AMD A6-6400B
AMD A6-6400B: A Budget Processor for Basic Tasks in 2025
Overview of Architecture, Compatibility, and Use Cases
1. Key Specifications: Architecture and Performance
Richland Architecture and 32nm Manufacturing Process
The AMD A6-6400B, released in 2013, belongs to the Accelerated Processing Units (APU) lineup of the Richland architecture. This hybrid solution combines two CPU cores with a clock speed of 3.9–4.1 GHz (Turbo Core) and an integrated graphics unit, the Radeon HD 8470D. The 32nm manufacturing process is considered outdated by 2025 standards — for comparison, modern AMD and Intel processors use 5–7nm technology. However, at the time, it allowed for a balance between cost and energy efficiency.
Key Features:
- Integrated Graphics — Radeon HD 8470D with 192 shader processors and a clock speed of 800 MHz.
- Turbo Core Technology — automatic overclocking up to 4.1 GHz under load.
- Support for DirectX 11 — relevant for older games and basic multimedia tasks.
Performance:
- In Cinebench R20 tests (2025), the A6-6400B scores around 300–350 points (for comparison: Ryzen 3 3200G scores approximately 2000 points).
- In games like CS:GO or Dota 2 at low settings, it can achieve FPS of 25–35, but modern titles (e.g., Cyberpunk 2077) won’t run.
2. Compatible Motherboards
FM2 Socket and Chipsets
The processor uses the FM2 socket, which limits the choice of motherboards to models produced between 2012 and 2014. Compatible chipsets include:
- A55, A58, A68H, A78, A85X — support PCIe 2.0, SATA III, and USB 3.0 (only A68H and above).
Selection Considerations in 2025:
- New FM2 motherboards are virtually nonexistent. Prices for remaining stock range from $50 to $80 (for example, ASUS A68HM-K).
- Be sure to check for the presence of ports:
- HDMI/DVI/VGA — for connecting monitors via integrated graphics.
- USB 3.0 — useful for external storage.
Important! Motherboards with A55/A58 chipsets do not support overclocking the processor.
3. Supported Memory Types
Only DDR3
The A6-6400B works with DDR3-1866 MHz memory in dual-channel mode. Modern DDR4 and DDR5 standards are not supported.
Recommendations:
- Install two DDR3 modules (e.g., 2x4 GB) to activate dual-channel mode — this will boost graphics performance by 15–20%.
- The maximum capacity depends on the motherboard — typically up to 32–64 GB, but 8–16 GB is sufficient for this processor.
4. PSU Recommendations
Minimum 300 Watts
With a TDP of 65 watts and no discrete graphics card, a PSU rated at 300–400 watts is adequate (e.g., be quiet! System Power 10 400W — $45).
Tips:
- If planning to install a discrete graphics card (e.g., GTX 1650), choose a PSU rated at 450–500 watts.
- Avoid cheap noname power supplies — unstable power can damage older components.
5. Pros and Cons of AMD A6-6400B
Pros:
- Low Price — a new processor costs $30–40 (from remaining stock).
- Energy Efficiency — suitable for compact PCs and office builds.
- Integrated Graphics — does not require a separate graphics card.
Cons:
- Weak Performance — struggles with multitasking and modern applications.
- Outdated Platform — lacks support for NVMe, USB 3.1, and Wi-Fi 6.
- Limited Upgradeability — no powerful processors available for FM2 socket.
6. Use Cases
Who is the A6-6400B Suitable for in 2025?
1. Office Tasks — working with documents, web browsing, video calls.
2. Multimedia — watching FullHD videos, streaming via YouTube.
3. Retro Gaming — running games from the 2000s to 2010s (e.g., Half-Life 2, World of Warcraft Classic).
Real Experience:
A user on Reddit built a PC with the A6-6400B for their parents — “Works great with Windows 10, but starts to lag with 10 tabs in Chrome.”
7. Comparison with Competitors
Intel Celeron G1820 vs. AMD A6-6400B
- CPU Performance: The Celeron G1820 (2 cores, 2.7 GHz) lags in multicore tasks due to the lack of Turbo Core.
- Graphics: The HD 8470D (AMD) outperforms Intel HD Graphics (by 30–40% in 3DMark tests).
- Price: Both processors cost $30–40, but AMD offers better value due to its integrated graphics.
Conclusion: The A6-6400B is better suited for systems without a discrete graphics card.
8. Practical Assembly Tips
1. RAM Selection: Kingston HyperX Fury DDR3-1866 (2x4 GB) — $25–30.
2. Storage: SSD Kingston A400 240 GB — $30 (HDD will cause "lag").
3. Cooling: The stock cooler is sufficient, but for quieter operation, consider the Arctic Alpine 23 — $15.
4. Case: Mini-ITX (e.g., Cooler Master Elite 110) for a compact build.
Important! Update the motherboard BIOS to the latest version.
9. Final Conclusion: Who is the A6-6400B Suitable For?
This processor is an option for:
- Budget Builds — if you need to stay within $150–200.
- Upgrading Old PCs — replacing outdated Athlon II or Phenom processors.
- Special Tasks — media centers, cafe terminals, test benches.
Why You Shouldn't Get It?
If you plan to work with graphics, edit videos, or play new releases — even a budget Ryzen 3 5300G (6nm, 4 cores, $120) will be four times more powerful.
Conclusion
The AMD A6-6400B in 2025 is a niche solution. It is technically outdated but remains relevant for non-demanding users who value minimalism and savings. It's not a processor for the future, but it may breathe new life into older hardware.