Ryzen 5 8640U vs Core i9-9820X
Ryzen 5 8640U
Core i9-9820X
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 Core i9-9820X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 5 8640U | Core i9-9820X |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($280) |
| Longevity | ✨ Modern (Hawk Point-U (Zen 4) (2023−2025) / 4 nm) | ✨ Modern (Skylake (server) (2017−2018) / 14 nm) |
💎 Value Proposition
| Insight | Ryzen 5 8640U | Core i9-9820X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($280) |
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 Core i9-9820X
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.
Core i9-9820X
The Core i9-9820X is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Skylake (server) (2017−2018) architecture. It features 10 cores and 20 threads. Base frequency is 3.3 GHz, with boost up to 4.2 GHz. L3 cache: 16.5 MB (total). L2 cache: 1 MB (per core). Built on 14 nm process technology. Socket: LGA2066. Thermal design power (TDP): 165 Watt. Memory support: DDR4-2666. Passmark benchmark score: 20,456 points. Launch price was $898.
Processing Power
The Ryzen 5 8640U packs 6 cores / 12 threads, while the Core i9-9820X offers 10 cores / 20 threads — the Core i9-9820X has 4 more cores. Boost clocks reach 4.9 GHz on the Ryzen 5 8640U versus 4.2 GHz on the Core i9-9820X — a 15.4% clock advantage for the Ryzen 5 8640U (base: 3.5 GHz vs 3.3 GHz). The Ryzen 5 8640U uses the Hawk Point-U (Zen 4) (2023−2025) architecture (4 nm), while the Core i9-9820X uses Skylake (server) (2017−2018) (14 nm). In PassMark, the Ryzen 5 8640U scores 20,274 against the Core i9-9820X's 20,456 — a 0.9% lead for the Core i9-9820X. Geekbench 6 single-core — the metric most relevant to gaming — records 2,519 vs 1,394, a 57.5% lead for the Ryzen 5 8640U that directly translates to higher frame rates. Multi-core Geekbench: 10,308 vs 9,361 (9.6% advantage for the Ryzen 5 8640U). L3 cache: 16 MB (total) on the Ryzen 5 8640U vs 16.5 MB (total) on the Core i9-9820X.
| Feature | Ryzen 5 8640U | Core i9-9820X |
|---|---|---|
| Cores / Threads | 6 / 12 | 10 / 20+67% |
| Boost Clock | 4.9 GHz+17% | 4.2 GHz |
| Base Clock | 3.5 GHz+6% | 3.3 GHz |
| L3 Cache | 16 MB (total) | 16.5 MB (total)+3% |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 4 nm-71% | 14 nm |
| Architecture | Hawk Point-U (Zen 4) (2023−2025) | Skylake (server) (2017−2018) |
| PassMark | 20,274 | 20,456 |
| Cinebench R23 Multi | 10,675 | — |
| Geekbench 6 Single | 2,519+81% | 1,394 |
| Geekbench 6 Multi | 10,308+10% | 9,361 |
Memory & Platform
The Ryzen 5 8640U uses the FP8 socket (PCIe 4.0), while the Core i9-9820X uses LGA2066 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches LPDDR5x-7500 on the Ryzen 5 8640U versus DDR4 2666 MHz on the Core i9-9820X — the Core i9-9820X supports 200% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 5 8640U supports up to 256 GB of RAM compared to 128 GB — 66.7% more capacity for professional workloads. Memory channels: 2 (Ryzen 5 8640U) vs 4 (Core i9-9820X). PCIe lanes: 20 (Ryzen 5 8640U) vs 44 (Core i9-9820X) — the Core i9-9820X offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SoC (Ryzen 5 8640U) and Intel X299 (Core i9-9820X).
| Feature | Ryzen 5 8640U | Core i9-9820X |
|---|---|---|
| Socket | FP8 | LGA2066 |
| PCIe Generation | PCIe 4.0+33% | PCIe 3.0 |
| Max RAM Speed | LPDDR5x-7500+25% | DDR4 2666 MHz |
| Max RAM Capacity | 256 GB+100% | 128 GB |
| RAM Channels | 2 | 4+100% |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 20 | 44+120% |
Advanced Features
Only the Core i9-9820X 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 true (Core i9-9820X). The Ryzen 5 8640U includes integrated graphics (Radeon 760M), while the Core i9-9820X requires a dedicated GPU. Primary use case: Ryzen 5 8640U targets Productivity, Core i9-9820X targets Workstation. Direct competitor: Ryzen 5 8640U rivals Core i5-1335U.
| Feature | Ryzen 5 8640U | Core i9-9820X |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | Radeon 760M | — |
| Unlocked | No | Yes |
| AVX-512 | Yes | Yes |
| Virtualization | AMD-V (SVM) | true |
| Target Use | Productivity | Workstation |
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