CPU
GPU
Sempron 3100+
Atom N455
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 Sempron 3100+ is positioned at rank 1068 and the Atom N455 is on rank 633, so the Atom N455 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Sempron 3100+
Performance Per Dollar Atom N455
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Sempron 3100+ | Atom N455 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($15) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Palermo (2001−2005) / 130 nm) | 🛑 Legacy (Pinetrail (2009−2011) / 45 nm) |
💎 Value Proposition
| Insight | Sempron 3100+ | Atom N455 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($15) | ✅ 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 Sempron 3100+ and Atom N455
Sempron 3100+
The Sempron 3100+ is manufactured by AMD. It was released in Janeiro 2001 (24 years ago). It is based on the Palermo (2001−2005) architecture. It features 1 cores and 1 threads. Max frequency: 1.8 GHz. L3 cache: 0 kB. L2 cache: 256 kB. Built on 130 nm process technology. Socket: 754. Thermal design power (TDP): 62 Watt. Passmark benchmark score: 372 points. Launch price was $60.
Atom N455
The Atom N455 is manufactured by Intel. It was released in 1 June 2010 (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: 512K (per core). Built on 45 nm process technology. Socket: FCBGA559. Thermal design power (TDP): 6.5 Watt. Memory support: DDR3. Passmark benchmark score: 345 points. Launch price was $64.
Processing Power
The Sempron 3100+ packs 1 cores / 1 threads, matching the Atom N455's 1 cores. Boost clocks reach 1.8 GHz on the Sempron 3100+ versus 1.67 GHz on the Atom N455 — a 7.5% clock advantage for the Sempron 3100+. The Sempron 3100+ uses the Palermo (2001−2005) architecture (130 nm), while the Atom N455 uses Pinetrail (2009−2011) (45 nm). In PassMark, the Sempron 3100+ scores 372 against the Atom N455's 345 — a 7.5% lead for the Sempron 3100+. Both processors carry 0 kB of L3 cache.
| Feature | Sempron 3100+ | Atom N455 |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 2 |
| Boost Clock | 1.8 GHz+8% | 1.67 GHz |
| Base Clock | — | 1.66 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 256 kB | 512K (per core)+100% |
| Process | 130 nm | 45 nm-65% |
| Architecture | Palermo (2001−2005) | Pinetrail (2009−2011) |
| PassMark | 372+8% | 345 |
Memory & Platform
The Sempron 3100+ uses the 754 socket (PCIe 2.0), while the Atom N455 uses FCBGA559 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR 400 MHz on the Sempron 3100+ versus DDR3-667 on the Atom N455 — the Sempron 3100+ supports 197% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Sempron 3100+ supports up to 3 GB of RAM compared to 2 GB — 40% more capacity for professional workloads. Both feature 1-channel memory with ECC support. Both provide 0 PCIe lanes. Chipset compatibility: nForce3,VIA K8T800 (Sempron 3100+) and Intel NM10 (Atom N455).
| Feature | Sempron 3100+ | Atom N455 |
|---|---|---|
| Socket | 754 | FCBGA559 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | DDR 400 MHz+13233% | DDR3-667 |
| Max RAM Capacity | 3 GB+50% | 2 GB |
| RAM Channels | 1 | 1 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 0 |
Advanced Features
Virtualization: false (Sempron 3100+) / not specified (Atom N455). The Atom N455 includes integrated graphics (Intel GMA 3150), while the Sempron 3100+ requires a dedicated GPU. Primary use case: Sempron 3100+ targets Budget.
| Feature | Sempron 3100+ | Atom N455 |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | Intel GMA 3150 |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | false | — |
| Target Use | Budget | — |
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