Core i9-9900X vs EPYC 7281
Core i9-9900X
EPYC 7281
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 i9-9900X
Performance Per Dollar EPYC 7281
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i9-9900X | EPYC 7281 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($300) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Skylake (server) (2017−2018) / 14 nm) | ✨ Modern (Naples (2017−2018) / 14 nm) |
💎 Value Proposition
| Insight | Core i9-9900X | EPYC 7281 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($300) | ✅ More affordable ($0) |
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 i9-9900X and EPYC 7281
Core i9-9900X
The Core i9-9900X 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 3.5 GHz, with boost up to 4.5 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: DDR4-2666. Passmark benchmark score: 21,655 points. Launch price was $989.
EPYC 7281
The EPYC 7281 is manufactured by AMD. It was released in 29 June 2017 (8 years ago). It is based on the Naples (2017−2018) architecture. It features 16 cores and 32 threads. Base frequency is 2.1 GHz, with boost up to 2.7 GHz. L3 cache: 32 MB (total). L2 cache: 512K (per core). Built on 14 nm process technology. Socket: TR4. Thermal design power (TDP): 170 Watt. Memory support: DDR4 Eight-channel. Passmark benchmark score: 21,621 points. Launch price was $650.
Processing Power
The Core i9-9900X packs 10 cores / 20 threads, while the EPYC 7281 offers 16 cores / 32 threads — the EPYC 7281 has 6 more cores. Boost clocks reach 4.5 GHz on the Core i9-9900X versus 2.7 GHz on the EPYC 7281 — a 50% clock advantage for the Core i9-9900X (base: 3.5 GHz vs 2.1 GHz). The Core i9-9900X uses the Skylake (server) (2017−2018) architecture (14 nm), while the EPYC 7281 uses Naples (2017−2018) (14 nm). In PassMark, the Core i9-9900X scores 21,655 against the EPYC 7281's 21,621 — a 0.2% lead for the Core i9-9900X. L3 cache: 19.25 MB (total) on the Core i9-9900X vs 32 MB (total) on the EPYC 7281.
| Feature | Core i9-9900X | EPYC 7281 |
|---|---|---|
| Cores / Threads | 10 / 20 | 16 / 32+60% |
| Boost Clock | 4.5 GHz+67% | 2.7 GHz |
| Base Clock | 3.5 GHz+67% | 2.1 GHz |
| L3 Cache | 19.25 MB (total) | 32 MB (total)+66% |
| L2 Cache | 1 MB (per core)+100% | 512K (per core) |
| Process | 14 nm | 14 nm |
| Architecture | Skylake (server) (2017−2018) | Naples (2017−2018) |
| PassMark | 21,655 | 21,621 |
| Cinebench R23 Multi | 13,985 | — |
| Geekbench 6 Single | 1,459 | — |
| Geekbench 6 Multi | 9,475 | — |
Memory & Platform
The Core i9-9900X uses the LGA2066 socket (PCIe 3.0), while the EPYC 7281 uses TR4 (PCIe 4.0) — making them incompatible on the same motherboard.
| Feature | Core i9-9900X | EPYC 7281 |
|---|---|---|
| Socket | LGA2066 | TR4 |
| PCIe Generation | PCIe 3.0 | PCIe 4.0+33% |
| Max RAM Speed | DDR4-2666 | — |
| Max RAM Capacity | 128 GB | — |
| RAM Channels | 4 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 44 | — |
Advanced Features
Virtualization: VT-x, VT-d (Core i9-9900X) / not specified (EPYC 7281).
| Feature | Core i9-9900X | EPYC 7281 |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | Yes | — |
| AVX-512 | Yes | — |
| Virtualization | VT-x, VT-d | — |
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