Ryzen 9 8945H vs Ryzen 9 3900
Ryzen 9 8945H
Ryzen 9 3900
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 8945H
Performance Per Dollar Ryzen 9 3900
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 9 8945H | Ryzen 9 3900 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($150) |
| Longevity | ✨ Modern (Hawk Point-HS (Zen 4) (2023−2024) / 4 nm) | ✨ Modern (Matisse (Zen 2) (2019−2020) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Ryzen 9 8945H | Ryzen 9 3900 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($150) |
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 8945H and Ryzen 9 3900
Ryzen 9 8945H
The Ryzen 9 8945H is manufactured by AMD. It was released in 6 December 2023 (1 year ago). It is based on the Hawk Point-HS (Zen 4) (2023−2024) architecture. It features 8 cores and 16 threads. Base frequency is 4 GHz, with boost up to 5.2 GHz. L3 cache: 16 MB. L2 cache: 8 MB. Built on 4 nm process technology. Socket: FP7/FP7r2/FP8. Thermal design power (TDP): 8 MB + 16 MB. Memory support: DDR5. Passmark benchmark score: 30,240 points. Launch price was $499.
Ryzen 9 3900
The Ryzen 9 3900 is manufactured by AMD. It was released in 24 September 2019 (6 years ago). It is based on the Matisse (Zen 2) (2019−2020) architecture. It features 12 cores and 24 threads. Base frequency is 3.1 GHz, with boost up to 4.3 GHz. L3 cache: 64 MB. L2 cache: 512 kB (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 65 Watt. Memory support: DDR4-3200. Passmark benchmark score: 30,588 points. Launch price was $499.
Processing Power
The Ryzen 9 8945H packs 8 cores / 16 threads, while the Ryzen 9 3900 offers 12 cores / 24 threads — the Ryzen 9 3900 has 4 more cores. Boost clocks reach 5.2 GHz on the Ryzen 9 8945H versus 4.3 GHz on the Ryzen 9 3900 — a 18.9% clock advantage for the Ryzen 9 8945H (base: 4 GHz vs 3.1 GHz). The Ryzen 9 8945H uses the Hawk Point-HS (Zen 4) (2023−2024) architecture (4 nm), while the Ryzen 9 3900 uses Matisse (Zen 2) (2019−2020) (7 nm, 12 nm). In PassMark, the Ryzen 9 8945H scores 30,240 against the Ryzen 9 3900's 30,588 — a 1.1% lead for the Ryzen 9 3900. Cinebench R23 multi-core: 17,500 vs 17,700 (1.1% advantage for the Ryzen 9 3900). Geekbench 6 single-core — the metric most relevant to gaming — records 2,617 vs 1,713, a 41.8% lead for the Ryzen 9 8945H that directly translates to higher frame rates. Multi-core Geekbench: 12,662 vs 10,983 (14.2% advantage for the Ryzen 9 8945H). L3 cache: 16 MB on the Ryzen 9 8945H vs 64 MB on the Ryzen 9 3900.
| Feature | Ryzen 9 8945H | Ryzen 9 3900 |
|---|---|---|
| Cores / Threads | 8 / 16 | 12 / 24+50% |
| Boost Clock | 5.2 GHz+21% | 4.3 GHz |
| Base Clock | 4 GHz+29% | 3.1 GHz |
| L3 Cache | 16 MB | 64 MB+300% |
| L2 Cache | 8 MB+1500% | 512 kB (per core) |
| Process | 4 nm-43% | 7 nm, 12 nm |
| Architecture | Hawk Point-HS (Zen 4) (2023−2024) | Matisse (Zen 2) (2019−2020) |
| PassMark | 30,240 | 30,588+1% |
| Cinebench R23 Multi | 17,500 | 17,700+1% |
| Geekbench 6 Single | 2,617+53% | 1,713 |
| Geekbench 6 Multi | 12,662+15% | 10,983 |
Memory & Platform
The Ryzen 9 8945H uses the FP7/FP7r2/FP8 socket (PCIe 4.0), while the Ryzen 9 3900 uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-5600 on the Ryzen 9 8945H versus DDR4-3200 on the Ryzen 9 3900 — the Ryzen 9 8945H supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 8945H supports up to 256 GB of RAM compared to 128 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 20 (Ryzen 9 8945H) vs 24 (Ryzen 9 3900) — the Ryzen 9 3900 offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: FP7,FP7r2,FP8 (Ryzen 9 8945H) and X570,B550,X470,B450 (Ryzen 9 3900).
| Feature | Ryzen 9 8945H | Ryzen 9 3900 |
|---|---|---|
| Socket | FP7/FP7r2/FP8 | AM4 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | DDR5-5600+25% | DDR4-3200 |
| Max RAM Capacity | 256 GB+100% | 128 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 20 | 24+20% |
Advanced Features
Only the Ryzen 9 3900 has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Ryzen 9 8945H supports AVX-512 instructions — important for machine learning and scientific applications. Both support AMD-V virtualization. The Ryzen 9 8945H includes integrated graphics (Radeon 780M), while the Ryzen 9 3900 requires a dedicated GPU. Primary use case: Ryzen 9 8945H targets Gaming, Ryzen 9 3900 targets Workstation Desktop (low power). Direct competitor: Ryzen 9 8945H rivals Core i9-13900H; Ryzen 9 3900 rivals Core i9-9900.
| Feature | Ryzen 9 8945H | Ryzen 9 3900 |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | Radeon 780M | — |
| Unlocked | No | Yes |
| AVX-512 | Yes | No |
| Virtualization | AMD-V | AMD-V |
| Target Use | Gaming | Workstation Desktop (low power) |
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