Athlon II M300 vs Ryzen 9 5900X
Athlon II M300
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 II M300 is positioned at rank #940 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 II M300
Performance Per Dollar Ryzen 9 5900X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon II M300 | Ryzen 9 5900X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($10) | ⚠️ Higher cost ($350) |
| Longevity | 🛑 Legacy (Caspian (2009) / 45 nm) | ✨ Modern (Vermeer (Zen3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Athlon II M300 | Ryzen 9 5900X |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+53%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($10) | ⚠️ 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 II M300 and Ryzen 9 5900X
Athlon II M300
The Athlon II M300 is manufactured by AMD. It was released in 2009-01-01. It is based on the Caspian (2009) architecture. It features 2 cores and 2 threads. Max frequency: 2 GHz. L2 cache: 1 MB. Built on 45 nm process technology. Socket: S1g3. Thermal design power (TDP): 1 MB. Memory support: DDR2. Passmark benchmark score: 1,700 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 II M300 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 2 GHz on the Athlon II M300 versus 4.8 GHz on the Ryzen 9 5900X — a 82.4% clock advantage for the Ryzen 9 5900X. The Athlon II M300 uses the Caspian (2009) architecture (45 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Athlon II M300 scores 1,700 against the Ryzen 9 5900X's 38,955 — a 183.3% lead for the Ryzen 9 5900X.
| Feature | Athlon II M300 | Ryzen 9 5900X |
|---|---|---|
| Cores / Threads | 2 / 2 | 12 / 24+500% |
| Boost Clock | 2 GHz | 4.8 GHz+140% |
| Base Clock | — | 3.7 GHz |
| L3 Cache | — | 64 MB |
| L2 Cache | 1 MB+100% | 512K (per core) |
| Process | 45 nm | 7 nm, 12 nm-84% |
| Architecture | Caspian (2009) | Vermeer (Zen3) (2020−2022) |
| PassMark | 1,700 | 38,955+2191% |
| Cinebench R23 Multi | — | 21,000 |
| Geekbench 6 Single | — | 2,174 |
| Geekbench 6 Multi | — | 11,888 |
Memory & Platform
The Athlon II M300 uses the S1g3 socket (PCIe 2.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 800 on the Athlon II M300 versus DDR4-3200 on the Ryzen 9 5900X — the Athlon II M300 supports 198% 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 8 — 176.5% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Athlon II M300) vs 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: S1g3 (Athlon II M300) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).
| Feature | Athlon II M300 | Ryzen 9 5900X |
|---|---|---|
| Socket | S1g3 | AM4 |
| PCIe Generation | PCIe 2.0 | PCIe 4.0+100% |
| Max RAM Speed | 800+19900% | DDR4-3200 |
| Max RAM Capacity | 8 | 128 GB+1677721500% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 0 | 24 |
Advanced Features
Only the Ryzen 9 5900X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: true (Athlon II M300) vs AMD-V (Ryzen 9 5900X). Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Athlon II M300 rivals Core 2 Duo T6400; Ryzen 9 5900X rivals Core i9-12900K.
| Feature | Athlon II M300 | Ryzen 9 5900X |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | — |
| Unlocked | No | Yes |
| AVX-512 | No | No |
| Virtualization | true | AMD-V |
| Target Use | — | Workstation |
Value Analysis
The Athlon II M300 launched at $100 MSRP, while the Ryzen 9 5900X debuted at $549. At current prices ($10 vs $350), the Athlon II M300 is $340 cheaper. In terms of value (PassMark points per dollar), the Athlon II M300 delivers 170.0 pts/$ vs 111.3 pts/$ for the Ryzen 9 5900X — making the Athlon II M300 the 41.7% better value option.
| Feature | Athlon II M300 | Ryzen 9 5900X |
|---|---|---|
| MSRP | $100-82% | $549 |
| Avg Price (30d) | $10-97% | $350 |
| Performance per Dollar | 170.0+53% | 111.3 |
| Release Date | 2009 | 2020 |
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