
Ryzen 7 7800X3D vs Atom x7405C

Ryzen 7 7800X3D

Atom x7405C
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Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Ryzen 7 7800X3D
Performance Per Dollar Atom x7405C
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 7 7800X3D | Atom x7405C |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($384) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Raphael (Zen4) (2022−2023) / 5 nm) | ✨ Modern (Amston Lake (2024−2025) / 10 nm) |
💎 Value Proposition
| Insight | Ryzen 7 7800X3D | Atom x7405C |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($384) | ✅ More affordable ($0) |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Ryzen 7 7800X3D and Atom x7405C

Ryzen 7 7800X3D
The Ryzen 7 7800X3D is manufactured by AMD. It was released in 4 January 2023 (2 years ago). It is based on the Raphael (Zen4) (2022−2023) architecture. It features 8 cores and 16 threads. Base frequency is 4.4 GHz, with boost up to 5 GHz. L3 cache: 96 MB (total). L2 cache: 1 MB (per core). Built on 5 nm process technology. Socket: AM5. Thermal design power (TDP): 120 Watt. Memory support: DDR5-5200. Passmark benchmark score: 34,293 points. Launch price was $449.

Atom x7405C
The Atom x7405C is manufactured by Intel. It was released in 8 April 2024 (1 year ago). It is based on the Amston Lake (2024−2025) architecture. It features 4 cores and 4 threads. Base frequency is 1.7 GHz, with boost up to 3.4 GHz. L3 cache: 6 MB (total). L2 cache: 2 MB (total). Built on 10 nm process technology. Socket: FCBGA1264. Thermal design power (TDP): 12 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 5,218 points. Launch price was $57.
Processing Power
The Ryzen 7 7800X3D packs 8 cores / 16 threads, while the Atom x7405C offers 4 cores / 4 threads — the Ryzen 7 7800X3D has 4 more cores. Boost clocks reach 5 GHz on the Ryzen 7 7800X3D versus 3.4 GHz on the Atom x7405C — a 38.1% clock advantage for the Ryzen 7 7800X3D (base: 4.4 GHz vs 1.7 GHz). The Ryzen 7 7800X3D uses the Raphael (Zen4) (2022−2023) architecture (5 nm), while the Atom x7405C uses Amston Lake (2024−2025) (10 nm). In PassMark, the Ryzen 7 7800X3D scores 34,293 against the Atom x7405C's 5,218 — a 147.2% lead for the Ryzen 7 7800X3D. L3 cache: 96 MB (total) on the Ryzen 7 7800X3D vs 6 MB (total) on the Atom x7405C.
| Feature | Ryzen 7 7800X3D | Atom x7405C |
|---|---|---|
| Cores / Threads | 8 / 16+100% | 4 / 4 |
| Boost Clock | 5 GHz+47% | 3.4 GHz |
| Base Clock | 4.4 GHz+159% | 1.7 GHz |
| L3 Cache | 96 MB (total)+1500% | 6 MB (total) |
| L2 Cache | 1 MB (per core) | 2 MB (total)+100% |
| Process | 5 nm-50% | 10 nm |
| Architecture | Raphael (Zen4) (2022−2023) | Amston Lake (2024−2025) |
| PassMark | 34,293+557% | 5,218 |
| Cinebench R23 Multi | 18,500 | — |
| Geekbench 6 Single | 2,700 | — |
| Geekbench 6 Multi | 15,000 | — |
Memory & Platform
The Ryzen 7 7800X3D uses the AM5 socket (PCIe 5.0), while the Atom x7405C uses FCBGA1264 (PCIe 4.0) — making them incompatible on the same motherboard. Both support up to DDR5-5200 memory speed. The Ryzen 7 7800X3D supports up to 128 GB of RAM compared to 16 GB — 155.6% more capacity for professional workloads. Memory channels: 2 (Ryzen 7 7800X3D) vs 1 (Atom x7405C). PCIe lanes: 28 (Ryzen 7 7800X3D) vs 9 (Atom x7405C) — the Ryzen 7 7800X3D offers 19 more lanes for additional GPUs or NVMe drives. Chipset compatibility: X670E,X670,B650E,B650,A620 (Ryzen 7 7800X3D) and Intel BGA1264 (Atom x7405C).
| Feature | Ryzen 7 7800X3D | Atom x7405C |
|---|---|---|
| Socket | AM5 | FCBGA1264 |
| PCIe Generation | PCIe 5.0+25% | PCIe 4.0 |
| Max RAM Speed | DDR5-5200 | DDR5-4800 |
| Max RAM Capacity | 128 GB+700% | 16 GB |
| RAM Channels | 2+100% | 1 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 28+211% | 9 |
Advanced Features
Virtualization: AMD-V (Ryzen 7 7800X3D) / not specified (Atom x7405C). Both include integrated graphics — AMD Radeon Graphics (2-core) (Ryzen 7 7800X3D) and Intel UHD Graphics (Atom x7405C) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Ryzen 7 7800X3D targets Gaming. Direct competitor: Ryzen 7 7800X3D rivals Intel Core i7-14700K.
| Feature | Ryzen 7 7800X3D | Atom x7405C |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | AMD Radeon Graphics (2-core) | Intel UHD Graphics |
| Unlocked | Yes | — |
| AVX-512 | Yes | — |
| Virtualization | AMD-V | — |
| Target Use | Gaming | — |
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