Mobile Pentium 4 2.66 vs Ryzen 7 5800X
Mobile Pentium 4 2.66
Popular choices:
Ryzen 7 5800X
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. The Mobile Pentium 4 2.66 is positioned at rank #771 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Mobile Pentium 4 2.66
Performance Per Dollar Ryzen 7 5800X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Mobile Pentium 4 2.66 | Ryzen 7 5800X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($180) |
| Longevity | 🛑 Legacy (Northwood (2002−2004) / 130 nm) | ✨ Modern (Vermeer (Zen 3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Mobile Pentium 4 2.66 | Ryzen 7 5800X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($180) |
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 Ryzen 7 5800X
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.
Ryzen 7 5800X
The Ryzen 7 5800X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen 3) (2020−2022) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 4.7 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4. Passmark benchmark score: 27,712 points. Launch price was $449.
Processing Power
The Mobile Pentium 4 2.66 packs 1 cores / 2 threads, while the Ryzen 7 5800X offers 8 cores / 16 threads — the Ryzen 7 5800X has 7 more cores. Boost clocks reach 2.67 GHz on the Mobile Pentium 4 2.66 versus 4.7 GHz on the Ryzen 7 5800X — a 55.1% clock advantage for the Ryzen 7 5800X. The Mobile Pentium 4 2.66 uses the Northwood (2002−2004) architecture (130 nm), while the Ryzen 7 5800X uses Vermeer (Zen 3) (2020−2022) (7 nm, 12 nm). In PassMark, the Mobile Pentium 4 2.66 scores 395 against the Ryzen 7 5800X's 27,712 — a 194.4% lead for the Ryzen 7 5800X. L3 cache: 0 kB on the Mobile Pentium 4 2.66 vs 32 MB on the Ryzen 7 5800X.
| Feature | Mobile Pentium 4 2.66 | Ryzen 7 5800X |
|---|---|---|
| Cores / Threads | 1 / 2 | 8 / 16+700% |
| Boost Clock | 2.67 GHz | 4.7 GHz+76% |
| Base Clock | — | 3.8 GHz |
| L3 Cache | 0 kB | 32 MB |
| L2 Cache | 512 kB | 512K (per core) |
| Process | 130 nm | 7 nm, 12 nm-95% |
| Architecture | Northwood (2002−2004) | Vermeer (Zen 3) (2020−2022) |
| PassMark | 395 | 27,712+6916% |
| Geekbench 6 Single | 800 | — |
| Geekbench 6 Multi | 800 | — |
Memory & Platform
The Mobile Pentium 4 2.66 uses the PGA478 socket (PCIe 1.1), while the Ryzen 7 5800X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2 on the Mobile Pentium 4 2.66 versus DDR4-3200 on the Ryzen 7 5800X — the Ryzen 7 5800X supports 66.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 7 5800X supports up to 128 GB of RAM compared to 4 GB — 187.9% more capacity for professional workloads. Memory channels: 1 (Mobile Pentium 4 2.66) vs 2 (Ryzen 7 5800X). PCIe lanes: 0 (Mobile Pentium 4 2.66) vs 24 (Ryzen 7 5800X) — the Ryzen 7 5800X offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: 852PM,855PM (Mobile Pentium 4 2.66) and AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 7 5800X).
| Feature | Mobile Pentium 4 2.66 | Ryzen 7 5800X |
|---|---|---|
| Socket | PGA478 | AM4 |
| PCIe Generation | PCIe 1.1 | PCIe 4.0+264% |
| Max RAM Speed | DDR2 | DDR4-3200+100% |
| Max RAM Capacity | 4 GB | 128 GB+3100% |
| RAM Channels | 1 | 2+100% |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 0 | 24 |
Advanced Features
Only the Ryzen 7 5800X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: None (Mobile Pentium 4 2.66) vs AMD-V (Ryzen 7 5800X). Primary use case: Mobile Pentium 4 2.66 targets Legacy Laptop, Ryzen 7 5800X targets Desktop.
| Feature | Mobile Pentium 4 2.66 | Ryzen 7 5800X |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | — |
| Unlocked | No | Yes |
| AVX-512 | No | No |
| Virtualization | None | AMD-V |
| Target Use | Legacy Laptop | Desktop |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
You May Also Compare
Similar CPU comparisons based on Mobile Pentium 4 2.66 and Ryzen 7 5800X
