CPU
GPU
Athlon XP 1900+
Atom Z520
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 1900+ is positioned at rank 1132 and the Atom Z520 is on rank 523, so the Atom Z520 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 1900+
Performance Per Dollar Atom Z520
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon XP 1900+ | Atom Z520 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($20) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Thoroughbred (2001−2002) / 180 nm) | 🛑 Legacy (Silverthorne (2008−2010) / 45 nm) |
💎 Value Proposition
| Insight | Athlon XP 1900+ | Atom Z520 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($20) | ✅ 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 1900+ and Atom Z520
Athlon XP 1900+
The Athlon XP 1900+ is manufactured by AMD. It was released in 2009-01-01. It is based on the Thoroughbred (2001−2002) architecture. It features 1 cores and 1 threads. Max frequency: 1.6 GHz. L3 cache: 0 kB. L2 cache: 256 kB. Built on 180 nm process technology. Socket: A. Thermal design power (TDP): 68 Watt. Passmark benchmark score: 238 points. Launch price was $149.
Atom Z520
The Atom Z520 is manufactured by Intel. It was released in 2 April 2008 (17 years ago). It is based on the Silverthorne (2008−2010) architecture. It features 1 cores and 2 threads. Base frequency is 1.33 GHz, with boost up to 0.03 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 45 nm process technology. Socket: PBGA441. Thermal design power (TDP): 2 Watt. Passmark benchmark score: 215 points. Launch price was $65.
Processing Power
The Athlon XP 1900+ packs 1 cores / 1 threads, matching the Atom Z520's 1 cores. Boost clocks reach 1.6 GHz on the Athlon XP 1900+ versus 0.03 GHz on the Atom Z520 — a 192.6% clock advantage for the Athlon XP 1900+. The Athlon XP 1900+ uses the Thoroughbred (2001−2002) architecture (180 nm), while the Atom Z520 uses Silverthorne (2008−2010) (45 nm). In PassMark, the Athlon XP 1900+ scores 238 against the Atom Z520's 215 — a 10.2% lead for the Athlon XP 1900+. Both processors carry 0 kB of L3 cache.
| Feature | Athlon XP 1900+ | Atom Z520 |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 2 |
| Boost Clock | 1.6 GHz+5233% | 0.03 GHz |
| Base Clock | — | 1.33 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 256 kB | 512 kB+100% |
| Process | 180 nm | 45 nm-75% |
| Architecture | Thoroughbred (2001−2002) | Silverthorne (2008−2010) |
| PassMark | 238+11% | 215 |
Memory & Platform
The Athlon XP 1900+ uses the A socket (PCIe 1.1), while the Atom Z520 uses PBGA441 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR-266 on the Athlon XP 1900+ versus DDR2-533 on the Atom Z520 — the Atom Z520 supports -203% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Athlon XP 1900+ supports up to 4 GB of RAM compared to 2 GB — 66.7% more capacity for professional workloads. Both feature 1-channel memory with ECC support. Both provide 0 PCIe lanes. Chipset compatibility: AMD Socket A (Athlon XP 1900+) and Intel US15W (Atom Z520).
| Feature | Athlon XP 1900+ | Atom Z520 |
|---|---|---|
| Socket | A | PBGA441 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | DDR-266 | DDR2-533 |
| Max RAM Capacity | 4 GB+100% | 2 GB |
| RAM Channels | 1 | 1 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 0 | 0 |
Advanced Features
Virtualization: not specified (Athlon XP 1900+) / VT-x (Atom Z520). Primary use case: Atom Z520 targets Mobile.
| Feature | Athlon XP 1900+ | Atom Z520 |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | VT-x |
| Target Use | — | Mobile |
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