
Pentium III 1133 vs Atom Z500

Pentium III 1133

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 1133 is positioned at rank 1142 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 1133
Performance Per Dollar Atom Z500
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Pentium III 1133 | Atom Z500 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($30) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Tualatin (2000−2002) / 180 nm) | 🛑 Legacy (Silverthorne (2008−2010) / 45 nm) |
💎 Value Proposition
| Insight | Pentium III 1133 | Atom Z500 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($30) | ✅ 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 1133 and Atom Z500

Pentium III 1133
The Pentium III 1133 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: 1.13 GHz. L3 cache: 0 kB. L2 cache: 256 kB. Built on 180 nm process technology. Socket: PGA370. Thermal design power (TDP): 29 Watt. Passmark benchmark score: 180 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 1133 and Atom Z500 share an identical 1-core/1-thread configuration. Boost clocks reach 1.13 GHz on the Pentium III 1133 versus 0.8 GHz on the Atom Z500 — a 34.2% clock advantage for the Pentium III 1133. The Pentium III 1133 uses the Tualatin (2000−2002) architecture (180 nm), while the Atom Z500 uses Silverthorne (2008−2010) (45 nm). In PassMark, the Pentium III 1133 scores 180 against the Atom Z500's 165 — a 8.7% lead for the Pentium III 1133. Both processors carry 0 kB of L3 cache.
| Feature | Pentium III 1133 | Atom Z500 |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 1 |
| Boost Clock | 1.13 GHz+41% | 0.8 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 256 kB | 512 kB+100% |
| Process | 180 nm | 45 nm-75% |
| Architecture | Tualatin (2000−2002) | Silverthorne (2008−2010) |
| PassMark | 180+9% | 165 |
Memory & Platform
The Pentium III 1133 uses the PGA370 socket (PCIe 1.1), while the Atom Z500 uses PBGA441 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Pentium III 1133 | Atom Z500 |
|---|---|---|
| Socket | PGA370 | PBGA441 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | — | DDR2-533 |
| Max RAM Capacity | — | 2 GB |
| RAM Channels | — | 1 |
| ECC Support | — | ❌ |
| PCIe Lanes | — | 0 |
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