3.50 GHz. Up to 16 GB of memory is supported in 4 memory channels. The Valve Steam Deck (AMD Custom APU 0405) was released in Q4/2021. The AMD Ryzen 9 7945HX3D has 16 cores with 32 threads and clocks with a maximum frequency of 5.40 GHz. The CPU supports up to 64 GB of memory in 2 memory channels. The AMD Ryzen 9 7945HX3D was released in Q3/2023.

AMD Ryzen 5 (86)	Family	AMD Ryzen 9 (40)
AMD Aerith (Steam Deck) (1)	CPU group	AMD Ryzen 7045 (6)
3	Generation	6
Aerith (Zen 2)	Architecture	Dragon Range (Zen 4)
Mobile	Segment	Mobile
--	Predecessor	--
Valve Steam Deck (2023 Refresh)	Successor	--

CPU Cores and Base Frequency The Valve Steam Deck (AMD Custom APU 0405) is a 4 core processor with a clock frequency of 2.40 GHz (3.50 GHz). The AMD Ryzen 9 7945HX3D has 16 CPU cores with a clock frequency of 2.30 GHz (5.40 GHz).
Valve Steam Deck (AMD Custom APU 0405)	Characteristic	AMD Ryzen 9 7945HX3D
4	Cores	16
8	Threads	32
normal	Core architecture	normal
Yes	Hyperthreading	Yes
No	Overclocking ?	No
2.40 GHz	Frequency	2.30 GHz
3.50 GHz	Turbo Frequency (1 Core)	5.40 GHz
2.80 GHz	Turbo Frequency (All Cores)	--


NPU AI performance The performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors.
Valve Steam Deck (AMD Custom APU 0405)	Characteristic	AMD Ryzen 9 7945HX3D
--	AI hardware	--
--	AI specifications	--
--	NPU + CPU + iGPU	--

Integrated graphics (iGPU) 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.
AMD Custom Radeon Graphics (Steam Deck)	GPU	AMD Radeon 610M
1.00 GHz	GPU frequency	0.40 GHz
1.60 GHz	GPU (Turbo)	2.20 GHz
--	GPU Generation	9
7 nm	Technology	6 nm
2	Max. displays	3
8	Compute units	2
512	Shader	128
No	Hardware Raytracing	Yes
No	Frame Generation	No
8 GB	Max. GPU Memory	8 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 Custom Radeon Graphics (Steam Deck)	GPU	AMD Radeon 610M
Decode / Encode	Codec h265 / HEVC (8 bit)	Decode / Encode
Decode / Encode	Codec h265 / HEVC (10 bit)	Decode / Encode
Decode / Encode	Codec h264	Decode / Encode
Decode / Encode	Codec VP9	Decode / Encode
Decode / Encode	Codec VP8	Decode / Encode
No	Codec AV1	Decode
Decode / Encode	Codec AVC	Decode / Encode
Decode	Codec VC-1	Decode
Decode / Encode	Codec JPEG	Decode / Encode

Memory & PCIe The Valve Steam Deck (AMD Custom APU 0405) supports a maximum of 16 GB of memory in 4 memory channels. The AMD Ryzen 9 7945HX3D can connect up to 64 GB of memory in 2 memory channels.
Valve Steam Deck (AMD Custom APU 0405)	Characteristic	AMD Ryzen 9 7945HX3D
LPDDR5-5500	Memory	DDR5-5200
16 GB	Max. Memory	64 GB
4 (Quad Channel)	Memory channels	2 (Dual Channel)
88.0 GB/s	Max. Bandwidth	83.2 GB/s
No	ECC	No
2.00 MB	L2 Cache	16.00 MB
4.00 MB	L3 Cache	128.00 MB
3.0	PCIe version	5.0
8	PCIe lanes	28
7.9 GB/s	PCIe Bandwidth	110.3 GB/s
Thermal Management The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Valve Steam Deck (AMD Custom APU 0405) has a TDP of 15 W, that of the AMD Ryzen 9 7945HX3D is 55 W.
Valve Steam Deck (AMD Custom APU 0405)	Characteristic	AMD Ryzen 9 7945HX3D
15 W	TDP (PL1 / PBP)	55 W
--	TDP (PL2)	--
--	TDP up	75 W
4 W	TDP down	--
100 °C	Tjunction max.	89 °C
Technical details The Valve Steam Deck (AMD Custom APU 0405) has a 6.00 MB cache, while the AMD Ryzen 9 7945HX3D cache has a total of 144.00 MB.
Valve Steam Deck (AMD Custom APU 0405)	Characteristic	AMD Ryzen 9 7945HX3D
7 nm	Technology	5 nm
Monolithic	Chip design	Chiplet
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,FMA3, AVX2, AVX512
FF3	Socket	FL1
AMD-V, SVM	Virtualization	AMD-V, SVM
Yes	AES-NI	Yes
SteamOS (Arch Linux)	Operating systems	Windows 10, Windows 11, Linux
Q4/2021	Release date	Q3/2023
--	Release price	--

show more data		show more data

Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 2.40 GHz (3.50 GHz) buy now on Amazon and save! AMD Ryzen 9 7945HX3D 16C 32T @ 2.30 GHz (5.40 GHz) buy now on Amazon and save!

Rate these processors

Average performance in benchmarks

⌀ Single core performance in 3 CPU benchmarks

Valve Steam Deck (AMD Custom APU 0405) (45%)

AMD Ryzen 9 7945HX3D (100%)

⌀ Multi core performance in 3 CPU benchmarks

Valve Steam Deck (AMD Custom APU 0405) (19%)

AMD Ryzen 9 7945HX3D (100%)

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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 3.50 GHz	975 (50%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 5.40 GHz	1931 (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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 2.80 GHz	4359 (13%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 2.30 GHz	33450 (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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 3.50 GHz	849 (40%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 5.40 GHz	2138 (100%)

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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 2.80 GHz	3592 (18%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 2.30 GHz	19880 (100%)

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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 3.50 GHz	1278 (46%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 5.40 GHz	2783 (100%)

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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 2.80 GHz	4365 (27%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 2.30 GHz	16080 (100%)

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.


	Valve Steam Deck (AMD Custom APU 0405) AMD Custom Radeon Graphics (Steam Deck) @ 1.60 GHz	1638 (100%)
	AMD Ryzen 9 7945HX3D AMD Radeon 610M @ 2.20 GHz	443 (27%)

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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 3.50 GHz	57 (100%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 5.40 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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 3.50 GHz	275 (100%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 5.40 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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 3.50 GHz	0 (0%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 5.40 GHz	747 (100%)

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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 2.80 GHz	0 (0%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 2.30 GHz	13036 (100%)

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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 3.50 GHz	0 (0%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 5.40 GHz	310 (100%)

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.


	Valve Steam Deck (AMD Custom APU 0405) 4C 8T @ 2.80 GHz	0 (0%)
	AMD Ryzen 9 7945HX3D 16C 32T @ 2.30 GHz	5602 (100%)

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.


	Valve Steam Deck (AMD Custom APU 0405) 2.40 GHz	0 (0%)
	AMD Ryzen 9 7945HX3D 33,450 CB R23 MC @ 104 W	322 (100%)

Devices using this processor
Valve Steam Deck (AMD Custom APU 0405)	AMD Ryzen 9 7945HX3D
Valve Steam Deck	ASUS ROG Strix SCAR 17 X3D

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