Ryzen 9 7950X3D vs Core i5-8400
Ryzen 9 7950X3D
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 9 7950X3D
Performance Per Dollar Core i5-8400
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 9 7950X3D | Core i5-8400 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($486) | ✅ More affordable ($95) |
| Longevity | ✨ Modern (Raphael (Zen4) (2022−2023) / 5 nm, 6 nm) | ✨ Modern (Coffee Lake-S (2017−2018) / 14 nm) |
💎 Value Proposition
| Insight | Ryzen 9 7950X3D | Core i5-8400 |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+32%) | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($486) | ✅ 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 9 7950X3D and Core i5-8400
Ryzen 9 7950X3D
The Ryzen 9 7950X3D 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 16 cores and 32 threads. Base frequency is 4.2 GHz, with boost up to 5.7 GHz. L3 cache: 128 MB (total). L2 cache: 1 MB (per core). Built on 5 nm, 6 nm process technology. Socket: AM5. Thermal design power (TDP): 120 Watt. Memory support: DDR5-5200. Passmark benchmark score: 62,323 points. Launch price was $699.
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 9 7950X3D packs 16 cores / 32 threads, while the Core i5-8400 offers 6 cores / 6 threads — the Ryzen 9 7950X3D has 10 more cores. Boost clocks reach 5.7 GHz on the Ryzen 9 7950X3D versus 4 GHz on the Core i5-8400 — a 35.1% clock advantage for the Ryzen 9 7950X3D (base: 4.2 GHz vs 2.8 GHz). The Ryzen 9 7950X3D uses the Raphael (Zen4) (2022−2023) architecture (5 nm, 6 nm), while the Core i5-8400 uses Coffee Lake-S (2017−2018) (14 nm). In PassMark, the Ryzen 9 7950X3D scores 62,323 against the Core i5-8400's 9,229 — a 148.4% lead for the Ryzen 9 7950X3D. L3 cache: 128 MB (total) on the Ryzen 9 7950X3D vs 9 MB (total) on the Core i5-8400.
| Feature | Ryzen 9 7950X3D | Core i5-8400 |
|---|---|---|
| Cores / Threads | 16 / 32+167% | 6 / 6 |
| Boost Clock | 5.7 GHz+43% | 4 GHz |
| Base Clock | 4.2 GHz+50% | 2.8 GHz |
| L3 Cache | 128 MB (total)+1322% | 9 MB (total) |
| L2 Cache | 1 MB (per core)+300% | 256K (per core) |
| Process | 5 nm, 6 nm-64% | 14 nm |
| Architecture | Raphael (Zen4) (2022−2023) | Coffee Lake-S (2017−2018) |
| PassMark | 62,323+575% | 9,229 |
| Cinebench R23 Multi | 38,581 | — |
| Geekbench 6 Single | 2,926 | — |
| Geekbench 6 Multi | 19,643 | — |
Memory & Platform
The Ryzen 9 7950X3D uses the AM5 socket (PCIe 5.0), while the Core i5-8400 uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-5200 on the Ryzen 9 7950X3D versus DDR4-2666 on the Core i5-8400 — the Ryzen 9 7950X3D supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 28 (Ryzen 9 7950X3D) vs 16 (Core i5-8400) — the Ryzen 9 7950X3D offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD X670E,AMD X670,AMD B650E,AMD B650 (Ryzen 9 7950X3D) and Intel 300 series (Core i5-8400).
| Feature | Ryzen 9 7950X3D | Core i5-8400 |
|---|---|---|
| Socket | AM5 | LGA1151 |
| PCIe Generation | PCIe 5.0+67% | PCIe 3.0 |
| Max RAM Speed | DDR5-5200+25% | DDR4-2666 |
| Max RAM Capacity | 128 GB | 128 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 28+75% | 16 |
Advanced Features
Only the Ryzen 9 7950X3D has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Ryzen 9 7950X3D supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: true (Ryzen 9 7950X3D) vs VT-x, VT-d (Core i5-8400). Both include integrated graphics — Radeon Graphics (Ryzen 9 7950X3D) and UHD Graphics 630 (Core i5-8400) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i5-8400 targets Desktop. Direct competitor: Ryzen 9 7950X3D rivals Core i9-13900K.
| Feature | Ryzen 9 7950X3D | Core i5-8400 |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Radeon Graphics | UHD Graphics 630 |
| Unlocked | Yes | No |
| AVX-512 | Yes | No |
| Virtualization | true | VT-x, VT-d |
| Target Use | — | Desktop |
Value Analysis
The Ryzen 9 7950X3D launched at $699 MSRP, while the Core i5-8400 debuted at $182. At current prices ($486 vs $95), the Core i5-8400 is $391 cheaper. In terms of value (PassMark points per dollar), the Ryzen 9 7950X3D delivers 128.2 pts/$ vs 97.1 pts/$ for the Core i5-8400 — making the Ryzen 9 7950X3D the 27.6% better value option.
| Feature | Ryzen 9 7950X3D | Core i5-8400 |
|---|---|---|
| MSRP | $699 | $182-74% |
| Avg Price (30d) | $486 | $95-80% |
| Performance per Dollar | 128.2+32% | 97.1 |
| Release Date | 2023 | 2017 |
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