Core i9-11900KF vs Ryzen 5 8400F
Core i9-11900KF
Ryzen 5 8400F
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 Core i9-11900KF
Performance Per Dollar Ryzen 5 8400F
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i9-11900KF | Ryzen 5 8400F |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($349) | ✅ More affordable ($55) |
| Longevity | ✨ Modern (Rocket Lake (2021) / 14 nm) | ✨ Modern (Phoenix (2023−2024) / 4 nm) |
💎 Value Proposition
| Insight | Core i9-11900KF | Ryzen 5 8400F |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+534%) |
| Upfront Cost | ⚠️ Higher cost ($349) | ✅ More affordable ($55) |
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 Core i9-11900KF and Ryzen 5 8400F
Core i9-11900KF
The Core i9-11900KF is manufactured by Intel. It was released in 16 March 2021 (4 years ago). It is based on the Rocket Lake (2021) architecture. It features 8 cores and 16 threads. Base frequency is 3.5 GHz, with boost up to 5.2 GHz. L3 cache: 16 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 125 Watt. Memory support: DDR4-3200. Passmark benchmark score: 24,585 points. Launch price was $299.
Ryzen 5 8400F
The Ryzen 5 8400F is manufactured by AMD. It was released in 1 April 2024 (1 year ago). It is based on the Phoenix (2023−2024) architecture. It features 6 cores and 12 threads. Base frequency is 4.2 GHz, with boost up to 4.7 GHz. L3 cache: 16 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: AM5. Thermal design power (TDP): 65 Watt. Memory support: DDR5. Passmark benchmark score: 24,554 points. Launch price was $170.
Processing Power
The Core i9-11900KF packs 8 cores / 16 threads, while the Ryzen 5 8400F offers 6 cores / 12 threads — the Core i9-11900KF has 2 more cores. Boost clocks reach 5.2 GHz on the Core i9-11900KF versus 4.7 GHz on the Ryzen 5 8400F — a 10.1% clock advantage for the Core i9-11900KF (base: 3.5 GHz vs 4.2 GHz). The Core i9-11900KF uses the Rocket Lake (2021) architecture (14 nm), while the Ryzen 5 8400F uses Phoenix (2023−2024) (4 nm). In PassMark, the Core i9-11900KF scores 24,585 against the Ryzen 5 8400F's 24,554 — a 0.1% lead for the Core i9-11900KF. Both processors carry 16 MB (total) of L3 cache.
| Feature | Core i9-11900KF | Ryzen 5 8400F |
|---|---|---|
| Cores / Threads | 8 / 16+33% | 6 / 12 |
| Boost Clock | 5.2 GHz+11% | 4.7 GHz |
| Base Clock | 3.5 GHz | 4.2 GHz+20% |
| L3 Cache | 16 MB (total) | 16 MB (total) |
| L2 Cache | 256K (per core) | 1 MB (per core)+300% |
| Process | 14 nm | 4 nm-71% |
| Architecture | Rocket Lake (2021) | Phoenix (2023−2024) |
| PassMark | 24,585 | 24,554 |
| Cinebench R23 Multi | 15,500 | — |
Memory & Platform
The Core i9-11900KF uses the LGA1200 socket (PCIe 4.0), while the Ryzen 5 8400F uses AM5 (PCIe 4.0) — making them incompatible on the same motherboard.
| Feature | Core i9-11900KF | Ryzen 5 8400F |
|---|---|---|
| Socket | LGA1200 | AM5 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | DDR4-3200 | — |
| Max RAM Capacity | 128 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 20 | — |
Advanced Features
Virtualization: VT-x, VT-d (Core i9-11900KF) / not specified (Ryzen 5 8400F).
| Feature | Core i9-11900KF | Ryzen 5 8400F |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | Yes | — |
| AVX-512 | Yes | — |
| Virtualization | VT-x, VT-d | — |
Value Analysis
The Core i9-11900KF launched at $513 MSRP, while the Ryzen 5 8400F debuted at $303. At current prices ($349 vs $55), the Ryzen 5 8400F is $294 cheaper. In terms of value (PassMark points per dollar), the Core i9-11900KF delivers 70.4 pts/$ vs 446.4 pts/$ for the Ryzen 5 8400F — making the Ryzen 5 8400F the 145.5% better value option.
| Feature | Core i9-11900KF | Ryzen 5 8400F |
|---|---|---|
| MSRP | $513 | $303-41% |
| Avg Price (30d) | $349 | $55-84% |
| Performance per Dollar | 70.4 | 446.4+534% |
| Release Date | 2021 | 2024 |
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