Ryzen 5 PRO 7645 vs Ryzen 7 7840H
Ryzen 5 PRO 7645
Ryzen 7 7840H
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 5 PRO 7645
Performance Per Dollar
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 5 PRO 7645 | Ryzen 7 7840H |
|---|---|---|
| Gaming | Balanced gaming performance | Balanced gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($192) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Raphael (2023−2025) / 5 nm) | ✨ Modern (Phoenix (2023−2024) / 4 nm) |
💎 Value Proposition
| Insight | Ryzen 5 PRO 7645 | Ryzen 7 7840H |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($192) | ✅ 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 5 PRO 7645 and Ryzen 7 7840H
Ryzen 5 PRO 7645
The Ryzen 5 PRO 7645 is manufactured by AMD. It was released in 13 June 2023 (2 years ago). It is based on the Raphael (2023−2025) architecture. It features 6 cores and 12 threads. Base frequency is 3.8 GHz, with boost up to 5.1 GHz. L3 cache: 32 MB (total). L2 cache: 1 MB (per core). Built on 5 nm process technology. Socket: AM5. Thermal design power (TDP): 65 Watt. Memory support: DDR5. Passmark benchmark score: 27,565 points. Launch price was $299.
Ryzen 7 7840H
The Ryzen 7 7840H is manufactured by AMD. It was released in Janeiro 2023 (2 years ago). It is based on the Phoenix (2023−2024) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 5.1 GHz. L3 cache: 16 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: FP8. Thermal design power (TDP): 35 Watt. Memory support: DDR5-5600. Passmark benchmark score: 27,832 points. Launch price was $299.
Processing Power
The Ryzen 5 PRO 7645 packs 6 cores / 12 threads, while the Ryzen 7 7840H offers 8 cores / 16 threads — the Ryzen 7 7840H has 2 more cores. Boost clocks reach 5.1 GHz on the Ryzen 5 PRO 7645 versus 5.1 GHz on the Ryzen 7 7840H — identical boost frequencies (base: 3.8 GHz vs 3.8 GHz). The Ryzen 5 PRO 7645 uses the Raphael (2023−2025) architecture (5 nm), while the Ryzen 7 7840H uses Phoenix (2023−2024) (4 nm). In PassMark, the Ryzen 5 PRO 7645 scores 27,565 against the Ryzen 7 7840H's 27,832 — a 1% lead for the Ryzen 7 7840H. L3 cache: 32 MB (total) on the Ryzen 5 PRO 7645 vs 16 MB (total) on the Ryzen 7 7840H.
| Feature | Ryzen 5 PRO 7645 | Ryzen 7 7840H |
|---|---|---|
| Cores / Threads | 6 / 12 | 8 / 16+33% |
| Boost Clock | 5.1 GHz | 5.1 GHz |
| Base Clock | 3.8 GHz | 3.8 GHz |
| L3 Cache | 32 MB (total)+100% | 16 MB (total) |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 5 nm | 4 nm-20% |
| Architecture | Raphael (2023−2025) | Phoenix (2023−2024) |
| PassMark | 27,565 | 27,832 |
Memory & Platform
The Ryzen 5 PRO 7645 uses the AM5 socket (PCIe 4.0), while the Ryzen 7 7840H uses FP8 (PCIe 4.0) — making them incompatible on the same motherboard.
| Feature | Ryzen 5 PRO 7645 | Ryzen 7 7840H |
|---|---|---|
| Socket | AM5 | FP8 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
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