Athlon PRO 300U vs Ryzen 9 5900X
Athlon PRO 300U
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 PRO 300U is positioned at rank #1006 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 PRO 300U
Performance Per Dollar Ryzen 9 5900X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon PRO 300U | Ryzen 9 5900X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($350) |
| Longevity | ✨ Modern (Raven Ridge 2 (2019) / 14 nm) | ✨ Modern (Vermeer (Zen3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Athlon PRO 300U | Ryzen 9 5900X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ 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 PRO 300U and Ryzen 9 5900X
Athlon PRO 300U
The Athlon PRO 300U is manufactured by AMD. It was released in 2009-01-01. It is based on the Raven Ridge 2 (2019) architecture. It features 2 cores and 4 threads. Base frequency is 2.4 GHz, with boost up to 3.3 GHz. L3 cache: 4 MB (total). L2 cache: 512K (per core). Built on 14 nm process technology. Socket: FP5. Thermal design power (TDP): 15 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 4,080 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 PRO 300U packs 2 cores / 4 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 10 more cores. Boost clocks reach 3.3 GHz on the Athlon PRO 300U versus 4.8 GHz on the Ryzen 9 5900X — a 37% clock advantage for the Ryzen 9 5900X (base: 2.4 GHz vs 3.7 GHz). The Athlon PRO 300U uses the Raven Ridge 2 (2019) architecture (14 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Athlon PRO 300U scores 4,080 against the Ryzen 9 5900X's 38,955 — a 162.1% lead for the Ryzen 9 5900X. L3 cache: 4 MB (total) on the Athlon PRO 300U vs 64 MB on the Ryzen 9 5900X.
| Feature | Athlon PRO 300U | Ryzen 9 5900X |
|---|---|---|
| Cores / Threads | 2 / 4 | 12 / 24+500% |
| Boost Clock | 3.3 GHz | 4.8 GHz+45% |
| Base Clock | 2.4 GHz | 3.7 GHz+54% |
| L3 Cache | 4 MB (total) | 64 MB+1500% |
| L2 Cache | 512K (per core) | 512K (per core) |
| Process | 14 nm | 7 nm, 12 nm-50% |
| Architecture | Raven Ridge 2 (2019) | Vermeer (Zen3) (2020−2022) |
| PassMark | 4,080 | 38,955+855% |
| Cinebench R23 Multi | — | 21,000 |
| Geekbench 6 Single | — | 2,174 |
| Geekbench 6 Multi | — | 11,888 |
Memory & Platform
The Athlon PRO 300U uses the FP5 socket (PCIe 3.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Both support up to DDR4-2400 memory speed. The Ryzen 9 5900X supports up to 128 GB of RAM compared to 32 GB — 120% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 8 (Athlon PRO 300U) vs 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD FP5 (Athlon PRO 300U) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).
| Feature | Athlon PRO 300U | Ryzen 9 5900X |
|---|---|---|
| Socket | FP5 | AM4 |
| PCIe Generation | PCIe 3.0 | PCIe 4.0+33% |
| Max RAM Speed | DDR4-2400 | DDR4-3200 |
| Max RAM Capacity | 32 GB | 128 GB+300% |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 8 | 24+200% |
Advanced Features
Virtualization: not specified (Athlon PRO 300U) / AMD-V (Ryzen 9 5900X). The Athlon PRO 300U includes integrated graphics (AMD Radeon Vega 3), while the Ryzen 9 5900X requires a dedicated GPU. Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K.
| Feature | Athlon PRO 300U | Ryzen 9 5900X |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | AMD Radeon Vega 3 | — |
| Unlocked | — | Yes |
| AVX-512 | — | No |
| Virtualization | — | AMD-V |
| Target Use | — | Workstation |
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The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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