CPU
GPU
A4 Micro-6400T
Pentium 3556U
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 Pentium 3556U is on rank 253, so the Pentium 3556U 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 Pentium 3556U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | A4 Micro-6400T | Pentium 3556U |
|---|---|---|
| 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 (Haswell (2013−2015) / 22 nm) |
💎 Value Proposition
| Insight | A4 Micro-6400T | Pentium 3556U |
|---|---|---|
| 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 Pentium 3556U
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.
Pentium 3556U
The Pentium 3556U is manufactured by Intel. It was released in 2007-01-01. It is based on the Haswell (2013−2015) architecture. It features 2 cores and 2 threads. Base frequency is 1.7 GHz, with boost up to 1.7 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 15 Watt. Memory support: DDR3. Passmark benchmark score: 1,072 points. Launch price was $69.
Processing Power
The A4 Micro-6400T packs 4 cores / 4 threads, while the Pentium 3556U offers 2 cores / 2 threads — the A4 Micro-6400T has 2 more cores. Boost clocks reach 1.6 GHz on the A4 Micro-6400T versus 1.7 GHz on the Pentium 3556U — a 6.1% clock advantage for the Pentium 3556U (base: 1 GHz vs 1.7 GHz). The A4 Micro-6400T uses the Mullins (2014) architecture (28 nm), while the Pentium 3556U uses Haswell (2013−2015) (22 nm). In PassMark, the A4 Micro-6400T scores 1,082 against the Pentium 3556U's 1,072 — a 0.9% lead for the A4 Micro-6400T.
| Feature | A4 Micro-6400T | Pentium 3556U |
|---|---|---|
| Cores / Threads | 4 / 4+100% | 2 / 2 |
| Boost Clock | 1.6 GHz | 1.7 GHz+6% |
| Base Clock | 1 GHz | 1.7 GHz+70% |
| L3 Cache | — | 2 MB (total) |
| L2 Cache | 2048 kB+700% | 256K (per core) |
| Process | 28 nm | 22 nm-21% |
| Architecture | Mullins (2014) | Haswell (2013−2015) |
| PassMark | 1,082 | 1,072 |
| Geekbench 6 Single | 180 | — |
Memory & Platform
The A4 Micro-6400T uses the FT3 socket (PCIe 3.0), while the Pentium 3556U uses FCBGA1168 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | A4 Micro-6400T | Pentium 3556U |
|---|---|---|
| Socket | FT3 | FCBGA1168 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | DDR3L-1333 | — |
| Max RAM Capacity | 8 GB | — |
| RAM Channels | 1 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 8 | — |
Advanced Features
Virtualization: AMD-V (A4 Micro-6400T) / not specified (Pentium 3556U). The A4 Micro-6400T includes integrated graphics (Radeon R3), while the Pentium 3556U requires a dedicated GPU. Primary use case: A4 Micro-6400T targets Tablet. Direct competitor: A4 Micro-6400T rivals Atom Z3770.
| Feature | A4 Micro-6400T | Pentium 3556U |
|---|---|---|
| Integrated GPU | Yes | — |
| IGPU Model | Radeon R3 | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | AMD-V | — |
| Target Use | Tablet | — |
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