AMD Ryzen 7 PRO 7840U | Valve Steam Deck (AMD Custom APU 0405) | |
CPU comparisonAMD Ryzen 7 PRO 7840U 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 Ryzen 7 PRO 7840U has 8 cores with 16 threads and clocks with a maximum frequency of 5.10 GHz. Up to 256 GB of memory is supported in 2 memory channels. The AMD Ryzen 7 PRO 7840U 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 Ryzen 7 PRO (21) | Family | AMD Ryzen 5 (86) |
AMD Ryzen 7040 (21) | CPU group | AMD Aerith (Steam Deck) (1) |
6 | Generation | 3 |
Phoenix (Zen 4) | Architecture | Aerith (Zen 2) |
Mobile | Segment | Mobile |
-- | Predecessor | -- |
AMD Ryzen 7 PRO 8840U | Successor | Valve Steam Deck (2023 Refresh) |
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CPU Cores and Base FrequencyThe AMD Ryzen 7 PRO 7840U has 8 CPU cores and can calculate 16 threads in parallel. The clock frequency of the AMD Ryzen 7 PRO 7840U is 3.30 GHz (5.10 GHz) while the Valve Steam Deck (AMD Custom APU 0405) has 4 CPU cores and 8 threads can calculate simultaneously. The clock frequency of the Valve Steam Deck (AMD Custom APU 0405) is at 2.40 GHz (3.50 GHz). |
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AMD Ryzen 7 PRO 7840U | Characteristic | Valve Steam Deck (AMD Custom APU 0405) |
8 | Cores | 4 |
16 | Threads | 8 |
normal | Core architecture | normal |
Yes | Hyperthreading | Yes |
No | Overclocking ? | No |
3.30 GHz | Frequency | 2.40 GHz |
5.10 GHz | Turbo Frequency (1 Core) | 3.50 GHz |
-- | Turbo Frequency (All Cores) | 2.80 GHz |
NPU AI performanceThe 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. |
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AMD Ryzen 7 PRO 7840U | Characteristic | Valve Steam Deck (AMD Custom APU 0405) |
AMD Ryzen™ AI | AI hardware | -- |
AMD dedicated AI XDNA Technology | AI specifications | -- |
-- | NPU + CPU + iGPU | -- |
Integrated graphics (iGPU)The AMD Ryzen 7 PRO 7840U or Valve Steam Deck (AMD Custom APU 0405) has integrated graphics, called iGPU for short. The iGPU uses the system's main memory as graphics memory and sits on the processor's die. |
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AMD Radeon 780M | GPU | AMD Custom Radeon Graphics (Steam Deck) |
0.80 GHz | GPU frequency | 1.00 GHz |
2.70 GHz | GPU (Turbo) | 1.60 GHz |
3 | GPU Generation | -- |
4 nm | Technology | 7 nm |
4 | Max. displays | 2 |
12 | Compute units | 8 |
768 | Shader | 512 |
Yes | Hardware Raytracing | No |
AMD FSR | Frame Generation | No |
32 GB | Max. GPU Memory | 8 GB |
12 | 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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AMD Radeon 780M | GPU | AMD Custom Radeon Graphics (Steam Deck) |
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 | Codec VP9 | Decode / Encode |
Decode | Codec VP8 | Decode / Encode |
Decode / Encode | Codec AV1 | No |
Decode | Codec AVC | Decode / Encode |
Decode | Codec VC-1 | Decode |
Decode / Encode | Codec JPEG | Decode / Encode |
Memory & PCIeThe AMD Ryzen 7 PRO 7840U can use up to 256 GB of memory in 2 memory channels. The maximum memory bandwidth is 120.0 GB/s. The Valve Steam Deck (AMD Custom APU 0405) supports up to 16 GB of memory in 4 memory channels and achieves a memory bandwidth of up to 88.0 GB/s. |
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AMD Ryzen 7 PRO 7840U | Characteristic | Valve Steam Deck (AMD Custom APU 0405) |
DDR5-4800, DDR5-5600, LPDDR5-6400, LPDDR5X-7500 | Memory | LPDDR5-5500 |
256 GB | Max. Memory | 16 GB |
2 (Dual Channel) | Memory channels | 4 (Quad Channel) |
120.0 GB/s | Max. Bandwidth | 88.0 GB/s |
Yes | ECC | No |
8.00 MB | L2 Cache | 2.00 MB |
16.00 MB | L3 Cache | 4.00 MB |
4.0 | PCIe version | 3.0 |
20 | PCIe lanes | 8 |
39.4 GB/s | PCIe Bandwidth | 7.9 GB/s |
Thermal ManagementThe thermal design power (TDP for short) of the AMD Ryzen 7 PRO 7840U is 28 W, while the Valve Steam Deck (AMD Custom APU 0405) has a TDP of 15 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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AMD Ryzen 7 PRO 7840U | Characteristic | Valve Steam Deck (AMD Custom APU 0405) |
28 W | TDP (PL1 / PBP) | 15 W |
-- | TDP (PL2) | -- |
30 W | TDP up | -- |
15 W | TDP down | 4 W |
100 °C | Tjunction max. | 100 °C |
Technical detailsThe AMD Ryzen 7 PRO 7840U is manufactured in 4 nm and has 24.00 MB cache. The Valve Steam Deck (AMD Custom APU 0405) is manufactured in 7 nm and has a 6.00 MB cache. |
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AMD Ryzen 7 PRO 7840U | Characteristic | Valve Steam Deck (AMD Custom APU 0405) |
4 nm | Technology | 7 nm |
Monolithic | Chip design | Monolithic |
x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 | ISA extensions | SSE4a, SSE4.1, SSE4.2, AVX2, FMA3 |
FP8 | Socket | FF3 |
AMD-V, SVM | Virtualization | AMD-V, SVM |
Yes | AES-NI | Yes |
Windows 10, Windows 11, Linux | Operating systems | SteamOS (Arch Linux) |
Q2/2023 | Release date | Q4/2021 |
-- | Release price | -- |
show more data | show more data | |
AMD Ryzen 7 PRO 7840U
8C 16T @ 5.10 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz |
AMD Ryzen 7 PRO 7840U
8C 16T @ 3.30 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.80 GHz |
AMD Ryzen 7 PRO 7840U
8C 16T @ 5.10 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz |
AMD Ryzen 7 PRO 7840U
8C 16T @ 3.30 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.80 GHz |
AMD Ryzen 7 PRO 7840U
8C 16T @ 5.10 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz |
AMD Ryzen 7 PRO 7840U
8C 16T @ 3.30 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.80 GHz |
AMD Ryzen 7 PRO 7840U
AMD Radeon 780M @ 2.70 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
AMD Custom Radeon Graphics (Steam Deck) @ 1.60 GHz |
AMD Ryzen 7 PRO 7840U
8C 16T @ 5.10 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz |
AMD Ryzen 7 PRO 7840U
8C 16T @ 5.10 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 3.50 GHz |
AMD Ryzen 7 PRO 7840U
8C 16T @ 3.30 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.80 GHz |
AMD Ryzen 7 PRO 7840U
8C 16T @ 3.30 GHz |
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Valve Steam Deck (AMD Custom APU 0405)
4C 8T @ 2.40 GHz |
Devices using this processor |
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AMD Ryzen 7 PRO 7840U | Valve Steam Deck (AMD Custom APU 0405) |
Unknown | Valve Steam Deck |