CPU
GPU
A4 Micro-6400T
Atom E3845
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 A4 Micro-6400T is positioned at rank 843 and the Atom E3845 is on rank 764, so the Atom E3845 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar A4 Micro-6400T
Performance Per Dollar Atom E3845
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | A4 Micro-6400T | Atom E3845 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | 🛑 Legacy (Mullins (2014) / 28 nm) | 🛑 Legacy (Bay Trail-I (2013) / 22 nm) |
💎 Value Proposition
| Insight | A4 Micro-6400T | Atom E3845 |
|---|---|---|
| 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 A4 Micro-6400T and Atom E3845
A4 Micro-6400T
The A4 Micro-6400T is manufactured by AMD. It was released in 29 April 2014 (11 years ago). It is based on the Mullins (2014) architecture. It features 4 cores and 4 threads. Base frequency is 1 GHz, with boost up to 1.6 GHz. L2 cache: 2048 kB. Built on 28 nm process technology. Socket: FT3. Thermal design power (TDP): 5 Watt. Memory support: DDR3-1333. Passmark benchmark score: 1,082 points. Launch price was $69.
Atom E3845
The Atom E3845 is manufactured by Intel. It was released in 8 October 2013 (12 years ago). It is based on the Bay Trail-I (2013) architecture. It features 4 cores and 4 threads. Max frequency: 1.91 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 22 nm process technology. Socket: FCBGA1170. Thermal design power (TDP): 10 Watt. Memory support: DDR3. Passmark benchmark score: 1,071 points. Launch price was $69.
Processing Power
Both the A4 Micro-6400T and Atom E3845 share an identical 4-core/4-thread configuration. Boost clocks reach 1.6 GHz on the A4 Micro-6400T versus 1.91 GHz on the Atom E3845 — a 17.7% clock advantage for the Atom E3845. The A4 Micro-6400T uses the Mullins (2014) architecture (28 nm), while the Atom E3845 uses Bay Trail-I (2013) (22 nm). In PassMark, the A4 Micro-6400T scores 1,082 against the Atom E3845's 1,071 — a 1% lead for the A4 Micro-6400T.
| Feature | A4 Micro-6400T | Atom E3845 |
|---|---|---|
| Cores / Threads | 4 / 4 | 4 / 4 |
| Boost Clock | 1.6 GHz | 1.91 GHz+19% |
| Base Clock | 1 GHz | — |
| L3 Cache | — | 0 kB |
| L2 Cache | 2048 kB+300% | 512 kB (per core) |
| Process | 28 nm | 22 nm-21% |
| Architecture | Mullins (2014) | Bay Trail-I (2013) |
| PassMark | 1,082+1% | 1,071 |
| Geekbench 6 Single | 180 | — |
Memory & Platform
The A4 Micro-6400T uses the FT3 socket (PCIe 3.0), while the Atom E3845 uses FCBGA1170 (PCIe 2.0) — making them incompatible on the same motherboard. Both support up to DDR3L-1333 memory speed. Both support up to 8 GB of RAM. Memory channels: 1 (A4 Micro-6400T) vs 2 (Atom E3845). PCIe lanes: 8 (A4 Micro-6400T) vs 4 (Atom E3845) — the A4 Micro-6400T offers 4 more lanes for additional GPUs or NVMe drives.
| Feature | A4 Micro-6400T | Atom E3845 |
|---|---|---|
| Socket | FT3 | FCBGA1170 |
| PCIe Generation | PCIe 3.0+50% | PCIe 2.0 |
| Max RAM Speed | DDR3L-1333 | DDR3L-1333 |
| Max RAM Capacity | 8 GB | 8 GB |
| RAM Channels | 1 | 2+100% |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 8+100% | 4 |
Advanced Features
Virtualization: AMD-V (A4 Micro-6400T) / not specified (Atom E3845). Both include integrated graphics — Radeon R3 (A4 Micro-6400T) and Intel HD Graphics (Bay Trail) (Atom E3845) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: A4 Micro-6400T targets Tablet. Direct competitor: A4 Micro-6400T rivals Atom Z3770.
| Feature | A4 Micro-6400T | Atom E3845 |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Radeon R3 | Intel HD Graphics (Bay Trail) |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | AMD-V | — |
| Target Use | Tablet | — |
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