Valve Steam Deck (AMD Custom APU 0405) vs AMD Ryzen Z1

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CPU comparison with benchmarks


Valve Steam Deck (AMD Custom APU 0405) CPU1 vs CPU2 AMD Ryzen Z1
Valve Steam Deck (AMD Custom APU 0405) AMD Ryzen Z1

CPU comparison

Valve Steam Deck (AMD Custom APU 0405) or AMD Ryzen Z1 - 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 Z1 has 6 cores with 12 threads and clocks with a maximum frequency of 4.90 GHz. The CPU supports up to 256 GB of memory in 2 memory channels. The AMD Ryzen Z1 was released in Q3/2023.
AMD Ryzen 5 (84) Family AMD Ryzen Z1 (2)
AMD Aerith (Steam Deck) (1) CPU group AMD Ryzen 7040 (21)
3 Generation 6
Aerith (Zen 2) Architecture Phoenix (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 Z1 has 6 CPU cores with a clock frequency of 3.50 GHz (4.90 GHz).

Valve Steam Deck (AMD Custom APU 0405) Characteristic AMD Ryzen Z1
4 Cores 6
8 Threads 12
normal Core architecture normal
Yes Hyperthreading Yes
No Overclocking ? No
2.40 GHz Frequency 3.50 GHz
3.50 GHz Turbo Frequency (1 Core) 4.90 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.

Valve Steam Deck (AMD Custom APU 0405) Characteristic AMD Ryzen Z1
-- 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.

AMD Custom Radeon Graphics (Steam Deck) GPU AMD Radeon 740M
1.00 GHz GPU frequency 0.80 GHz
1.60 GHz GPU (Turbo) 2.50 GHz
-- GPU Generation 10
7 nm Technology 4 nm
2 Max. displays 4
8 Compute units 4
512 Shader 256
No Hardware Raytracing Yes
No Frame Generation AMD FSR
8 GB Max. GPU Memory 32 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 740M
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
Decode / Encode Codec VP8 Decode
No Codec AV1 Decode / Encode
Decode / Encode Codec AVC Decode
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 Z1 can connect up to 256 GB of memory in 2 memory channels.

Valve Steam Deck (AMD Custom APU 0405) Characteristic AMD Ryzen Z1
LPDDR5-5500 Memory DDR5-4800, DDR5-5600, LPDDR5-6400, LPDDR5X-7500
16 GB Max. Memory 256 GB
4 (Quad Channel) Memory channels 2 (Dual Channel)
88.0 GB/s Max. Bandwidth 120.0 GB/s
No ECC Yes
2.00 MB L2 Cache 6.00 MB
4.00 MB L3 Cache 16.00 MB
3.0 PCIe version 4.0
8 PCIe lanes 20
7.9 GB/s PCIe Bandwidth 39.4 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 Z1 is 15 W.

Valve Steam Deck (AMD Custom APU 0405) Characteristic AMD Ryzen Z1
15 W TDP (PL1 / PBP) 15 W
-- TDP (PL2) --
-- TDP up 30 W
4 W TDP down 15 W
100 °C Tjunction max. 100 °C

Technical details

The Valve Steam Deck (AMD Custom APU 0405) has a 6.00 MB cache, while the AMD Ryzen Z1 cache has a total of 22.00 MB.

Valve Steam Deck (AMD Custom APU 0405) Characteristic AMD Ryzen Z1
7 nm Technology 4 nm
Monolithic Chip design Monolithic
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 FP8
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


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Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
Valve Steam Deck (AMD Custom APU 0405) (47%)
AMD Ryzen Z1 (100%)
⌀ Multi core performance in 1 CPU benchmarks
Valve Steam Deck (AMD Custom APU 0405) (47%)
AMD Ryzen Z1 (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) Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz
849 (47%)
AMD Ryzen Z1 AMD Ryzen Z1
6C 12T @ 4.90 GHz
1821 (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) Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.80 GHz
3592 (47%)
AMD Ryzen Z1 AMD Ryzen Z1
6C 12T @ 3.50 GHz
7706 (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) Valve Steam Deck (AMD Custom APU 0405)
AMD Custom Radeon Graphics (Steam Deck) @ 1.60 GHz
1638 (100%)
AMD Ryzen Z1 AMD Ryzen Z1
AMD Radeon 740M @ 2.50 GHz
1280 (78%)

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) Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz
57 (100%)
AMD Ryzen Z1 AMD Ryzen Z1
6C 12T @ 4.90 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) Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz
275 (100%)
AMD Ryzen Z1 AMD Ryzen Z1
6C 12T @ 4.90 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.
Valve Steam Deck (AMD Custom APU 0405) Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz
975 (100%)
AMD Ryzen Z1 AMD Ryzen Z1
6C 12T @ 4.90 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.
Valve Steam Deck (AMD Custom APU 0405) Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.80 GHz
4359 (100%)
AMD Ryzen Z1 AMD Ryzen Z1
6C 12T @ 3.50 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.
Valve Steam Deck (AMD Custom APU 0405) Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz
1278 (100%)
AMD Ryzen Z1 AMD Ryzen Z1
6C 12T @ 4.90 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.
Valve Steam Deck (AMD Custom APU 0405) Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.80 GHz
4365 (100%)
AMD Ryzen Z1 AMD Ryzen Z1
6C 12T @ 3.50 GHz
0 (0%)

Devices using this processor

Valve Steam Deck (AMD Custom APU 0405) AMD Ryzen Z1
Valve Steam Deck Unknown

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