Athlon X2 450 vs Ryzen 9 5900X
Athlon X2 450
Ryzen 9 5900X
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 450 is positioned at rank #760 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 450
Performance Per Dollar Ryzen 9 5900X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon X2 450 | Ryzen 9 5900X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($15) | ⚠️ Higher cost ($350) |
| Longevity | 🛑 Legacy (Kaveri (2014−2015) / 28 nm) | ✨ Modern (Vermeer (Zen3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Athlon X2 450 | Ryzen 9 5900X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+29%) |
| Upfront Cost | ✅ More affordable ($15) | ⚠️ Higher cost ($350) |
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 450 and Ryzen 9 5900X
Athlon X2 450
The Athlon X2 450 is manufactured by AMD. It was released in 2009-01-01. It is based on the Kaveri (2014−2015) architecture. It features 2 cores and 2 threads. Base frequency is 3.5 GHz, with boost up to 3.9 GHz. L2 cache: 1 MB (total). Built on 28 nm process technology. Socket: FM2+. Thermal design power (TDP): 65 Watt. Memory support: DDR3-1866. Passmark benchmark score: 1,295 points. Launch price was $149.
Ryzen 9 5900X
The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.
Processing Power
The Athlon X2 450 packs 2 cores / 2 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 10 more cores. Boost clocks reach 3.9 GHz on the Athlon X2 450 versus 4.8 GHz on the Ryzen 9 5900X — a 20.7% clock advantage for the Ryzen 9 5900X (base: 3.5 GHz vs 3.7 GHz). The Athlon X2 450 uses the Kaveri (2014−2015) architecture (28 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Athlon X2 450 scores 1,295 against the Ryzen 9 5900X's 38,955 — a 187.1% lead for the Ryzen 9 5900X. Cinebench R23 multi-core: 1,500 vs 21,000 (173.3% advantage for the Ryzen 9 5900X). Geekbench 6 single-core — the metric most relevant to gaming — records 450 vs 2,174, a 131.4% lead for the Ryzen 9 5900X that directly translates to higher frame rates. Multi-core Geekbench: 800 vs 11,888 (174.8% advantage for the Ryzen 9 5900X).
| Feature | Athlon X2 450 | Ryzen 9 5900X |
|---|---|---|
| Cores / Threads | 2 / 2 | 12 / 24+500% |
| Boost Clock | 3.9 GHz | 4.8 GHz+23% |
| Base Clock | 3.5 GHz | 3.7 GHz+6% |
| L3 Cache | — | 64 MB |
| L2 Cache | 1 MB (total)+100% | 512K (per core) |
| Process | 28 nm | 7 nm, 12 nm-75% |
| Architecture | Kaveri (2014−2015) | Vermeer (Zen3) (2020−2022) |
| PassMark | 1,295 | 38,955+2908% |
| Cinebench R23 Multi | 1,500 | 21,000+1300% |
| Geekbench 6 Single | 450 | 2,174+383% |
| Geekbench 6 Multi | 800 | 11,888+1386% |
Memory & Platform
The Athlon X2 450 uses the FM2+ socket (PCIe 3.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1866 on the Athlon X2 450 versus DDR4-3200 on the Ryzen 9 5900X — the Ryzen 9 5900X supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 5900X supports up to 128 GB of RAM compared to 16 GB — 155.6% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Athlon X2 450) vs 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A88X,A78,A68H (Athlon X2 450) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).
| Feature | Athlon X2 450 | Ryzen 9 5900X |
|---|---|---|
| Socket | FM2+ | AM4 |
| PCIe Generation | PCIe 3.0 | PCIe 4.0+33% |
| Max RAM Speed | DDR3-1866 | DDR4-3200+33% |
| Max RAM Capacity | 16 GB | 128 GB+700% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 16 | 24+50% |
Advanced Features
Only the Ryzen 9 5900X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support AMD-V virtualization. Primary use case: Athlon X2 450 targets Basic Desktop, Ryzen 9 5900X targets Workstation. Direct competitor: Athlon X2 450 rivals Core i3-3220; Ryzen 9 5900X rivals Core i9-12900K.
| Feature | Athlon X2 450 | Ryzen 9 5900X |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | — |
| Unlocked | No | Yes |
| AVX-512 | No | No |
| Virtualization | AMD-V | AMD-V |
| Target Use | Basic Desktop | Workstation |
Value Analysis
The Athlon X2 450 launched at $60 MSRP, while the Ryzen 9 5900X debuted at $549. At current prices ($15 vs $350), the Athlon X2 450 is $335 cheaper. In terms of value (PassMark points per dollar), the Athlon X2 450 delivers 86.3 pts/$ vs 111.3 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 25.3% better value option.
| Feature | Athlon X2 450 | Ryzen 9 5900X |
|---|---|---|
| MSRP | $60-89% | $549 |
| Avg Price (30d) | $15-96% | $350 |
| Performance per Dollar | 86.3 | 111.3+29% |
| Release Date | 2014 | 2020 |
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