Ryzen 9 9900X vs Ryzen 9 7945HX
Ryzen 9 9900X
Ryzen 9 7945HX
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 9900X
Performance Per Dollar Ryzen 9 7945HX
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 9 9900X | Ryzen 9 7945HX |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($370) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Granite Ridge (2024−2025) / 4 nm) | ✨ Modern (Dragon Range-HX (Zen 4) (2023−2024) / CCD = 5 nm, I/O = 6 nm) |
💎 Value Proposition
| Insight | Ryzen 9 9900X | Ryzen 9 7945HX |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($370) | ✅ More affordable ($0) |
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 9900X and Ryzen 9 7945HX
Ryzen 9 9900X
The Ryzen 9 9900X is manufactured by AMD. It was released in 15 August 2024 (1 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 5.6 GHz. L3 cache: 64 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: 54,530 points. Launch price was $499.
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.
Processing Power
The Ryzen 9 9900X packs 12 cores / 24 threads, while the Ryzen 9 7945HX offers 16 cores / 32 threads — the Ryzen 9 7945HX has 4 more cores. Boost clocks reach 5.6 GHz on the Ryzen 9 9900X versus 5.4 GHz on the Ryzen 9 7945HX — a 3.6% clock advantage for the Ryzen 9 9900X (base: 4.4 GHz vs 2.5 GHz). The Ryzen 9 9900X uses the Granite Ridge (2024−2025) architecture (4 nm), while the Ryzen 9 7945HX uses Dragon Range-HX (Zen 4) (2023−2024) (CCD = 5 nm, I/O = 6 nm). In PassMark, the Ryzen 9 9900X scores 54,530 against the Ryzen 9 7945HX's 54,425 — a 0.2% lead for the Ryzen 9 9900X. Cinebench R23 multi-core: 33,003 vs 34,521 (4.5% advantage for the Ryzen 9 7945HX). Geekbench 6 single-core — the metric most relevant to gaming — records 3,401 vs 2,774, a 20.3% lead for the Ryzen 9 9900X that directly translates to higher frame rates. Multi-core Geekbench: 19,756 vs 16,214 (19.7% advantage for the Ryzen 9 9900X). Both processors carry 64 MB (total) of L3 cache.
| Feature | Ryzen 9 9900X | Ryzen 9 7945HX |
|---|---|---|
| Cores / Threads | 12 / 24 | 16 / 32+33% |
| Boost Clock | 5.6 GHz+4% | 5.4 GHz |
| Base Clock | 4.4 GHz+76% | 2.5 GHz |
| L3 Cache | 64 MB (total) | 64 MB (total) |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 4 nm-20% | CCD = 5 nm, I/O = 6 nm |
| Architecture | Granite Ridge (2024−2025) | Dragon Range-HX (Zen 4) (2023−2024) |
| PassMark | 54,530 | 54,425 |
| Cinebench R23 Multi | 33,003 | 34,521+5% |
| Geekbench 6 Single | 3,401+23% | 2,774 |
| Geekbench 6 Multi | 19,756+22% | 16,214 |
Memory & Platform
The Ryzen 9 9900X uses the AM5 socket (PCIe 5.0), while the Ryzen 9 7945HX uses FL1 (PCIe 5.0) — making them incompatible on the same motherboard. Both support up to DDR5-5600 memory speed. The Ryzen 9 9900X supports up to 256 GB of RAM compared to 64 GB — 120% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 24 (Ryzen 9 9900X) vs 28 (Ryzen 9 7945HX) — the Ryzen 9 7945HX offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A620,B650,X670,X870 (Ryzen 9 9900X) and FL1 (Ryzen 9 7945HX).
| Feature | Ryzen 9 9900X | Ryzen 9 7945HX |
|---|---|---|
| Socket | AM5 | FL1 |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| Max RAM Speed | DDR5-5600 | DDR5-5200 |
| Max RAM Capacity | 256 GB+300% | 64 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 24 | 28+17% |
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 9900X) and Radeon 610M (Ryzen 9 7945HX) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Ryzen 9 7945HX targets Extreme Gaming / Mobile Workstation. Direct competitor: Ryzen 9 7945HX rivals Core i9-14900HX.
| Feature | Ryzen 9 9900X | Ryzen 9 7945HX |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Radeon 610M | Radeon 610M |
| Unlocked | Yes | Yes |
| AVX-512 | Yes | Yes |
| Virtualization | AMD-V | AMD-V |
| Target Use | — | Extreme Gaming / Mobile Workstation |
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