Atom Z550 vs Athlon XP 2800+
Atom Z550
Athlon XP 2800+
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 Z550 is positioned at rank 592 and the Athlon XP 2800+ is on rank 1125, 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 Z550
Performance Per Dollar Athlon XP 2800+
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Atom Z550 | Athlon XP 2800+ |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($35) |
| Longevity | 🛑 Legacy (Silverthorne (2008−2010) / 45 nm) | 🛑 Legacy (Barton (2001−2004) / 130 nm) |
💎 Value Proposition
| Insight | Atom Z550 | Athlon XP 2800+ |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($35) |
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 Z550 and Athlon XP 2800+
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.
Athlon XP 2800+
The Athlon XP 2800+ is manufactured by AMD. It was released in 2009-01-01. It is based on the Barton (2001−2004) architecture. It features 1 cores and 1 threads. Max frequency: 2.25 GHz. L3 cache: 0 kB. L2 cache: 512K. Built on 130 nm process technology. Socket: A. Thermal design power (TDP): 74 Watt. Passmark benchmark score: 380 points. Launch price was $149.
Processing Power
The Atom Z550 packs 1 cores / 2 threads, matching the Athlon XP 2800+'s 1 cores. Boost clocks reach 2 GHz on the Atom Z550 versus 2.25 GHz on the Athlon XP 2800+ — a 11.8% clock advantage for the Athlon XP 2800+. The Atom Z550 uses the Silverthorne (2008−2010) architecture (45 nm), while the Athlon XP 2800+ uses Barton (2001−2004) (130 nm). In PassMark, the Atom Z550 scores 375 against the Athlon XP 2800+'s 380 — a 1.3% lead for the Athlon XP 2800+. Both processors carry 0 kB of L3 cache.
| Feature | Atom Z550 | Athlon XP 2800+ |
|---|---|---|
| Cores / Threads | 1 / 2 | 1 / 1 |
| Boost Clock | 2 GHz | 2.25 GHz+13% |
| Base Clock | 2 GHz | — |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 512 kB (per core) | 512K |
| Process | 45 nm-65% | 130 nm |
| Architecture | Silverthorne (2008−2010) | Barton (2001−2004) |
| PassMark | 375 | 380+1% |
| Geekbench 6 Single | — | 250 |
| Geekbench 6 Multi | — | 250 |
Memory & Platform
The Atom Z550 uses the PBGA441 socket (PCIe 2.0), while the Athlon XP 2800+ uses A (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2-533 on the Atom Z550 versus DDR-333 on the Athlon XP 2800+ — the Atom Z550 supports -202.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 2 GB of RAM. Both feature 1-channel memory with ECC support. Both provide 0 PCIe lanes. Chipset compatibility: Intel US15W (Atom Z550) and KT400,nForce2 Ultra 400 (Athlon XP 2800+).
| Feature | Atom Z550 | Athlon XP 2800+ |
|---|---|---|
| Socket | PBGA441 | A |
| PCIe Generation | PCIe 2.0+82% | PCIe 1.1 |
| Max RAM Speed | DDR2-533 | DDR-333 |
| Max RAM Capacity | 2 GB | 2 GB |
| RAM Channels | 1 | 1 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 0 |
Advanced Features
Virtualization: not specified (Atom Z550) / None (Athlon XP 2800+). Primary use case: Athlon XP 2800+ targets Legacy Desktop.
| Feature | Atom Z550 | Athlon XP 2800+ |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | — | Yes |
| AVX-512 | — | No |
| Virtualization | — | None |
| Target Use | — | Legacy Desktop |
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