A6-6400B vs Celeron 4305U
A6-6400B
Celeron 4305U
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. The A6-6400B is positioned at rank 655 and the Celeron 4305U is on rank 109, so the Celeron 4305U offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar A6-6400B
Performance Per Dollar Celeron 4305U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | A6-6400B | Celeron 4305U |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($107) |
| Longevity | 🛑 Legacy (Richland (2013−2014) / 32 nm) | ✨ Modern (Whiskey Lake-U (2018−2019) / 14 nm) |
💎 Value Proposition
| Insight | A6-6400B | Celeron 4305U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($107) |
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 A6-6400B and Celeron 4305U
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.
Celeron 4305U
The Celeron 4305U is manufactured by Intel. It was released in 16 April 2019 (6 years ago). It is based on the Whiskey Lake-U (2018−2019) architecture. It features 2 cores and 2 threads. Base frequency is 2.2 GHz, with boost up to 2.2 GHz. L3 cache: 2 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 15 Watt. Memory support: DDR4-2133, LPDDR3-1866. Passmark benchmark score: 1,562 points. Launch price was $107.
Processing Power
Both the A6-6400B and Celeron 4305U share an identical 2-core/2-thread configuration. Boost clocks reach 4.1 GHz on the A6-6400B versus 2.2 GHz on the Celeron 4305U — a 60.3% clock advantage for the A6-6400B (base: 3.9 GHz vs 2.2 GHz). The A6-6400B uses the Richland (2013−2014) architecture (32 nm), while the Celeron 4305U uses Whiskey Lake-U (2018−2019) (14 nm). In PassMark, the A6-6400B scores 1,573 against the Celeron 4305U's 1,562 — a 0.7% lead for the A6-6400B.
| Feature | A6-6400B | Celeron 4305U |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 4.1 GHz+86% | 2.2 GHz |
| Base Clock | 3.9 GHz+77% | 2.2 GHz |
| L3 Cache | — | 2 MB (total) |
| L2 Cache | 1 MB (total)+300% | 256 kB (per core) |
| Process | 32 nm | 14 nm-56% |
| Architecture | Richland (2013−2014) | Whiskey Lake-U (2018−2019) |
| PassMark | 1,573 | 1,562 |
Memory & Platform
The A6-6400B uses the FM2 socket (PCIe 3.0), while the Celeron 4305U uses FCBGA1528 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 1866 on the A6-6400B versus 2133 on the Celeron 4305U — the Celeron 4305U supports 13.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron 4305U supports up to 64 of RAM compared to 32 — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: FM2 (A6-6400B) and Whiskey Lake-U (Celeron 4305U).
| Feature | A6-6400B | Celeron 4305U |
|---|---|---|
| Socket | FM2 | FCBGA1528 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | 1866 | 2133+14% |
| Max RAM Capacity | 32 | 64+100% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 16 | 16 |
Advanced Features
Neither processor supports overclocking. Both support true virtualization. Both include integrated graphics — Radeon HD 8470D (A6-6400B) and Intel UHD Graphics 610 (Celeron 4305U) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron 4305U targets Budget. Direct competitor: A6-6400B rivals Pentium G3220; Celeron 4305U rivals Pentium Gold 5405U.
| Feature | A6-6400B | Celeron 4305U |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Radeon HD 8470D | Intel UHD Graphics 610 |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | true | true |
| Target Use | — | Budget |
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