Pentium 4 2.66 vs Athlon XP 2800+
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 Pentium 4 2.66 is positioned at rank 1113 and the Athlon XP 2800+ is on rank 1125, so the 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 Pentium 4 2.66
Performance Per Dollar Athlon XP 2800+
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($300) | ✅ More affordable ($35) |
| Longevity | 🛑 Legacy (NetBurst (2000−2006) / 130 nm) | 🛑 Legacy (Barton (2001−2004) / 130 nm) |
💎 Value Proposition
| Insight | Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+762%) |
| Upfront Cost | ⚠️ Higher cost ($300) | ✅ More affordable ($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 Pentium 4 2.66 and Athlon XP 2800+
Pentium 4 2.66
The Pentium 4 2.66 is manufactured by Intel. It was released in 2007-01-01. It is based on the NetBurst (2000−2006) architecture. It features 1 cores and 1 threads. Max frequency: 2.66 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA478. Thermal design power (TDP): 110 Watt. Memory support: DDR1, DDR2. Passmark benchmark score: 378 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
Both the Pentium 4 2.66 and Athlon XP 2800+ share an identical 1-core/1-thread configuration. Boost clocks reach 2.66 GHz on the Pentium 4 2.66 versus 2.25 GHz on the Athlon XP 2800+ — a 16.7% clock advantage for the Pentium 4 2.66. The Pentium 4 2.66 uses the NetBurst (2000−2006) architecture (130 nm), while the Athlon XP 2800+ uses Barton (2001−2004) (130 nm). In PassMark, the Pentium 4 2.66 scores 378 against the Athlon XP 2800+'s 380 — a 0.5% lead for the Athlon XP 2800+. Both processors carry 0 kB of L3 cache.
| Feature | Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 1 |
| Boost Clock | 2.66 GHz+18% | 2.25 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 512 kB | 512K |
| Process | 130 nm | 130 nm |
| Architecture | NetBurst (2000−2006) | Barton (2001−2004) |
| PassMark | 378 | 380 |
| Geekbench 6 Single | — | 250 |
| Geekbench 6 Multi | — | 250 |
Memory & Platform
The 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.
| Feature | Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| Socket | PGA478 | A |
| PCIe Generation | PCIe 1.1 | PCIe 1.1 |
| Max RAM Speed | — | DDR-333 |
| Max RAM Capacity | — | 2 GB |
| RAM Channels | — | 1 |
| ECC Support | — | ❌ |
| PCIe Lanes | — | 0 |
Advanced Features
Virtualization: not specified (Pentium 4 2.66) / None (Athlon XP 2800+). Primary use case: Athlon XP 2800+ targets Legacy Desktop.
| Feature | Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| Integrated GPU | — | No |
| Unlocked | — | Yes |
| AVX-512 | — | No |
| Virtualization | — | None |
| Target Use | — | Legacy Desktop |
Value Analysis
The Pentium 4 2.66 launched at $300 MSRP, while the Athlon XP 2800+ debuted at $375. At current prices ($300 vs $35), the Athlon XP 2800+ is $265 cheaper. In terms of value (PassMark points per dollar), the Pentium 4 2.66 delivers 1.3 pts/$ vs 10.9 pts/$ for the Athlon XP 2800+ — making the Athlon XP 2800+ the 158.4% better value option.
| Feature | Pentium 4 2.66 | Athlon XP 2800+ |
|---|---|---|
| MSRP | $300-20% | $375 |
| Avg Price (30d) | $300 | $35-88% |
| Performance per Dollar | 1.3 | 10.9+738% |
| Release Date | 2002 | 2001 |
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