
Pentium III 1200 vs Atom Z500

Pentium III 1200

Atom Z500
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 Pentium III 1200 is positioned at rank 1126 and the Atom Z500 is on rank 946, so the Atom Z500 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Pentium III 1200
Performance Per Dollar Atom Z500
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Pentium III 1200 | Atom Z500 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($10) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Tualatin (2000−2002) / 130 nm) | 🛑 Legacy (Silverthorne (2008−2010) / 45 nm) |
💎 Value Proposition
| Insight | Pentium III 1200 | Atom Z500 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($10) | ✅ 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 Pentium III 1200 and Atom Z500

Pentium III 1200
The Pentium III 1200 is manufactured by Intel. It was released in 2007-01-01. It is based on the Tualatin (2000−2002) architecture. It features 1 cores and 1 threads. Max frequency: 1.2 GHz. L3 cache: 0 kB. L2 cache: 256 kB. Built on 130 nm process technology. Socket: PGA370. Thermal design power (TDP): 30 Watt. Passmark benchmark score: 195 points. Launch price was $69.

Atom Z500
The Atom Z500 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 1 threads. Max frequency: 0.8 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 45 nm process technology. Socket: PBGA441. Thermal design power (TDP): 0.65 Watt. Passmark benchmark score: 165 points. Launch price was $45.
Processing Power
Both the Pentium III 1200 and Atom Z500 share an identical 1-core/1-thread configuration. Boost clocks reach 1.2 GHz on the Pentium III 1200 versus 0.8 GHz on the Atom Z500 — a 40% clock advantage for the Pentium III 1200. The Pentium III 1200 uses the Tualatin (2000−2002) architecture (130 nm), while the Atom Z500 uses Silverthorne (2008−2010) (45 nm). In PassMark, the Pentium III 1200 scores 195 against the Atom Z500's 165 — a 16.7% lead for the Pentium III 1200. Both processors carry 0 kB of L3 cache.
| Feature | Pentium III 1200 | Atom Z500 |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 1 |
| Boost Clock | 1.2 GHz+50% | 0.8 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 256 kB | 512 kB+100% |
| Process | 130 nm | 45 nm-65% |
| Architecture | Tualatin (2000−2002) | Silverthorne (2008−2010) |
| PassMark | 195+18% | 165 |
Memory & Platform
The Pentium III 1200 uses the PGA370 socket (PCIe 1.1), while the Atom Z500 uses PBGA441 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches SDR-133 on the Pentium III 1200 versus DDR2-533 on the Atom Z500 — the Atom Z500 supports -206.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Pentium III 1200 supports up to 512 MB of RAM compared to 2 GB — 198.4% more capacity for professional workloads. Both feature 1-channel memory with ECC support. Both provide 0 PCIe lanes.
| Feature | Pentium III 1200 | Atom Z500 |
|---|---|---|
| Socket | PGA370 | PBGA441 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | SDR-133 | DDR2-533 |
| Max RAM Capacity | 512 MB | 2 GB+300% |
| RAM Channels | 1 | 1 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 0 |
Advanced Features
Virtualization: None (Pentium III 1200) / not specified (Atom Z500). Primary use case: Pentium III 1200 targets Legacy.
| Feature | Pentium III 1200 | Atom Z500 |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | None | — |
| Target Use | Legacy | — |
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