Ryzen 7 5800X vs Core i5-8400
Ryzen 7 5800X
Core i5-8400
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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 5800X
Performance Per Dollar Core i5-8400
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 7 5800X | Core i5-8400 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($180) | ✅ More affordable ($95) |
| Longevity | ✨ Modern (Vermeer (Zen 3) (2020−2022) / 7 nm, 12 nm) | ✨ Modern (Coffee Lake-S (2017−2018) / 14 nm) |
💎 Value Proposition
| Insight | Ryzen 7 5800X | Core i5-8400 |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+58%) | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($180) | ✅ More affordable ($95) |
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 5800X and Core i5-8400
Ryzen 7 5800X
The Ryzen 7 5800X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen 3) (2020−2022) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 4.7 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. Passmark benchmark score: 27,712 points. Launch price was $449.
Core i5-8400
The Core i5-8400 is manufactured by Intel. It was released in 5 October 2017 (8 years ago). It is based on the Coffee Lake-S (2017−2018) architecture. It features 6 cores and 6 threads. Base frequency is 2.8 GHz, with boost up to 4 GHz. L3 cache: 9 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 65 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 9,229 points. Launch price was $182.
Processing Power
The Ryzen 7 5800X packs 8 cores / 16 threads, while the Core i5-8400 offers 6 cores / 6 threads — the Ryzen 7 5800X has 2 more cores. Boost clocks reach 4.7 GHz on the Ryzen 7 5800X versus 4 GHz on the Core i5-8400 — a 16.1% clock advantage for the Ryzen 7 5800X (base: 3.8 GHz vs 2.8 GHz). The Ryzen 7 5800X uses the Vermeer (Zen 3) (2020−2022) architecture (7 nm, 12 nm), while the Core i5-8400 uses Coffee Lake-S (2017−2018) (14 nm). In PassMark, the Ryzen 7 5800X scores 27,712 against the Core i5-8400's 9,229 — a 100.1% lead for the Ryzen 7 5800X. L3 cache: 32 MB on the Ryzen 7 5800X vs 9 MB (total) on the Core i5-8400.
| Feature | Ryzen 7 5800X | Core i5-8400 |
|---|---|---|
| Cores / Threads | 8 / 16+33% | 6 / 6 |
| Boost Clock | 4.7 GHz+18% | 4 GHz |
| Base Clock | 3.8 GHz+36% | 2.8 GHz |
| L3 Cache | 32 MB+256% | 9 MB (total) |
| L2 Cache | 512K (per core)+100% | 256K (per core) |
| Process | 7 nm, 12 nm-50% | 14 nm |
| Architecture | Vermeer (Zen 3) (2020−2022) | Coffee Lake-S (2017−2018) |
| PassMark | 27,712+200% | 9,229 |
Memory & Platform
The Ryzen 7 5800X uses the AM4 socket (PCIe 4.0), while the Core i5-8400 uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Both support up to DDR4-3200 memory speed. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 24 (Ryzen 7 5800X) vs 16 (Core i5-8400) — the Ryzen 7 5800X offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 7 5800X) and Intel 300 series (Core i5-8400).
| Feature | Ryzen 7 5800X | Core i5-8400 |
|---|---|---|
| Socket | AM4 | LGA1151 |
| PCIe Generation | PCIe 4.0+33% | PCIe 3.0 |
| Max RAM Speed | DDR4-3200 | DDR4-2666 |
| Max RAM Capacity | 128 GB | 128 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 24+50% | 16 |
Advanced Features
Only the Ryzen 7 5800X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: AMD-V (Ryzen 7 5800X) vs VT-x, VT-d (Core i5-8400). The Core i5-8400 includes integrated graphics (UHD Graphics 630), while the Ryzen 7 5800X requires a dedicated GPU. Primary use case: Ryzen 7 5800X targets Desktop, Core i5-8400 targets Desktop.
| Feature | Ryzen 7 5800X | Core i5-8400 |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | UHD Graphics 630 |
| Unlocked | Yes | No |
| AVX-512 | No | No |
| Virtualization | AMD-V | VT-x, VT-d |
| Target Use | Desktop | Desktop |
Value Analysis
The Ryzen 7 5800X launched at $449 MSRP, while the Core i5-8400 debuted at $182. At current prices ($180 vs $95), the Core i5-8400 is $85 cheaper. In terms of value (PassMark points per dollar), the Ryzen 7 5800X delivers 154.0 pts/$ vs 97.1 pts/$ for the Core i5-8400 — making the Ryzen 7 5800X the 45.2% better value option.
| Feature | Ryzen 7 5800X | Core i5-8400 |
|---|---|---|
| MSRP | $449 | $182-59% |
| Avg Price (30d) | $180 | $95-47% |
| Performance per Dollar | 154.0+59% | 97.1 |
| Release Date | 2020 | 2017 |
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