CPU
GPU
Athlon XP 2800+
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 Athlon XP 2800+ is positioned at rank 1125 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 Athlon XP 2800+
Performance Per Dollar Atom Z550
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon XP 2800+ | Atom Z550 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($35) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Barton (2001−2004) / 130 nm) | 🛑 Legacy (Silverthorne (2008−2010) / 45 nm) |
💎 Value Proposition
| Insight | Athlon XP 2800+ | Atom Z550 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($35) | ✅ 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 Athlon XP 2800+ and Atom Z550
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.
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 Athlon XP 2800+ packs 1 cores / 1 threads, matching the Atom Z550's 1 cores. Boost clocks reach 2.25 GHz on the Athlon XP 2800+ versus 2 GHz on the Atom Z550 — a 11.8% clock advantage for the Athlon XP 2800+. The Athlon XP 2800+ uses the Barton (2001−2004) architecture (130 nm), while the Atom Z550 uses Silverthorne (2008−2010) (45 nm). In PassMark, the Athlon XP 2800+ scores 380 against the Atom Z550's 375 — a 1.3% lead for the Athlon XP 2800+. Both processors carry 0 kB of L3 cache.
| Feature | Athlon XP 2800+ | Atom Z550 |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 2 |
| Boost Clock | 2.25 GHz+13% | 2 GHz |
| Base Clock | — | 2 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 512K | 512 kB (per core) |
| Process | 130 nm | 45 nm-65% |
| Architecture | Barton (2001−2004) | Silverthorne (2008−2010) |
| PassMark | 380+1% | 375 |
| Geekbench 6 Single | 250 | — |
| Geekbench 6 Multi | 250 | — |
Memory & Platform
The Athlon XP 2800+ uses the A socket (PCIe 1.1), while the Atom Z550 uses PBGA441 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR-333 on the Athlon XP 2800+ versus DDR2-533 on the Atom Z550 — 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: KT400,nForce2 Ultra 400 (Athlon XP 2800+) and Intel US15W (Atom Z550).
| Feature | Athlon XP 2800+ | Atom Z550 |
|---|---|---|
| Socket | A | PBGA441 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | DDR-333 | DDR2-533 |
| Max RAM Capacity | 2 GB | 2 GB |
| RAM Channels | 1 | 1 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 0 |
Advanced Features
Virtualization: None (Athlon XP 2800+) / not specified (Atom Z550). Primary use case: Athlon XP 2800+ targets Legacy Desktop.
| Feature | Athlon XP 2800+ | Atom Z550 |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | Yes | — |
| AVX-512 | No | — |
| Virtualization | None | — |
| Target Use | Legacy Desktop | — |
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