Celeron 3855U vs A6-3400M
Celeron 3855U
A6-3400M
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 Celeron 3855U is positioned at rank 193 and the A6-3400M is on rank 869, so the Celeron 3855U offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Celeron 3855U
Performance Per Dollar A6-3400M
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Celeron 3855U | A6-3400M |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | 🛑 Legacy (Skylake (2015−2016) / 14 nm) | 🛑 Legacy (Llano (2011−2012) / 32 nm) |
💎 Value Proposition
| Insight | Celeron 3855U | A6-3400M |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | Equivalent pricing | Equivalent pricing |
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 Celeron 3855U and A6-3400M
Celeron 3855U
The Celeron 3855U is manufactured by Intel. It was released in 15 August 2015 (10 years ago). It is based on the Skylake (2015−2016) architecture. It features 2 cores and 2 threads. Base frequency is 1.6 GHz, with boost up to 1.6 GHz. L3 cache: 2 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR4-1866/2133, LPDDR3-1600/1866, DDR3L-1333/1600. Passmark benchmark score: 1,215 points. Launch price was $107.
A6-3400M
The A6-3400M is manufactured by AMD. It was released in 2014-01-01. It is based on the Llano (2011−2012) architecture. It features 4 cores and 4 threads. Base frequency is 1.4 GHz, with boost up to 2.3 GHz. L3 cache: 0 kB. L2 cache: 1 MB (per core). Built on 32 nm process technology. Socket: FS1. Thermal design power (TDP): 35 Watt. Memory support: DDR3. Passmark benchmark score: 1,223 points. Launch price was $70.
Processing Power
The Celeron 3855U packs 2 cores / 2 threads, while the A6-3400M offers 4 cores / 4 threads — the A6-3400M has 2 more cores. Boost clocks reach 1.6 GHz on the Celeron 3855U versus 2.3 GHz on the A6-3400M — a 35.9% clock advantage for the A6-3400M (base: 1.6 GHz vs 1.4 GHz). The Celeron 3855U uses the Skylake (2015−2016) architecture (14 nm), while the A6-3400M uses Llano (2011−2012) (32 nm). In PassMark, the Celeron 3855U scores 1,215 against the A6-3400M's 1,223 — a 0.7% lead for the A6-3400M. Geekbench 6 single-core — the metric most relevant to gaming — records 361 vs 218, a 49.4% lead for the Celeron 3855U that directly translates to higher frame rates. L3 cache: 2 MB on the Celeron 3855U vs 0 kB on the A6-3400M.
| Feature | Celeron 3855U | A6-3400M |
|---|---|---|
| Cores / Threads | 2 / 2 | 4 / 4+100% |
| Boost Clock | 1.6 GHz | 2.3 GHz+44% |
| Base Clock | 1.6 GHz+14% | 1.4 GHz |
| L3 Cache | 2 MB | 0 kB |
| L2 Cache | 512 kB | 1 MB (per core)+100% |
| Process | 14 nm-56% | 32 nm |
| Architecture | Skylake (2015−2016) | Llano (2011−2012) |
| PassMark | 1,215 | 1,223 |
| Geekbench 6 Single | 361+66% | 218 |
| Geekbench 6 Multi | 632 | — |
Memory & Platform
The Celeron 3855U uses the BGA1356 socket (PCIe 3.0), while the A6-3400M uses FS1 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4 2133 MHz on the Celeron 3855U versus DDR3-1333 on the A6-3400M — the Celeron 3855U supports 200% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron 3855U supports up to 32 GB of RAM compared to 8 GB — 120% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 10 (Celeron 3855U) vs 16 (A6-3400M) — the A6-3400M offers 6 more lanes for additional GPUs or NVMe drives.
| Feature | Celeron 3855U | A6-3400M |
|---|---|---|
| Socket | BGA1356 | FS1 |
| PCIe Generation | PCIe 3.0+50% | PCIe 2.0 |
| Max RAM Speed | DDR4 2133 MHz+33% | DDR3-1333 |
| Max RAM Capacity | 32 GB+300% | 8 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 10 | 16+60% |
Advanced Features
Neither processor supports overclocking. Virtualization support: true (Celeron 3855U) vs AMD-V (A6-3400M). Both include integrated graphics — Intel HD Graphics 510 (Celeron 3855U) and Radeon HD 6520G (A6-3400M) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron 3855U targets Budget, A6-3400M targets Budget Laptop. Direct competitor: Celeron 3855U rivals Pentium 3825U; A6-3400M rivals Core i3-2310M.
| Feature | Celeron 3855U | A6-3400M |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Intel HD Graphics 510 | Radeon HD 6520G |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | true | AMD-V |
| Target Use | Budget | Budget Laptop |
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