AMD EPYC 9734 vs Valve Steam Deck (AMD Custom APU 0405)
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CPU comparison with benchmarks
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| AMD EPYC 9734 | Valve Steam Deck (AMD Custom APU 0405) | |
CPU comparisonAMD EPYC 9734 or Valve Steam Deck (AMD Custom APU 0405) - 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 EPYC 9734 has 112 cores with 224 threads and clocks with a maximum frequency of 3.00 GHz. Up to 6144 GB of memory is supported in 12 memory channels. The AMD EPYC 9734 was released in Q2/2023. The Valve Steam Deck (AMD Custom APU 0405) has 4 cores with 8 threads and clocks with a maximum frequency of 3.50 GHz. The CPU supports up to 16 GB of memory in 4 memory channels. The Valve Steam Deck (AMD Custom APU 0405) was released in Q4/2021. |
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| AMD EPYC (129) | Family | AMD Ryzen 5 (85) |
| AMD EPYC 8004/9004 (15) | CPU group | AMD Aerith (Steam Deck) (1) |
| 4 | Generation | 3 |
| Bergamo/Siena (Zen 4c) | Architecture | Aerith (Zen 2) |
| Desktop / Server | Segment | Mobile |
| -- | Predecessor | -- |
| -- | Successor | Valve Steam Deck (2023 Refresh) |
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CPU Cores and Base FrequencyThe AMD EPYC 9734 is a 112 core processor with a clock frequency of 2.20 GHz (3.00 GHz). The Valve Steam Deck (AMD Custom APU 0405) has 4 CPU cores with a clock frequency of 2.40 GHz (3.50 GHz). |
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| AMD EPYC 9734 | Characteristic | Valve Steam Deck (AMD Custom APU 0405) |
| 112 | Cores | 4 |
| 224 | Threads | 8 |
| normal | Core architecture | normal |
| Yes | Hyperthreading | Yes |
| No | Overclocking ? | No |
| 2.20 GHz | Frequency | 2.40 GHz |
| 3.00 GHz | Turbo Frequency (1 Core) | 3.50 GHz |
| 3.00 GHz | Turbo Frequency (All Cores) | 2.80 GHz |
Internal GraphicsThe 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. |
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| no iGPU | GPU | AMD Custom Radeon Graphics (Steam Deck) |
| GPU frequency | 1.00 GHz | |
| -- | GPU (Turbo) | 1.60 GHz |
| -- | GPU Generation | -- |
| Technology | 7 nm | |
| Max. displays | 2 | |
| -- | Compute units | 8 |
| -- | Shader | 512 |
| No | Hardware Raytracing | No |
| No | Frame Generation | No |
| -- | Max. GPU Memory | 8 GB |
| -- | DirectX Version | 12 |
Hardware codec supportA 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. |
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| no iGPU | GPU | AMD Custom Radeon Graphics (Steam Deck) |
| No | Codec h265 / HEVC (8 bit) | Decode / Encode |
| No | Codec h265 / HEVC (10 bit) | Decode / Encode |
| No | Codec h264 | Decode / Encode |
| No | Codec VP9 | Decode / Encode |
| No | Codec VP8 | Decode / Encode |
| No | Codec AV1 | No |
| No | Codec AVC | Decode / Encode |
| No | Codec VC-1 | Decode |
| No | Codec JPEG | Decode / Encode |
Memory & PCIeThe AMD EPYC 9734 supports a maximum of 6144 GB of memory in 12 memory channels. The Valve Steam Deck (AMD Custom APU 0405) can connect up to 16 GB of memory in 4 memory channels. |
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| AMD EPYC 9734 | Characteristic | Valve Steam Deck (AMD Custom APU 0405) |
| DDR5-4800 | Memory | LPDDR5-5500 |
| 6144 GB | Max. Memory | 16 GB |
| 12 | Memory channels | 4 (Quad Channel) |
| 460.8 GB/s | Max. Bandwidth | 88.0 GB/s |
| Yes | ECC | No |
| -- | L2 Cache | 2.00 MB |
| 256.00 MB | L3 Cache | 4.00 MB |
| 5.0 | PCIe version | 3.0 |
| 128 | PCIe lanes | 8 |
| 504.1 GB/s | PCIe Bandwidth | 7.9 GB/s |
Thermal ManagementThe TDP (Thermal Design Power) of a processor specifies the required cooling solution. The AMD EPYC 9734 has a TDP of 340 W, that of the Valve Steam Deck (AMD Custom APU 0405) is 15 W. |
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| AMD EPYC 9734 | Characteristic | Valve Steam Deck (AMD Custom APU 0405) |
| 340 W | TDP (PL1 / PBP) | 15 W |
| -- | TDP (PL2) | -- |
| 400 W | TDP up | -- |
| 320 W | TDP down | 4 W |
| 100 °C | Tjunction max. | 100 °C |
Technical detailsThe AMD EPYC 9734 has a 256.00 MB cache, while the Valve Steam Deck (AMD Custom APU 0405) cache has a total of 6.00 MB. |
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| AMD EPYC 9734 | Characteristic | Valve Steam Deck (AMD Custom APU 0405) |
| 5 nm | Technology | 7 nm |
| Chiplet | Chip design | Monolithic |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| SSE4.2, AVX2, AVX-512, BFLOAT16, VNNI | ISA extensions | SSE4a, SSE4.1, SSE4.2, AVX2, FMA3 |
| SP5 | Socket | FF3 |
| AMD-V, SVM | Virtualization | AMD-V, SVM |
| Yes | AES-NI | Yes |
| Windows Server 2022, Linux, Windows 11 | Operating systems | SteamOS (Arch Linux) |
| Q2/2023 | Release date | Q4/2021 |
| 11900 $ | Release price | -- |
| show more data | show more data | |
112C 224T @ 2.20 GHz (3.00 GHz) buy now on Amazon and save!
4C 8T @ 2.40 GHz (3.50 GHz) buy now on Amazon and save!
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Rate these processors
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.
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AMD EPYC 9734
112C 224T @ 3.00 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz |
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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.
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AMD EPYC 9734
112C 224T @ 3.00 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz |
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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.
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AMD EPYC 9734
112C 224T @ 3.00 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz |
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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.
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AMD EPYC 9734
112C 224T @ 3.00 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.80 GHz |
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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.
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AMD EPYC 9734
112C 224T @ 3.00 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz |
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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.
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AMD EPYC 9734
112C 224T @ 3.00 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.80 GHz |
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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.
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AMD EPYC 9734
112C 224T @ 3.00 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz |
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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.
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AMD EPYC 9734
112C 224T @ 3.00 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.80 GHz |
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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.
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AMD EPYC 9734
@ 0.00 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
AMD Custom Radeon Graphics (Steam Deck) @ 1.60 GHz |
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Devices using this processor |
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| AMD EPYC 9734 | Valve Steam Deck (AMD Custom APU 0405) |
| Unknown | Valve Steam Deck |
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