Athlon X2 QL-66 vs Ryzen 5 5600X
Athlon X2 QL-66
Popular choices:
Ryzen 5 5600X
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 Athlon X2 QL-66 is positioned at rank #1048 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 Athlon X2 QL-66
Performance Per Dollar Ryzen 5 5600X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon X2 QL-66 | Ryzen 5 5600X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($5) | ⚠️ Higher cost ($135) |
| Longevity | 🛑 Legacy (Lion (2008−2009) / 65 nm) | ✨ Modern (Vermeer (Zen 3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Athlon X2 QL-66 | Ryzen 5 5600X |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+109%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($5) | ⚠️ Higher cost ($135) |
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 Athlon X2 QL-66 and Ryzen 5 5600X
Athlon X2 QL-66
The Athlon X2 QL-66 is manufactured by AMD. It was released in 2009-01-01. It is based on the Lion (2008−2009) architecture. It features 2 cores and 2 threads. Max frequency: 2.2 GHz. L2 cache: 1 MB. Built on 65 nm process technology. Socket: S1g2. Thermal design power (TDP): 1 MB. Passmark benchmark score: 1,695 points. Launch price was $149.
Ryzen 5 5600X
The Ryzen 5 5600X 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 6 cores and 12 threads. Base frequency is 3.7 GHz, with boost up to 4.6 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 65 Watt. Memory support: DDR4. Passmark benchmark score: 21,845 points. Launch price was $299.
Processing Power
The Athlon X2 QL-66 packs 2 cores / 2 threads, while the Ryzen 5 5600X offers 6 cores / 12 threads — the Ryzen 5 5600X has 4 more cores. Boost clocks reach 2.2 GHz on the Athlon X2 QL-66 versus 4.6 GHz on the Ryzen 5 5600X — a 70.6% clock advantage for the Ryzen 5 5600X. The Athlon X2 QL-66 uses the Lion (2008−2009) architecture (65 nm), while the Ryzen 5 5600X uses Vermeer (Zen 3) (2020−2022) (7 nm, 12 nm). In PassMark, the Athlon X2 QL-66 scores 1,695 against the Ryzen 5 5600X's 21,845 — a 171.2% lead for the Ryzen 5 5600X.
| Feature | Athlon X2 QL-66 | Ryzen 5 5600X |
|---|---|---|
| Cores / Threads | 2 / 2 | 6 / 12+200% |
| Boost Clock | 2.2 GHz | 4.6 GHz+109% |
| Base Clock | — | 3.7 GHz |
| L3 Cache | — | 32 MB |
| L2 Cache | 1 MB+100% | 512K (per core) |
| Process | 65 nm | 7 nm, 12 nm-89% |
| Architecture | Lion (2008−2009) | Vermeer (Zen 3) (2020−2022) |
| PassMark | 1,695 | 21,845+1189% |
Memory & Platform
The Athlon X2 QL-66 uses the S1g2 socket (PCIe 2.0), while the Ryzen 5 5600X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2-667 on the Athlon X2 QL-66 versus DDR4-3200 on the Ryzen 5 5600X — the Ryzen 5 5600X supports 66.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 5 5600X supports up to 128 GB of RAM compared to 8 GB — 176.5% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Athlon X2 QL-66) vs 24 (Ryzen 5 5600X) — the Ryzen 5 5600X offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD S1 (Athlon X2 QL-66) and AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 5 5600X).
| Feature | Athlon X2 QL-66 | Ryzen 5 5600X |
|---|---|---|
| Socket | S1g2 | AM4 |
| PCIe Generation | PCIe 2.0 | PCIe 4.0+100% |
| Max RAM Speed | DDR2-667 | DDR4-3200+100% |
| Max RAM Capacity | 8 GB | 128 GB+1500% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 0 | 24 |
Advanced Features
Virtualization: not specified (Athlon X2 QL-66) / AMD-V (Ryzen 5 5600X). Primary use case: Ryzen 5 5600X targets Desktop.
| Feature | Athlon X2 QL-66 | Ryzen 5 5600X |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | — | Yes |
| AVX-512 | — | No |
| Virtualization | — | AMD-V |
| Target Use | — | Desktop |
Value Analysis
The Athlon X2 QL-66 launched at $150 MSRP, while the Ryzen 5 5600X debuted at $299. At current prices ($5 vs $135), the Athlon X2 QL-66 is $130 cheaper. In terms of value (PassMark points per dollar), the Athlon X2 QL-66 delivers 339.0 pts/$ vs 161.8 pts/$ for the Ryzen 5 5600X — making the Athlon X2 QL-66 the 70.8% better value option.
| Feature | Athlon X2 QL-66 | Ryzen 5 5600X |
|---|---|---|
| MSRP | $150-50% | $299 |
| Avg Price (30d) | $5-96% | $135 |
| Performance per Dollar | 339.0+110% | 161.8 |
| Release Date | 2009 | 2020 |
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