Mobile Pentium 4 2.66 vs Athlon XP 2800+
Mobile Pentium 4 2.66
Athlon XP 2800+
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 Mobile Pentium 4 2.66 is positioned at rank 771 and the Athlon XP 2800+ is on rank 1125, so the Mobile Pentium 4 2.66 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Mobile Pentium 4 2.66
Performance Per Dollar Athlon XP 2800+
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Mobile Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($35) |
| Longevity | 🛑 Legacy (Northwood (2002−2004) / 130 nm) | 🛑 Legacy (Barton (2001−2004) / 130 nm) |
💎 Value Proposition
| Insight | Mobile Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($35) |
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 Mobile Pentium 4 2.66 and Athlon XP 2800+
Mobile Pentium 4 2.66
The Mobile Pentium 4 2.66 is manufactured by Intel. It was released in Junho 2003 (22 years ago). It is based on the Northwood (2002−2004) architecture. It features 1 cores and 2 threads. Max frequency: 2.67 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA478. Thermal design power (TDP): 66 Watt. Memory support: DDR1, DDR2. Passmark benchmark score: 395 points. Launch price was $69.
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.
Processing Power
The Mobile Pentium 4 2.66 packs 1 cores / 2 threads, matching the Athlon XP 2800+'s 1 cores. Boost clocks reach 2.67 GHz on the Mobile Pentium 4 2.66 versus 2.25 GHz on the Athlon XP 2800+ — a 17.1% clock advantage for the Mobile Pentium 4 2.66. The Mobile Pentium 4 2.66 uses the Northwood (2002−2004) architecture (130 nm), while the Athlon XP 2800+ uses Barton (2001−2004) (130 nm). In PassMark, the Mobile Pentium 4 2.66 scores 395 against the Athlon XP 2800+'s 380 — a 3.9% lead for the Mobile Pentium 4 2.66. Geekbench 6 single-core — the metric most relevant to gaming — records 800 vs 250, a 104.8% lead for the Mobile Pentium 4 2.66 that directly translates to higher frame rates. Multi-core Geekbench: 800 vs 250 (104.8% advantage for the Mobile Pentium 4 2.66). Both processors carry 0 kB of L3 cache.
| Feature | Mobile Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| Cores / Threads | 1 / 2 | 1 / 1 |
| Boost Clock | 2.67 GHz+19% | 2.25 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 512 kB | 512K |
| Process | 130 nm | 130 nm |
| Architecture | Northwood (2002−2004) | Barton (2001−2004) |
| PassMark | 395+4% | 380 |
| Geekbench 6 Single | 800+220% | 250 |
| Geekbench 6 Multi | 800+220% | 250 |
Memory & Platform
The Mobile Pentium 4 2.66 uses the PGA478 socket (PCIe 1.1), while the Athlon XP 2800+ uses A (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2 on the Mobile Pentium 4 2.66 versus DDR-333 on the Athlon XP 2800+ — the Mobile Pentium 4 2.66 supports -202.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Mobile Pentium 4 2.66 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: 852PM,855PM (Mobile Pentium 4 2.66) and KT400,nForce2 Ultra 400 (Athlon XP 2800+).
| Feature | Mobile Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| Socket | PGA478 | A |
| PCIe Generation | PCIe 1.1 | PCIe 1.1 |
| Max RAM Speed | DDR2 | DDR-333 |
| Max RAM Capacity | 4 GB+100% | 2 GB |
| RAM Channels | 1 | 1 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 0 |
Advanced Features
Only the Athlon XP 2800+ has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support None virtualization. Primary use case: Mobile Pentium 4 2.66 targets Legacy Laptop, Athlon XP 2800+ targets Legacy Desktop.
| Feature | Mobile Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | — |
| Unlocked | No | Yes |
| AVX-512 | No | No |
| Virtualization | None | None |
| Target Use | Legacy Laptop | Legacy Desktop |
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The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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