Pentium III 1400 vs Atom E660
Pentium III 1400
Atom E660
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 1400 is positioned at rank 1128 and the Atom E660 is on rank 743, so the Atom E660 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 1400
Performance Per Dollar Atom E660
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Pentium III 1400 | Atom E660 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($20) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Tualatin (2000−2002) / 130 nm) | 🛑 Legacy (Tunnel Creek (2010) / 45 nm) |
💎 Value Proposition
| Insight | Pentium III 1400 | Atom E660 |
|---|---|---|
| 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 Pentium III 1400 and Atom E660
Pentium III 1400
The Pentium III 1400 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: 1.4 GHz. L3 cache: 0 kB. L2 cache: 256 kB. Built on 130 nm process technology. Socket: PGA370. Thermal design power (TDP): 31 Watt. Passmark benchmark score: 228 points. Launch price was $69.
Atom E660
The Atom E660 is manufactured by Intel. It was released in 14 September 2010 (15 years ago). It is based on the Tunnel Creek (2010) architecture. It features 1 cores and 2 threads. Max frequency: 1.3 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: BGA676. Thermal design power (TDP): 3 Watt. Memory support: DDR2. Passmark benchmark score: 275 points. Launch price was $54.
Processing Power
The Pentium III 1400 packs 1 cores / 1 threads, matching the Atom E660's 1 cores. Boost clocks reach 1.4 GHz on the Pentium III 1400 versus 1.3 GHz on the Atom E660 — a 7.4% clock advantage for the Pentium III 1400. The Pentium III 1400 uses the Tualatin (2000−2002) architecture (130 nm), while the Atom E660 uses Tunnel Creek (2010) (45 nm). In PassMark, the Pentium III 1400 scores 228 against the Atom E660's 275 — a 18.7% lead for the Atom E660. Both processors carry 0 kB of L3 cache.
| Feature | Pentium III 1400 | Atom E660 |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 2 |
| Boost Clock | 1.4 GHz+8% | 1.3 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 256 kB | 512 kB (per core)+100% |
| Process | 130 nm | 45 nm-65% |
| Architecture | Tualatin (2000−2002) | Tunnel Creek (2010) |
| PassMark | 228 | 275+21% |
Memory & Platform
The Pentium III 1400 uses the PGA370 socket (PCIe 1.1), while the Atom E660 uses BGA676 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Pentium III 1400 | Atom E660 |
|---|---|---|
| Socket | PGA370 | BGA676 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | — | DDR2-800 |
| Max RAM Capacity | — | 2 GB |
| RAM Channels | — | 1 |
| ECC Support | — | ❌ |
| PCIe Lanes | — | 4 |
Advanced Features
The Atom E660 includes integrated graphics (Intel GMA 600), while the Pentium III 1400 requires a dedicated GPU.
| Feature | Pentium III 1400 | Atom E660 |
|---|---|---|
| Integrated GPU | — | Yes |
| IGPU Model | — | Intel GMA 600 |
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