Xeon 2.66 vs Ryzen 7 7800X3D
Xeon 2.66
Popular choices:
Ryzen 7 7800X3D
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 Xeon 2.66 is positioned at rank #1028 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 Xeon 2.66
Performance Per Dollar Ryzen 7 7800X3D
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon 2.66 | Ryzen 7 7800X3D |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($10) | ⚠️ Higher cost ($384) |
| Longevity | 🛑 Legacy (Prestonia (2002) / 130 nm) | ✨ Modern (Raphael (Zen4) (2022−2023) / 5 nm) |
💎 Value Proposition
| Insight | Xeon 2.66 | Ryzen 7 7800X3D |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+101%) |
| Upfront Cost | ✅ More affordable ($10) | ⚠️ Higher cost ($384) |
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 Xeon 2.66 and Ryzen 7 7800X3D
Xeon 2.66
The Xeon 2.66 is manufactured by Intel. It was released in 2015-01-01. It is based on the Prestonia (2002) 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: PGA604. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 445 points. Launch price was $800.
Ryzen 7 7800X3D
The Ryzen 7 7800X3D is manufactured by AMD. It was released in 4 January 2023 (2 years ago). It is based on the Raphael (Zen4) (2022−2023) architecture. It features 8 cores and 16 threads. Base frequency is 4.4 GHz, with boost up to 5 GHz. L3 cache: 96 MB (total). L2 cache: 1 MB (per core). Built on 5 nm process technology. Socket: AM5. Thermal design power (TDP): 120 Watt. Memory support: DDR5-5200. Passmark benchmark score: 34,293 points. Launch price was $449.
Processing Power
The Xeon 2.66 packs 1 cores / 1 threads, while the Ryzen 7 7800X3D offers 8 cores / 16 threads — the Ryzen 7 7800X3D has 7 more cores. Boost clocks reach 2.66 GHz on the Xeon 2.66 versus 5 GHz on the Ryzen 7 7800X3D — a 61.1% clock advantage for the Ryzen 7 7800X3D. The Xeon 2.66 uses the Prestonia (2002) architecture (130 nm), while the Ryzen 7 7800X3D uses Raphael (Zen4) (2022−2023) (5 nm). In PassMark, the Xeon 2.66 scores 445 against the Ryzen 7 7800X3D's 34,293 — a 194.9% lead for the Ryzen 7 7800X3D. L3 cache: 0 kB on the Xeon 2.66 vs 96 MB (total) on the Ryzen 7 7800X3D.
| Feature | Xeon 2.66 | Ryzen 7 7800X3D |
|---|---|---|
| Cores / Threads | 1 / 1 | 8 / 16+700% |
| Boost Clock | 2.66 GHz | 5 GHz+88% |
| Base Clock | — | 4.4 GHz |
| L3 Cache | 0 kB | 96 MB (total) |
| L2 Cache | 512 kB | 1 MB (per core)+100% |
| Process | 130 nm | 5 nm-96% |
| Architecture | Prestonia (2002) | Raphael (Zen4) (2022−2023) |
| PassMark | 445 | 34,293+7606% |
| Cinebench R23 Multi | — | 18,500 |
| Geekbench 6 Single | — | 2,700 |
| Geekbench 6 Multi | — | 15,000 |
Memory & Platform
The Xeon 2.66 uses the PGA604 socket (PCIe 2.0), while the Ryzen 7 7800X3D uses AM5 (PCIe 5.0) — making them incompatible on the same motherboard.
| Feature | Xeon 2.66 | Ryzen 7 7800X3D |
|---|---|---|
| Socket | PGA604 | AM5 |
| PCIe Generation | PCIe 2.0 | PCIe 5.0+150% |
| Max RAM Speed | — | DDR5-5200 |
| Max RAM Capacity | — | 128 GB |
| RAM Channels | — | 2 |
| ECC Support | — | ✅ |
| PCIe Lanes | — | 28 |
Advanced Features
Virtualization: not specified (Xeon 2.66) / AMD-V (Ryzen 7 7800X3D). The Ryzen 7 7800X3D includes integrated graphics (AMD Radeon Graphics (2-core)), while the Xeon 2.66 requires a dedicated GPU. Primary use case: Ryzen 7 7800X3D targets Gaming. Direct competitor: Ryzen 7 7800X3D rivals Intel Core i7-14700K.
| Feature | Xeon 2.66 | Ryzen 7 7800X3D |
|---|---|---|
| Integrated GPU | — | Yes |
| IGPU Model | — | AMD Radeon Graphics (2-core) |
| Unlocked | — | Yes |
| AVX-512 | — | Yes |
| Virtualization | — | AMD-V |
| Target Use | — | Gaming |
Value Analysis
The Xeon 2.66 launched at $337 MSRP, while the Ryzen 7 7800X3D debuted at $449. At current prices ($10 vs $384), the Xeon 2.66 is $374 cheaper. In terms of value (PassMark points per dollar), the Xeon 2.66 delivers 44.5 pts/$ vs 89.3 pts/$ for the Ryzen 7 7800X3D — making the Ryzen 7 7800X3D the 67% better value option.
| Feature | Xeon 2.66 | Ryzen 7 7800X3D |
|---|---|---|
| MSRP | $337-25% | $449 |
| Avg Price (30d) | $10-97% | $384 |
| Performance per Dollar | 44.5 | 89.3+101% |
| Release Date | 2002 | 2023 |
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