Ryzen 5 8640U vs Ryzen 7 7800X3D
Ryzen 5 8640U
Popular choices:
Ryzen 7 7800X3D
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
Performance Per Dollar Ryzen 7 7800X3D
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 5 8640U | Ryzen 7 7800X3D |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($384) |
| Longevity | ✨ Modern (Hawk Point-U (Zen 4) (2023−2025) / 4 nm) | ✨ Modern (Raphael (Zen4) (2022−2023) / 5 nm) |
💎 Value Proposition
| Insight | Ryzen 5 8640U | Ryzen 7 7800X3D |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($384) |
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 8640U and Ryzen 7 7800X3D
Ryzen 5 8640U
The Ryzen 5 8640U is manufactured by AMD. It was released in 6 December 2023 (1 year ago). It is based on the Hawk Point-U (Zen 4) (2023−2025) architecture. It features 6 cores and 12 threads. Base frequency is 3.5 GHz, with boost up to 4.9 GHz. L3 cache: 16 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: FP8. Thermal design power (TDP): 28 Watt. Memory support: DDR5. Passmark benchmark score: 20,274 points. Launch price was $299.
Ryzen 7 7800X3D
The Ryzen 7 7800X3D is manufactured by AMD. It was released in 4 January 2023 (2 years ago). It is based on the Raphael (Zen4) (2022−2023) architecture. It features 8 cores and 16 threads. Base frequency is 4.4 GHz, with boost up to 5 GHz. L3 cache: 96 MB (total). L2 cache: 1 MB (per core). Built on 5 nm process technology. Socket: AM5. Thermal design power (TDP): 120 Watt. Memory support: DDR5-5200. Passmark benchmark score: 34,293 points. Launch price was $449.
Processing Power
The Ryzen 5 8640U packs 6 cores / 12 threads, while the Ryzen 7 7800X3D offers 8 cores / 16 threads — the Ryzen 7 7800X3D has 2 more cores. Boost clocks reach 4.9 GHz on the Ryzen 5 8640U versus 5 GHz on the Ryzen 7 7800X3D — a 2% clock advantage for the Ryzen 7 7800X3D (base: 3.5 GHz vs 4.4 GHz). The Ryzen 5 8640U uses the Hawk Point-U (Zen 4) (2023−2025) architecture (4 nm), while the Ryzen 7 7800X3D uses Raphael (Zen4) (2022−2023) (5 nm). In PassMark, the Ryzen 5 8640U scores 20,274 against the Ryzen 7 7800X3D's 34,293 — a 51.4% lead for the Ryzen 7 7800X3D. Cinebench R23 multi-core: 10,675 vs 18,500 (53.6% advantage for the Ryzen 7 7800X3D). Geekbench 6 single-core — the metric most relevant to gaming — records 2,519 vs 2,700, a 6.9% lead for the Ryzen 7 7800X3D that directly translates to higher frame rates. Multi-core Geekbench: 10,308 vs 15,000 (37.1% advantage for the Ryzen 7 7800X3D). L3 cache: 16 MB (total) on the Ryzen 5 8640U vs 96 MB (total) on the Ryzen 7 7800X3D.
| Feature | Ryzen 5 8640U | Ryzen 7 7800X3D |
|---|---|---|
| Cores / Threads | 6 / 12 | 8 / 16+33% |
| Boost Clock | 4.9 GHz | 5 GHz+2% |
| Base Clock | 3.5 GHz | 4.4 GHz+26% |
| L3 Cache | 16 MB (total) | 96 MB (total)+500% |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 4 nm-20% | 5 nm |
| Architecture | Hawk Point-U (Zen 4) (2023−2025) | Raphael (Zen4) (2022−2023) |
| PassMark | 20,274 | 34,293+69% |
| Cinebench R23 Multi | 10,675 | 18,500+73% |
| Geekbench 6 Single | 2,519 | 2,700+7% |
| Geekbench 6 Multi | 10,308 | 15,000+46% |
Memory & Platform
The Ryzen 5 8640U uses the FP8 socket (PCIe 4.0), while the Ryzen 7 7800X3D uses AM5 (PCIe 5.0) — making them incompatible on the same motherboard. Both support up to LPDDR5x-7500 memory speed. The Ryzen 5 8640U 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 5 8640U) vs 28 (Ryzen 7 7800X3D) — the Ryzen 7 7800X3D offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SoC (Ryzen 5 8640U) and X670E,X670,B650E,B650,A620 (Ryzen 7 7800X3D).
| Feature | Ryzen 5 8640U | Ryzen 7 7800X3D |
|---|---|---|
| Socket | FP8 | AM5 |
| PCIe Generation | PCIe 4.0 | PCIe 5.0+25% |
| Max RAM Speed | LPDDR5x-7500 | DDR5-5200 |
| Max RAM Capacity | 256 GB+100% | 128 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 20 | 28+40% |
Advanced Features
Only the Ryzen 7 7800X3D has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Virtualization support: AMD-V (SVM) (Ryzen 5 8640U) vs AMD-V (Ryzen 7 7800X3D). Both include integrated graphics — Radeon 760M (Ryzen 5 8640U) and AMD Radeon Graphics (2-core) (Ryzen 7 7800X3D) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Ryzen 5 8640U targets Productivity, Ryzen 7 7800X3D targets Gaming. Direct competitor: Ryzen 5 8640U rivals Core i5-1335U; Ryzen 7 7800X3D rivals Intel Core i7-14700K.
| Feature | Ryzen 5 8640U | Ryzen 7 7800X3D |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Radeon 760M | AMD Radeon Graphics (2-core) |
| Unlocked | No | Yes |
| AVX-512 | Yes | Yes |
| Virtualization | AMD-V (SVM) | AMD-V |
| Target Use | Productivity | Gaming |
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