CPU
GPU
Athlon XP 2800+
Mobile Pentium 4 2.66
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 2800+ is positioned at rank 1125 and the Mobile Pentium 4 2.66 is on rank 771, 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 Athlon XP 2800+
Performance Per Dollar Mobile Pentium 4 2.66
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon XP 2800+ | Mobile Pentium 4 2.66 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($35) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Barton (2001−2004) / 130 nm) | 🛑 Legacy (Northwood (2002−2004) / 130 nm) |
💎 Value Proposition
| Insight | Athlon XP 2800+ | Mobile Pentium 4 2.66 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($35) | ✅ 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.
Path of Exile 2
Counter-Strike 2
Valorant
Technical Specifications
Side-by-side comparison of Athlon XP 2800+ and Mobile Pentium 4 2.66
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.
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.
Processing Power
The Athlon XP 2800+ packs 1 cores / 1 threads, matching the Mobile Pentium 4 2.66's 1 cores. Boost clocks reach 2.25 GHz on the Athlon XP 2800+ versus 2.67 GHz on the Mobile Pentium 4 2.66 — a 17.1% clock advantage for the Mobile Pentium 4 2.66. The Athlon XP 2800+ uses the Barton (2001−2004) architecture (130 nm), while the Mobile Pentium 4 2.66 uses Northwood (2002−2004) (130 nm). In PassMark, the Athlon XP 2800+ scores 380 against the Mobile Pentium 4 2.66's 395 — a 3.9% lead for the Mobile Pentium 4 2.66. Geekbench 6 single-core — the metric most relevant to gaming — records 250 vs 800, a 104.8% lead for the Mobile Pentium 4 2.66 that directly translates to higher frame rates. Multi-core Geekbench: 250 vs 800 (104.8% advantage for the Mobile Pentium 4 2.66). Both processors carry 0 kB of L3 cache.
| Feature | Athlon XP 2800+ | Mobile Pentium 4 2.66 |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 2 |
| Boost Clock | 2.25 GHz | 2.67 GHz+19% |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 512K | 512 kB |
| Process | 130 nm | 130 nm |
| Architecture | Barton (2001−2004) | Northwood (2002−2004) |
| PassMark | 380 | 395+4% |
| Geekbench 6 Single | 250 | 800+220% |
| Geekbench 6 Multi | 250 | 800+220% |
Memory & Platform
The Athlon XP 2800+ uses the A socket (PCIe 1.1), while the Mobile Pentium 4 2.66 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR-333 on the Athlon XP 2800+ versus DDR2 on the Mobile Pentium 4 2.66 — 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: KT400,nForce2 Ultra 400 (Athlon XP 2800+) and 852PM,855PM (Mobile Pentium 4 2.66).
| Feature | Athlon XP 2800+ | Mobile Pentium 4 2.66 |
|---|---|---|
| Socket | A | PGA478 |
| PCIe Generation | PCIe 1.1 | PCIe 1.1 |
| Max RAM Speed | DDR-333 | DDR2 |
| Max RAM Capacity | 2 GB | 4 GB+100% |
| 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: Athlon XP 2800+ targets Legacy Desktop, Mobile Pentium 4 2.66 targets Legacy Laptop.
| Feature | Athlon XP 2800+ | Mobile Pentium 4 2.66 |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | — | None |
| Unlocked | Yes | No |
| AVX-512 | No | No |
| Virtualization | None | None |
| Target Use | Legacy Desktop | Legacy Laptop |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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