CPU
GPU
Core i9-9820X
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 i9-9820X
Performance Per Dollar Core i5-10400F
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i9-9820X | Core i5-10400F |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($280) | ✅ More affordable ($102) |
| Longevity | ✨ Modern (Skylake (server) (2017−2018) / 14 nm) | ✨ Modern (Comet Lake (2020−2025) / 14 nm) |
💎 Value Proposition
| Insight | Core i9-9820X | Core i5-10400F |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+75%) |
| Upfront Cost | ⚠️ Higher cost ($280) | ✅ 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 i9-9820X and Core i5-10400F
Core i9-9820X
The Core i9-9820X is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Skylake (server) (2017−2018) architecture. It features 10 cores and 20 threads. Base frequency is 3.3 GHz, with boost up to 4.2 GHz. L3 cache: 16.5 MB (total). L2 cache: 1 MB (per core). Built on 14 nm process technology. Socket: LGA2066. Thermal design power (TDP): 165 Watt. Memory support: DDR4-2666. Passmark benchmark score: 20,456 points. Launch price was $898.
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 i9-9820X packs 10 cores / 20 threads, while the Core i5-10400F offers 6 cores / 12 threads — the Core i9-9820X has 4 more cores. Boost clocks reach 4.2 GHz on the Core i9-9820X versus 4.3 GHz on the Core i5-10400F — a 2.4% clock advantage for the Core i5-10400F (base: 3.3 GHz vs 2.9 GHz). The Core i9-9820X uses the Skylake (server) (2017−2018) architecture (14 nm), while the Core i5-10400F uses Comet Lake (2020−2025) (14 nm). In PassMark, the Core i9-9820X scores 20,456 against the Core i5-10400F's 13,029 — a 44.4% lead for the Core i9-9820X. Geekbench 6 single-core — the metric most relevant to gaming — records 1,394 vs 1,454, a 4.2% lead for the Core i5-10400F that directly translates to higher frame rates. Multi-core Geekbench: 9,361 vs 5,783 (47.3% advantage for the Core i9-9820X). L3 cache: 16.5 MB (total) on the Core i9-9820X vs 12 MB (total) on the Core i5-10400F.
| Feature | Core i9-9820X | Core i5-10400F |
|---|---|---|
| Cores / Threads | 10 / 20+67% | 6 / 12 |
| Boost Clock | 4.2 GHz | 4.3 GHz+2% |
| Base Clock | 3.3 GHz+14% | 2.9 GHz |
| L3 Cache | 16.5 MB (total)+38% | 12 MB (total) |
| L2 Cache | 1 MB (per core)+300% | 256K (per core) |
| Process | 14 nm | 14 nm |
| Architecture | Skylake (server) (2017−2018) | Comet Lake (2020−2025) |
| PassMark | 20,456+57% | 13,029 |
| Cinebench R23 Multi | — | 8,191 |
| Geekbench 6 Single | 1,394 | 1,454+4% |
| Geekbench 6 Multi | 9,361+62% | 5,783 |
Memory & Platform
The Core i9-9820X uses the LGA2066 socket (PCIe 3.0), while the Core i5-10400F uses LGA1200 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4 2666 MHz on the Core i9-9820X versus DDR4-2666 on the Core i5-10400F — the Core i9-9820X supports 200% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Memory channels: 4 (Core i9-9820X) vs 2 (Core i5-10400F). PCIe lanes: 44 (Core i9-9820X) vs 16 (Core i5-10400F) — the Core i9-9820X offers 28 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel X299 (Core i9-9820X) and H410,B460,H470,Z490,H510,B560,H570,Z590 (Core i5-10400F).
| Feature | Core i9-9820X | Core i5-10400F |
|---|---|---|
| Socket | LGA2066 | LGA1200 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | DDR4 2666 MHz | DDR4-2666 |
| Max RAM Capacity | 128 GB | 128 GB |
| RAM Channels | 4+100% | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 44+175% | 16 |
Advanced Features
Only the Core i9-9820X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Core i9-9820X supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: true (Core i9-9820X) vs VT-x, VT-d (Core i5-10400F). Primary use case: Core i9-9820X targets Workstation, Core i5-10400F targets Gaming. Direct competitor: Core i5-10400F rivals Ryzen 5 3600.
| Feature | Core i9-9820X | Core i5-10400F |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | Yes | No |
| AVX-512 | Yes | No |
| Virtualization | true | VT-x, VT-d |
| Target Use | Workstation | Gaming |
Value Analysis
The Core i9-9820X launched at $889 MSRP, while the Core i5-10400F debuted at $160. At current prices ($280 vs $102), the Core i5-10400F is $178 cheaper. In terms of value (PassMark points per dollar), the Core i9-9820X delivers 73.1 pts/$ vs 127.7 pts/$ for the Core i5-10400F — making the Core i5-10400F the 54.5% better value option.
| Feature | Core i9-9820X | Core i5-10400F |
|---|---|---|
| MSRP | $889 | $160-82% |
| Avg Price (30d) | $280 | $102-64% |
| Performance per Dollar | 73.1 | 127.7+75% |
| Release Date | 2018 | 2020 |
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