Ryzen 7 3800X vs Ryzen 5 PRO 8645HS
Ryzen 7 3800X
Ryzen 5 PRO 8645HS
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 7 3800X
Performance Per Dollar Ryzen 5 PRO 8645HS
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 7 3800X | Ryzen 5 PRO 8645HS |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($140) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Matisse (2019−2020) / 7 nm, 12 nm) | ✨ Modern (Hawk Point (2024−2025) / 4 nm) |
💎 Value Proposition
| Insight | Ryzen 7 3800X | Ryzen 5 PRO 8645HS |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($140) | ✅ 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 7 3800X and Ryzen 5 PRO 8645HS
Ryzen 7 3800X
The Ryzen 7 3800X is manufactured by AMD. It was released in 7 July 2019 (6 years ago). It is based on the Matisse (2019−2020) architecture. It features 8 cores and 16 threads. Base frequency is 3.9 GHz, with boost up to 4.5 GHz. L3 cache: 32 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 Dual-channel. Passmark benchmark score: 23,008 points. Launch price was $399.
Ryzen 5 PRO 8645HS
The Ryzen 5 PRO 8645HS is manufactured by AMD. It was released in 16 April 2024 (1 year ago). It is based on the Hawk Point (2024−2025) architecture. It features 6 cores and 12 threads. Base frequency is 4.3 GHz, with boost up to 5 GHz. L3 cache: 16 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: FP7. Thermal design power (TDP): 45 Watt. Memory support: DDR5. Passmark benchmark score: 23,227 points. Launch price was $299.
Processing Power
The Ryzen 7 3800X packs 8 cores / 16 threads, while the Ryzen 5 PRO 8645HS offers 6 cores / 12 threads — the Ryzen 7 3800X has 2 more cores. Boost clocks reach 4.5 GHz on the Ryzen 7 3800X versus 5 GHz on the Ryzen 5 PRO 8645HS — a 10.5% clock advantage for the Ryzen 5 PRO 8645HS (base: 3.9 GHz vs 4.3 GHz). The Ryzen 7 3800X uses the Matisse (2019−2020) architecture (7 nm, 12 nm), while the Ryzen 5 PRO 8645HS uses Hawk Point (2024−2025) (4 nm). In PassMark, the Ryzen 7 3800X scores 23,008 against the Ryzen 5 PRO 8645HS's 23,227 — a 0.9% lead for the Ryzen 5 PRO 8645HS. L3 cache: 32 MB on the Ryzen 7 3800X vs 16 MB (total) on the Ryzen 5 PRO 8645HS.
| Feature | Ryzen 7 3800X | Ryzen 5 PRO 8645HS |
|---|---|---|
| Cores / Threads | 8 / 16+33% | 6 / 12 |
| Boost Clock | 4.5 GHz | 5 GHz+11% |
| Base Clock | 3.9 GHz | 4.3 GHz+10% |
| L3 Cache | 32 MB+100% | 16 MB (total) |
| L2 Cache | 512K (per core) | 1 MB (per core)+100% |
| Process | 7 nm, 12 nm | 4 nm-43% |
| Architecture | Matisse (2019−2020) | Hawk Point (2024−2025) |
| PassMark | 23,008 | 23,227 |
Memory & Platform
The Ryzen 7 3800X uses the AM4 socket (PCIe 4.0), while the Ryzen 5 PRO 8645HS uses FP7 (PCIe 4.0) — making them incompatible on the same motherboard.
| Feature | Ryzen 7 3800X | Ryzen 5 PRO 8645HS |
|---|---|---|
| Socket | AM4 | FP7 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | DDR4-3200 | — |
| Max RAM Capacity | 128 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ✅ | — |
| PCIe Lanes | 24 | — |
Advanced Features
Virtualization: AMD-V (Ryzen 7 3800X) / not specified (Ryzen 5 PRO 8645HS). Primary use case: Ryzen 7 3800X targets Desktop.
| Feature | Ryzen 7 3800X | Ryzen 5 PRO 8645HS |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | Yes | — |
| AVX-512 | No | — |
| Virtualization | AMD-V | — |
| Target Use | Desktop | — |
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