Ryzen 7 5800X vs A6-6400B
Ryzen 7 5800X
A6-6400B
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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 5800X
Performance Per Dollar A6-6400B
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 7 5800X | A6-6400B |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($180) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Vermeer (Zen 3) (2020−2022) / 7 nm, 12 nm) | 🛑 Legacy (Richland (2013−2014) / 32 nm) |
💎 Value Proposition
| Insight | Ryzen 7 5800X | A6-6400B |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($180) | ✅ 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 5800X and A6-6400B
Ryzen 7 5800X
The Ryzen 7 5800X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen 3) (2020−2022) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 4.7 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4. Passmark benchmark score: 27,712 points. Launch price was $449.
A6-6400B
The A6-6400B is manufactured by AMD. It was released in 2014-01-01. It is based on the Richland (2013−2014) architecture. It features 2 cores and 2 threads. Base frequency is 3.9 GHz, with boost up to 4.1 GHz. L2 cache: 1 MB (total). Built on 32 nm process technology. Socket: FM2. Thermal design power (TDP): 65 Watt. Memory support: DDR3-1866. Passmark benchmark score: 1,573 points. Launch price was $70.
Processing Power
The Ryzen 7 5800X packs 8 cores / 16 threads, while the A6-6400B offers 2 cores / 2 threads — the Ryzen 7 5800X has 6 more cores. Boost clocks reach 4.7 GHz on the Ryzen 7 5800X versus 4.1 GHz on the A6-6400B — a 13.6% clock advantage for the Ryzen 7 5800X (base: 3.8 GHz vs 3.9 GHz). The Ryzen 7 5800X uses the Vermeer (Zen 3) (2020−2022) architecture (7 nm, 12 nm), while the A6-6400B uses Richland (2013−2014) (32 nm). In PassMark, the Ryzen 7 5800X scores 27,712 against the A6-6400B's 1,573 — a 178.5% lead for the Ryzen 7 5800X.
| Feature | Ryzen 7 5800X | A6-6400B |
|---|---|---|
| Cores / Threads | 8 / 16+300% | 2 / 2 |
| Boost Clock | 4.7 GHz+15% | 4.1 GHz |
| Base Clock | 3.8 GHz | 3.9 GHz+3% |
| L3 Cache | 32 MB | — |
| L2 Cache | 512K (per core) | 1 MB (total)+100% |
| Process | 7 nm, 12 nm-78% | 32 nm |
| Architecture | Vermeer (Zen 3) (2020−2022) | Richland (2013−2014) |
| PassMark | 27,712+1662% | 1,573 |
Memory & Platform
The Ryzen 7 5800X uses the AM4 socket (PCIe 4.0), while the A6-6400B uses FM2 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Ryzen 7 5800X versus 1866 on the A6-6400B — the A6-6400B supports 199.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 7 5800X supports up to 128 GB of RAM compared to 32 — 120% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 24 (Ryzen 7 5800X) vs 16 (A6-6400B) — the Ryzen 7 5800X offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 7 5800X) and FM2 (A6-6400B).
| Feature | Ryzen 7 5800X | A6-6400B |
|---|---|---|
| Socket | AM4 | FM2 |
| PCIe Generation | PCIe 4.0+33% | PCIe 3.0 |
| Max RAM Speed | DDR4-3200 | 1866+46550% |
| Max RAM Capacity | 128 GB+419430300% | 32 |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 24+50% | 16 |
Advanced Features
Only the Ryzen 7 5800X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: AMD-V (Ryzen 7 5800X) vs true (A6-6400B). The A6-6400B includes integrated graphics (Radeon HD 8470D), while the Ryzen 7 5800X requires a dedicated GPU. Primary use case: Ryzen 7 5800X targets Desktop. Direct competitor: A6-6400B rivals Pentium G3220.
| Feature | Ryzen 7 5800X | A6-6400B |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | Radeon HD 8470D |
| Unlocked | Yes | No |
| AVX-512 | No | No |
| Virtualization | AMD-V | true |
| Target Use | Desktop | — |
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