Ryzen 9 7945HX vs Ryzen 9 9900X3D
Ryzen 9 7945HX
Ryzen 9 9900X3D
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. 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 Ryzen 9 7945HX
Performance Per Dollar Ryzen 9 9900X3D
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 9 7945HX | Ryzen 9 9900X3D |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($589) |
| Longevity | ✨ Modern (Dragon Range-HX (Zen 4) (2023−2024) / CCD = 5 nm, I/O = 6 nm) | ✨ Modern (Granite Ridge (2024−2025) / 4 nm) |
💎 Value Proposition
| Insight | Ryzen 9 7945HX | Ryzen 9 9900X3D |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($589) |
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 Ryzen 9 7945HX and Ryzen 9 9900X3D
Ryzen 9 7945HX
The Ryzen 9 7945HX is manufactured by AMD. It was released in 2023-03-12. It is based on the Dragon Range-HX (Zen 4) (2023−2024) architecture. It features 16 cores and 32 threads. Base frequency is 2.5 GHz, with boost up to 5.4 GHz. L3 cache: 64 MB (total). L2 cache: 1 MB (per core). Built on CCD = 5 nm, I/O = 6 nm process technology. Socket: FL1. Thermal design power (TDP): 55 Watt. Memory support: DDR5. Passmark benchmark score: 54,425 points. Launch price was $700.
Ryzen 9 9900X3D
The Ryzen 9 9900X3D is manufactured by AMD. It was released in 6 January 2025 (less than a year ago). It is based on the Granite Ridge (2024−2025) architecture. It features 12 cores and 24 threads. Base frequency is 4.4 GHz, with boost up to 5.5 GHz. L3 cache: 128 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: AM5. Thermal design power (TDP): 120 Watt. Memory support: DDR5. Passmark benchmark score: 56,301 points. Launch price was $599.
Processing Power
The Ryzen 9 7945HX packs 16 cores / 32 threads, while the Ryzen 9 9900X3D offers 12 cores / 24 threads — the Ryzen 9 7945HX has 4 more cores. Boost clocks reach 5.4 GHz on the Ryzen 9 7945HX versus 5.5 GHz on the Ryzen 9 9900X3D — a 1.8% clock advantage for the Ryzen 9 9900X3D (base: 2.5 GHz vs 4.4 GHz). The Ryzen 9 7945HX uses the Dragon Range-HX (Zen 4) (2023−2024) architecture (CCD = 5 nm, I/O = 6 nm), while the Ryzen 9 9900X3D uses Granite Ridge (2024−2025) (4 nm). In PassMark, the Ryzen 9 7945HX scores 54,425 against the Ryzen 9 9900X3D's 56,301 — a 3.4% lead for the Ryzen 9 9900X3D. Geekbench 6 single-core — the metric most relevant to gaming — records 2,774 vs 3,400, a 20.3% lead for the Ryzen 9 9900X3D that directly translates to higher frame rates. Multi-core Geekbench: 16,214 vs 26,000 (46.4% advantage for the Ryzen 9 9900X3D). L3 cache: 64 MB (total) on the Ryzen 9 7945HX vs 128 MB (total) on the Ryzen 9 9900X3D.
| Feature | Ryzen 9 7945HX | Ryzen 9 9900X3D |
|---|---|---|
| Cores / Threads | 16 / 32+33% | 12 / 24 |
| Boost Clock | 5.4 GHz | 5.5 GHz+2% |
| Base Clock | 2.5 GHz | 4.4 GHz+76% |
| L3 Cache | 64 MB (total) | 128 MB (total)+100% |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | CCD = 5 nm, I/O = 6 nm | 4 nm-20% |
| Architecture | Dragon Range-HX (Zen 4) (2023−2024) | Granite Ridge (2024−2025) |
| PassMark | 54,425 | 56,301+3% |
| Cinebench R23 Multi | 34,521 | — |
| Geekbench 6 Single | 2,774 | 3,400+23% |
| Geekbench 6 Multi | 16,214 | 26,000+60% |
Memory & Platform
The Ryzen 9 7945HX uses the FL1 socket (PCIe 5.0), while the Ryzen 9 9900X3D uses AM5 (PCIe 5.0) — making them incompatible on the same motherboard. Both support up to DDR5-5200 memory speed. The Ryzen 9 9900X3D supports up to 192 GB of RAM compared to 64 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 28 (Ryzen 9 7945HX) vs 24 (Ryzen 9 9900X3D) — the Ryzen 9 7945HX offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: FL1 (Ryzen 9 7945HX) and X670,X670E,X870,X870E (Ryzen 9 9900X3D).
| Feature | Ryzen 9 7945HX | Ryzen 9 9900X3D |
|---|---|---|
| Socket | FL1 | AM5 |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| Max RAM Speed | DDR5-5200 | DDR5-5600 |
| Max RAM Capacity | 64 GB | 192 GB+200% |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 28+17% | 24 |
Advanced Features
Both processors feature an unlocked multiplier for overclocking. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Both support AMD-V virtualization. Both include integrated graphics — Radeon 610M (Ryzen 9 7945HX) and AMD Radeon Graphics (2 Cores) (Ryzen 9 9900X3D) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Ryzen 9 7945HX targets Extreme Gaming / Mobile Workstation, Ryzen 9 9900X3D targets High End Gaming/Creation. Direct competitor: Ryzen 9 7945HX rivals Core i9-14900HX; Ryzen 9 9900X3D rivals Core Ultra 9 285K.
| Feature | Ryzen 9 7945HX | Ryzen 9 9900X3D |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Radeon 610M | AMD Radeon Graphics (2 Cores) |
| Unlocked | Yes | Yes |
| AVX-512 | Yes | Yes |
| Virtualization | AMD-V | AMD-V |
| Target Use | Extreme Gaming / Mobile Workstation | High End Gaming/Creation |
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