Atom E3815 vs Atom Z550
Atom E3815
Atom Z550
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 E3815 is positioned at rank 1103 and the Atom Z550 is on rank 592, so the Atom Z550 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Atom E3815
Performance Per Dollar Atom Z550
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Atom E3815 | Atom Z550 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | 🛑 Legacy (Bay Trail-I (2013) / 22 nm) | 🛑 Legacy (Silverthorne (2008−2010) / 45 nm) |
💎 Value Proposition
| Insight | Atom E3815 | Atom Z550 |
|---|---|---|
| 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 E3815 and Atom Z550
Atom E3815
The Atom E3815 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 1 cores and 1 threads. Max frequency: 1.47 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 22 nm process technology. Socket: FCBGA1170. Thermal design power (TDP): 512 kB. Memory support: DDR3. Passmark benchmark score: 365 points. Launch price was $134.
Atom Z550
The Atom Z550 is manufactured by Intel. It was released in 8 April 2009 (16 years ago). It is based on the Silverthorne (2008−2010) architecture. It features 1 cores and 2 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: PBGA441. Thermal design power (TDP): 2.4 Watt. Memory support: unknown. Passmark benchmark score: 375 points. Launch price was $69.
Processing Power
The Atom E3815 packs 1 cores / 1 threads, matching the Atom Z550's 1 cores. Boost clocks reach 1.47 GHz on the Atom E3815 versus 2 GHz on the Atom Z550 — a 30.5% clock advantage for the Atom Z550. The Atom E3815 uses the Bay Trail-I (2013) architecture (22 nm), while the Atom Z550 uses Silverthorne (2008−2010) (45 nm). In PassMark, the Atom E3815 scores 365 against the Atom Z550's 375 — a 2.7% lead for the Atom Z550. Both processors carry 0 kB of L3 cache.
| Feature | Atom E3815 | Atom Z550 |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 2 |
| Boost Clock | 1.47 GHz | 2 GHz+36% |
| Base Clock | — | 2 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 512 kB (per core) | 512 kB (per core) |
| Process | 22 nm-51% | 45 nm |
| Architecture | Bay Trail-I (2013) | Silverthorne (2008−2010) |
| PassMark | 365 | 375+3% |
Memory & Platform
The Atom E3815 uses the FCBGA1170 socket (PCIe 2.0), while the Atom Z550 uses PBGA441 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3L-1066 on the Atom E3815 versus DDR2-533 on the Atom Z550 — the Atom E3815 supports 40% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Atom E3815 supports up to 8 GB of RAM compared to 2 GB — 120% more capacity for professional workloads. Both feature 1-channel memory with ECC support. PCIe lanes: 4 (Atom E3815) vs 0 (Atom Z550) — the Atom E3815 offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel FCBGA1170 (Atom E3815) and Intel US15W (Atom Z550).
| Feature | Atom E3815 | Atom Z550 |
|---|---|---|
| Socket | FCBGA1170 | PBGA441 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | DDR3L-1066+50% | DDR2-533 |
| Max RAM Capacity | 8 GB+300% | 2 GB |
| RAM Channels | 1 | 1 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 4 | 0 |
Advanced Features
The Atom E3815 includes integrated graphics (Intel HD Graphics (Bay Trail)), while the Atom Z550 requires a dedicated GPU.
| Feature | Atom E3815 | Atom Z550 |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | Intel HD Graphics (Bay Trail) | — |
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