Core i9-10900K vs Core i9-10900X
Core i9-10900K
Core i9-10900X
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 i9-10900K
Performance Per Dollar Core i9-10900X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i9-10900K | Core i9-10900X |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($500) | ✅ More affordable ($425) |
| Longevity | ✨ Modern (Comet Lake (2020−2025) / 14 nm) | ✨ Modern (Cascade Lake-X (2019) / 14 nm) |
💎 Value Proposition
| Insight | Core i9-10900K | Core i9-10900X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+18%) |
| Upfront Cost | ⚠️ Higher cost ($500) | ✅ More affordable ($425) |
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 i9-10900K and Core i9-10900X
Core i9-10900K
The Core i9-10900K 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 10 cores and 20 threads. Base frequency is 3.7 GHz, with boost up to 5.2 GHz. L3 cache: 20 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 125 Watt. Memory support: DDR4. Passmark benchmark score: 22,382 points. Launch price was $488.
Core i9-10900X
The Core i9-10900X is manufactured by Intel. It was released in 19 October 2019 (6 years ago). It is based on the Cascade Lake-X (2019) architecture. It features 10 cores and 20 threads. Base frequency is 3.7 GHz, with boost up to 4.7 GHz. L3 cache: 19.25 MB (total). L2 cache: 1 MB (per core). Built on 14 nm process technology. Socket: LGA2066. Thermal design power (TDP): 165 Watt. Memory support: DDR4-2933. Passmark benchmark score: 22,377 points. Launch price was $299.
Processing Power
Both the Core i9-10900K and Core i9-10900X share an identical 10-core/20-thread configuration. Boost clocks reach 5.2 GHz on the Core i9-10900K versus 4.7 GHz on the Core i9-10900X — a 10.1% clock advantage for the Core i9-10900K (base: 3.7 GHz vs 3.7 GHz). The Core i9-10900K uses the Comet Lake (2020−2025) architecture (14 nm), while the Core i9-10900X uses Cascade Lake-X (2019) (14 nm). In PassMark, the Core i9-10900K scores 22,382 against the Core i9-10900X's 22,377 — a 0% lead for the Core i9-10900K. L3 cache: 20 MB (total) on the Core i9-10900K vs 19.25 MB (total) on the Core i9-10900X.
| Feature | Core i9-10900K | Core i9-10900X |
|---|---|---|
| Cores / Threads | 10 / 20 | 10 / 20 |
| Boost Clock | 5.2 GHz+11% | 4.7 GHz |
| Base Clock | 3.7 GHz | 3.7 GHz |
| L3 Cache | 20 MB (total)+4% | 19.25 MB (total) |
| L2 Cache | 256 kB (per core) | 1 MB (per core)+300% |
| Process | 14 nm | 14 nm |
| Architecture | Comet Lake (2020−2025) | Cascade Lake-X (2019) |
| PassMark | 22,382 | 22,377 |
Memory & Platform
The Core i9-10900K uses the LGA1200 socket (PCIe 3.0), while the Core i9-10900X uses LGA2066 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Core i9-10900K | Core i9-10900X |
|---|---|---|
| Socket | LGA1200 | LGA2066 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | DDR4-2933 | — |
| Max RAM Capacity | 128 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 16 | — |
Advanced Features
Virtualization: VT-x, VT-d (Core i9-10900K) / not specified (Core i9-10900X). The Core i9-10900K includes integrated graphics (UHD Graphics 630), while the Core i9-10900X requires a dedicated GPU. Primary use case: Core i9-10900K targets Desktop.
| Feature | Core i9-10900K | Core i9-10900X |
|---|---|---|
| Integrated GPU | Yes | — |
| IGPU Model | UHD Graphics 630 | — |
| Unlocked | Yes | — |
| AVX-512 | No | — |
| Virtualization | VT-x, VT-d | — |
| Target Use | Desktop | — |
Value Analysis
The Core i9-10900K launched at $499 MSRP, while the Core i9-10900X debuted at $590. At current prices ($500 vs $425), the Core i9-10900X is $75 cheaper. In terms of value (PassMark points per dollar), the Core i9-10900K delivers 44.8 pts/$ vs 52.7 pts/$ for the Core i9-10900X — making the Core i9-10900X the 16.2% better value option.
| Feature | Core i9-10900K | Core i9-10900X |
|---|---|---|
| MSRP | $499-15% | $590 |
| Avg Price (30d) | $500 | $425-15% |
| Performance per Dollar | 44.8 | 52.7+18% |
| Release Date | 2020 | 2019 |
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