CPU
GPU
Core i9-11900KB
Ryzen 9 5900X
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 Ryzen 9 5900X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i9-11900KB | Ryzen 9 5900X |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | ✨ Modern (Tiger Lake-H (2021) / 10 nm SuperFin) | ✨ Modern (Vermeer (Zen3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Core i9-11900KB | Ryzen 9 5900X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+72%) |
| Upfront Cost | Equivalent pricing | Equivalent pricing |
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 Ryzen 9 5900X
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.
Ryzen 9 5900X
The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.
Processing Power
The Core i9-11900KB packs 8 cores / 16 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 4 more cores. Boost clocks reach 4.9 GHz on the Core i9-11900KB versus 4.8 GHz on the Ryzen 9 5900X — a 2.1% clock advantage for the Core i9-11900KB (base: 3.3 GHz vs 3.7 GHz). The Core i9-11900KB uses the Tiger Lake-H (2021) architecture (10 nm SuperFin), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Core i9-11900KB scores 22,693 against the Ryzen 9 5900X's 38,955 — a 52.8% lead for the Ryzen 9 5900X. Cinebench R23 multi-core: 12,264 vs 21,000 (52.5% advantage for the Ryzen 9 5900X). Multi-core Geekbench: 10,645 vs 11,888 (11% advantage for the Ryzen 9 5900X). L3 cache: 24 MB (total) on the Core i9-11900KB vs 64 MB on the Ryzen 9 5900X.
| Feature | Core i9-11900KB | Ryzen 9 5900X |
|---|---|---|
| Cores / Threads | 8 / 16 | 12 / 24+50% |
| Boost Clock | 4.9 GHz+2% | 4.8 GHz |
| Base Clock | 3.3 GHz | 3.7 GHz+12% |
| L3 Cache | 24 MB (total) | 64 MB+167% |
| L2 Cache | 1.25 MB (per core)+150% | 512K (per core) |
| Process | 10 nm SuperFin | 7 nm, 12 nm-30% |
| Architecture | Tiger Lake-H (2021) | Vermeer (Zen3) (2020−2022) |
| PassMark | 22,693 | 38,955+72% |
| Cinebench R23 Multi | 12,264 | 21,000+71% |
| Geekbench 6 Single | — | 2,174 |
| Geekbench 6 Multi | 10,645 | 11,888+12% |
Memory & Platform
The Core i9-11900KB uses the FCBGA1787 socket (PCIe 3.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — 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 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Mobile (Core i9-11900KB) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).
| Feature | Core i9-11900KB | Ryzen 9 5900X |
|---|---|---|
| Socket | FCBGA1787 | AM4 |
| PCIe Generation | PCIe 3.0 | PCIe 4.0+33% |
| Max RAM Speed | DDR4-3200 | DDR4-3200 |
| Max RAM Capacity | 128 GB | 128 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 20 | 24+20% |
Advanced Features
Both processors feature an unlocked multiplier for overclocking. Only the Core i9-11900KB supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: VT-x, VT-d (Core i9-11900KB) vs AMD-V (Ryzen 9 5900X). The Core i9-11900KB includes integrated graphics (Intel UHD Graphics), while the Ryzen 9 5900X requires a dedicated GPU. Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K.
| Feature | Core i9-11900KB | Ryzen 9 5900X |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | Intel UHD Graphics | — |
| Unlocked | Yes | Yes |
| AVX-512 | Yes | No |
| Virtualization | VT-x, VT-d | AMD-V |
| Target Use | — | Workstation |
Value Analysis
The Core i9-11900KB launched at $539 MSRP, while the Ryzen 9 5900X debuted at $549. At current prices ($350 vs $350), the Ryzen 9 5900X is $0 cheaper. In terms of value (PassMark points per dollar), the Core i9-11900KB delivers 64.8 pts/$ vs 111.3 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 52.8% better value option.
| Feature | Core i9-11900KB | Ryzen 9 5900X |
|---|---|---|
| MSRP | $539-2% | $549 |
| Avg Price (30d) | $350 | $350 |
| Performance per Dollar | 64.8 | 111.3+72% |
| Release Date | 2021 | 2020 |
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