Core i9-11900KB vs Core i5-10400F
Core i9-11900KB
Core i5-10400F
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 i9-11900KB
Performance Per Dollar Core i5-10400F
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i9-11900KB | Core i5-10400F |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($350) | ✅ More affordable ($102) |
| Longevity | ✨ Modern (Tiger Lake-H (2021) / 10 nm SuperFin) | ✨ Modern (Comet Lake (2020−2025) / 14 nm) |
💎 Value Proposition
| Insight | Core i9-11900KB | Core i5-10400F |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+97%) |
| Upfront Cost | ⚠️ Higher cost ($350) | ✅ More affordable ($102) |
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 i9-11900KB and Core i5-10400F
Core i9-11900KB
The Core i9-11900KB is manufactured by Intel. It was released in Maio 2021 (4 years ago). It is based on the Tiger Lake-H (2021) architecture. It features 8 cores and 16 threads. Base frequency is 3.3 GHz, with boost up to 4.9 GHz. L3 cache: 24 MB (total). L2 cache: 1.25 MB (per core). Built on 10 nm SuperFin process technology. Socket: FCBGA1787. Thermal design power (TDP): 65 Watt. Memory support: DDR4. Passmark benchmark score: 22,693 points. Launch price was $539.
Core i5-10400F
The Core i5-10400F is manufactured by Intel. It was released in 30 April 2020 (5 years ago). It is based on the Comet Lake (2020−2025) architecture. It features 6 cores and 12 threads. Base frequency is 2.9 GHz, with boost up to 4.3 GHz. L3 cache: 12 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 65 Watt. Memory support: DDR4. Passmark benchmark score: 13,029 points. Launch price was $155.
Processing Power
The Core i9-11900KB packs 8 cores / 16 threads, while the Core i5-10400F offers 6 cores / 12 threads — the Core i9-11900KB has 2 more cores. Boost clocks reach 4.9 GHz on the Core i9-11900KB versus 4.3 GHz on the Core i5-10400F — a 13% clock advantage for the Core i9-11900KB (base: 3.3 GHz vs 2.9 GHz). The Core i9-11900KB uses the Tiger Lake-H (2021) architecture (10 nm SuperFin), while the Core i5-10400F uses Comet Lake (2020−2025) (14 nm). In PassMark, the Core i9-11900KB scores 22,693 against the Core i5-10400F's 13,029 — a 54.1% lead for the Core i9-11900KB. Cinebench R23 multi-core: 12,264 vs 8,191 (39.8% advantage for the Core i9-11900KB). Multi-core Geekbench: 10,645 vs 5,783 (59.2% advantage for the Core i9-11900KB). L3 cache: 24 MB (total) on the Core i9-11900KB vs 12 MB (total) on the Core i5-10400F.
| Feature | Core i9-11900KB | Core i5-10400F |
|---|---|---|
| Cores / Threads | 8 / 16+33% | 6 / 12 |
| Boost Clock | 4.9 GHz+14% | 4.3 GHz |
| Base Clock | 3.3 GHz+14% | 2.9 GHz |
| L3 Cache | 24 MB (total)+100% | 12 MB (total) |
| L2 Cache | 1.25 MB (per core)+400% | 256K (per core) |
| Process | 10 nm SuperFin-29% | 14 nm |
| Architecture | Tiger Lake-H (2021) | Comet Lake (2020−2025) |
| PassMark | 22,693+74% | 13,029 |
| Cinebench R23 Multi | 12,264+50% | 8,191 |
| Geekbench 6 Single | — | 1,454 |
| Geekbench 6 Multi | 10,645+84% | 5,783 |
Memory & Platform
The Core i9-11900KB uses the FCBGA1787 socket (PCIe 3.0), while the Core i5-10400F uses LGA1200 (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: 20 (Core i9-11900KB) vs 16 (Core i5-10400F) — the Core i9-11900KB offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Mobile (Core i9-11900KB) and H410,B460,H470,Z490,H510,B560,H570,Z590 (Core i5-10400F).
| Feature | Core i9-11900KB | Core i5-10400F |
|---|---|---|
| Socket | FCBGA1787 | LGA1200 |
| PCIe Generation | PCIe 3.0 | 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 | 20+25% | 16 |
Advanced Features
Only the Core i9-11900KB has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Core i9-11900KB supports AVX-512 instructions — important for machine learning and scientific applications. Both support VT-x, VT-d virtualization. The Core i9-11900KB includes integrated graphics (Intel UHD Graphics), while the Core i5-10400F requires a dedicated GPU. Primary use case: Core i5-10400F targets Gaming. Direct competitor: Core i5-10400F rivals Ryzen 5 3600.
| Feature | Core i9-11900KB | Core i5-10400F |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | Intel UHD Graphics | — |
| Unlocked | Yes | No |
| AVX-512 | Yes | No |
| Virtualization | VT-x, VT-d | VT-x, VT-d |
| Target Use | — | Gaming |
Value Analysis
The Core i9-11900KB launched at $539 MSRP, while the Core i5-10400F debuted at $160. At current prices ($350 vs $102), the Core i5-10400F is $248 cheaper. In terms of value (PassMark points per dollar), the Core i9-11900KB delivers 64.8 pts/$ vs 127.7 pts/$ for the Core i5-10400F — making the Core i5-10400F the 65.3% better value option.
| Feature | Core i9-11900KB | Core i5-10400F |
|---|---|---|
| MSRP | $539 | $160-70% |
| Avg Price (30d) | $350 | $102-71% |
| Performance per Dollar | 64.8 | 127.7+97% |
| Release Date | 2021 | 2020 |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
You May Also Compare
Similar CPU comparisons based on Core i9-11900KB and Core i5-10400F
