Atom N450 vs Mobile Sempron SI-42
Atom N450
Mobile Sempron SI-42
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 Atom N450 is positioned at rank 660 and the Mobile Sempron SI-42 is on rank 1175, so the Atom N450 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Atom N450
Performance Per Dollar Mobile Sempron SI-42
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Atom N450 | Mobile Sempron SI-42 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | 🛑 Legacy (Pinetrail (2009−2011) / 45 nm) | 🛑 Legacy (Sable (2008−2009) / 65 nm) |
💎 Value Proposition
| Insight | Atom N450 | Mobile Sempron SI-42 |
|---|---|---|
| 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 Atom N450 and Mobile Sempron SI-42
Atom N450
The Atom N450 is manufactured by Intel. It was released in 21 December 2009 (15 years ago). It is based on the Pinetrail (2009−2011) architecture. It features 1 cores and 2 threads. Base frequency is 1.66 GHz, with boost up to 1.67 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: FCBGA559. Thermal design power (TDP): 5.5 Watt. Memory support: DDR2. Passmark benchmark score: 325 points. Launch price was $64.
Mobile Sempron SI-42
The Mobile Sempron SI-42 is manufactured by AMD. It was released in 1 September 2009 (16 years ago). It is based on the Sable (2008−2009) architecture. It features 1 cores and 1 threads. Max frequency: 2.1 GHz. L2 cache: 512 kB. Built on 65 nm process technology. Socket: S1g2. Thermal design power (TDP): 512 kB. Passmark benchmark score: 332 points. Launch price was $69.
Processing Power
The Atom N450 packs 1 cores / 2 threads, matching the Mobile Sempron SI-42's 1 cores. Boost clocks reach 1.67 GHz on the Atom N450 versus 2.1 GHz on the Mobile Sempron SI-42 — a 22.8% clock advantage for the Mobile Sempron SI-42. The Atom N450 uses the Pinetrail (2009−2011) architecture (45 nm), while the Mobile Sempron SI-42 uses Sable (2008−2009) (65 nm). In PassMark, the Atom N450 scores 325 against the Mobile Sempron SI-42's 332 — a 2.1% lead for the Mobile Sempron SI-42.
| Feature | Atom N450 | Mobile Sempron SI-42 |
|---|---|---|
| Cores / Threads | 1 / 2 | 1 / 1 |
| Boost Clock | 1.67 GHz | 2.1 GHz+26% |
| Base Clock | 1.66 GHz | — |
| L3 Cache | 0 kB | — |
| L2 Cache | 512 kB (per core) | 512 kB |
| Process | 45 nm-31% | 65 nm |
| Architecture | Pinetrail (2009−2011) | Sable (2008−2009) |
| PassMark | 325 | 332+2% |
Memory & Platform
The Atom N450 uses the FCBGA559 socket (PCIe 2.0), while the Mobile Sempron SI-42 uses S1g2 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Atom N450 | Mobile Sempron SI-42 |
|---|---|---|
| Socket | FCBGA559 | S1g2 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | DDR2-667 | — |
| Max RAM Capacity | 2 GB | — |
| RAM Channels | 1 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 0 | — |
Advanced Features
The Atom N450 includes integrated graphics (Intel GMA 3150), while the Mobile Sempron SI-42 requires a dedicated GPU.
| Feature | Atom N450 | Mobile Sempron SI-42 |
|---|---|---|
| Integrated GPU | Yes | — |
| IGPU Model | Intel GMA 3150 | — |
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