Core i9-9900KS vs Ryzen 5 5600X
Core i9-9900KS
Popular choices:
Ryzen 5 5600X
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 i9-9900KS
Performance Per Dollar Ryzen 5 5600X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i9-9900KS | Ryzen 5 5600X |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($350) | ✅ More affordable ($135) |
| Longevity | ✨ Modern (Coffee Lake-R (2018−2019) / 14 nm) | ✨ Modern (Vermeer (Zen 3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Core i9-9900KS | Ryzen 5 5600X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+192%) |
| Upfront Cost | ⚠️ Higher cost ($350) | ✅ More affordable ($135) |
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 i9-9900KS and Ryzen 5 5600X
Core i9-9900KS
The Core i9-9900KS is manufactured by Intel. It was released in 28 October 2019 (6 years ago). It is based on the Coffee Lake-R (2018−2019) architecture. It features 8 cores and 16 threads. Base frequency is 4 GHz, with boost up to 5 GHz. L3 cache: 16 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 127 Watt. Memory support: DDR4. Passmark benchmark score: 19,397 points. Launch price was $513.
Ryzen 5 5600X
The Ryzen 5 5600X 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 6 cores and 12 threads. Base frequency is 3.7 GHz, with boost up to 4.6 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 65 Watt. Memory support: DDR4. Passmark benchmark score: 21,845 points. Launch price was $299.
Processing Power
The Core i9-9900KS packs 8 cores / 16 threads, while the Ryzen 5 5600X offers 6 cores / 12 threads — the Core i9-9900KS has 2 more cores. Boost clocks reach 5 GHz on the Core i9-9900KS versus 4.6 GHz on the Ryzen 5 5600X — a 8.3% clock advantage for the Core i9-9900KS (base: 4 GHz vs 3.7 GHz). The Core i9-9900KS uses the Coffee Lake-R (2018−2019) architecture (14 nm), while the Ryzen 5 5600X uses Vermeer (Zen 3) (2020−2022) (7 nm, 12 nm). In PassMark, the Core i9-9900KS scores 19,397 against the Ryzen 5 5600X's 21,845 — a 11.9% lead for the Ryzen 5 5600X. L3 cache: 16 MB (total) on the Core i9-9900KS vs 32 MB on the Ryzen 5 5600X.
| Feature | Core i9-9900KS | Ryzen 5 5600X |
|---|---|---|
| Cores / Threads | 8 / 16+33% | 6 / 12 |
| Boost Clock | 5 GHz+9% | 4.6 GHz |
| Base Clock | 4 GHz+8% | 3.7 GHz |
| L3 Cache | 16 MB (total) | 32 MB+100% |
| L2 Cache | 256 kB (per core) | 512K (per core)+100% |
| Process | 14 nm | 7 nm, 12 nm-50% |
| Architecture | Coffee Lake-R (2018−2019) | Vermeer (Zen 3) (2020−2022) |
| PassMark | 19,397 | 21,845+13% |
Memory & Platform
The Core i9-9900KS uses the LGA1151 socket (PCIe 4.0), while the Ryzen 5 5600X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard.
| Feature | Core i9-9900KS | Ryzen 5 5600X |
|---|---|---|
| Socket | LGA1151 | AM4 |
| 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 | — | 24 |
Advanced Features
Virtualization: not specified (Core i9-9900KS) / AMD-V (Ryzen 5 5600X). Primary use case: Ryzen 5 5600X targets Desktop.
| Feature | Core i9-9900KS | Ryzen 5 5600X |
|---|---|---|
| Integrated GPU | — | No |
| Unlocked | — | Yes |
| AVX-512 | — | No |
| Virtualization | — | AMD-V |
| Target Use | — | Desktop |
Value Analysis
The Core i9-9900KS launched at $513 MSRP, while the Ryzen 5 5600X debuted at $299. At current prices ($350 vs $135), the Ryzen 5 5600X is $215 cheaper. In terms of value (PassMark points per dollar), the Core i9-9900KS delivers 55.4 pts/$ vs 161.8 pts/$ for the Ryzen 5 5600X — making the Ryzen 5 5600X the 98% better value option.
| Feature | Core i9-9900KS | Ryzen 5 5600X |
|---|---|---|
| MSRP | $513 | $299-42% |
| Avg Price (30d) | $350 | $135-61% |
| Performance per Dollar | 55.4 | 161.8+192% |
| Release Date | 2019 | 2020 |
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