A4-3420 vs Pentium 3556U
A4-3420
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 A4-3420 is positioned at rank 875 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 A4-3420
Performance Per Dollar Pentium 3556U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | A4-3420 | Pentium 3556U |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($30) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Llano (2011−2012) / 32 nm) | 🛑 Legacy (Haswell (2013−2015) / 22 nm) |
💎 Value Proposition
| Insight | A4-3420 | Pentium 3556U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($30) | ✅ More affordable ($0) |
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 A4-3420 and Pentium 3556U
A4-3420
The A4-3420 is manufactured by AMD. It was released in 2014-01-01. It is based on the Llano (2011−2012) architecture. It features 2 cores and 2 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 32 nm process technology. Socket: FM1. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 1,067 points. Launch price was $50.
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
Both the A4-3420 and Pentium 3556U share an identical 2-core/2-thread configuration. Boost clocks reach 2.8 GHz on the A4-3420 versus 1.7 GHz on the Pentium 3556U — a 48.9% clock advantage for the A4-3420 (base: 2.8 GHz vs 1.7 GHz). The A4-3420 uses the Llano (2011−2012) architecture (32 nm), while the Pentium 3556U uses Haswell (2013−2015) (22 nm). In PassMark, the A4-3420 scores 1,067 against the Pentium 3556U's 1,072 — a 0.5% lead for the Pentium 3556U. L3 cache: 0 kB on the A4-3420 vs 2 MB (total) on the Pentium 3556U.
| Feature | A4-3420 | Pentium 3556U |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 2.8 GHz+65% | 1.7 GHz |
| Base Clock | 2.8 GHz+65% | 1.7 GHz |
| L3 Cache | 0 kB | 2 MB (total) |
| L2 Cache | 512 kB (per core)+100% | 256K (per core) |
| Process | 32 nm | 22 nm-31% |
| Architecture | Llano (2011−2012) | Haswell (2013−2015) |
| PassMark | 1,067 | 1,072 |
| Geekbench 6 Single | 300 | — |
| Geekbench 6 Multi | 500 | — |
Memory & Platform
The A4-3420 uses the FM1 socket (PCIe 2.0), while the Pentium 3556U uses FCBGA1168 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | A4-3420 | Pentium 3556U |
|---|---|---|
| Socket | FM1 | FCBGA1168 |
| PCIe Generation | PCIe 2.0 | PCIe 3.0+50% |
| Max RAM Speed | DDR3-1600 | — |
| Max RAM Capacity | 32 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 16 | — |
Advanced Features
Virtualization: AMD-V (A4-3420) / not specified (Pentium 3556U). The A4-3420 includes integrated graphics (Radeon HD 6410D), while the Pentium 3556U requires a dedicated GPU. Primary use case: A4-3420 targets Entry Desktop. Direct competitor: A4-3420 rivals Pentium G630.
| Feature | A4-3420 | Pentium 3556U |
|---|---|---|
| Integrated GPU | Yes | — |
| IGPU Model | Radeon HD 6410D | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | AMD-V | — |
| Target Use | Entry Desktop | — |
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