CPU
GPU
Core i9-9940X
Xeon Platinum 8253
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 i9-9940X
Performance Per Dollar Xeon Platinum 8253
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i9-9940X | Xeon Platinum 8253 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($850) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Skylake (server) (2017−2018) / 14 nm) | ✨ Modern (Cascade Lake-SP (2018) / 14 nm) |
💎 Value Proposition
| Insight | Core i9-9940X | Xeon Platinum 8253 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($850) | ✅ 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 i9-9940X and Xeon Platinum 8253
Core i9-9940X
The Core i9-9940X 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 14 cores and 28 threads. Base frequency is 3.3 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: 28,088 points. Launch price was $1,387.
Xeon Platinum 8253
The Xeon Platinum 8253 is manufactured by Intel. It was released in 11 December 2018 (6 years ago). It is based on the Cascade Lake-SP (2018) architecture. It features 16 cores and 32 threads. Base frequency is 2.2 GHz, with boost up to 3 GHz. L3 cache: 22 MB (total). L2 cache: 1 MB (per core). Built on 14 nm process technology. Socket: LGA3647. Thermal design power (TDP): 125 Watt. Memory support: DDR4-2933. Passmark benchmark score: 28,165 points. Launch price was $3,115.
Processing Power
The Core i9-9940X packs 14 cores / 28 threads, while the Xeon Platinum 8253 offers 16 cores / 32 threads — the Xeon Platinum 8253 has 2 more cores. Boost clocks reach 4.5 GHz on the Core i9-9940X versus 3 GHz on the Xeon Platinum 8253 — a 40% clock advantage for the Core i9-9940X (base: 3.3 GHz vs 2.2 GHz). The Core i9-9940X uses the Skylake (server) (2017−2018) architecture (14 nm), while the Xeon Platinum 8253 uses Cascade Lake-SP (2018) (14 nm). In PassMark, the Core i9-9940X scores 28,088 against the Xeon Platinum 8253's 28,165 — a 0.3% lead for the Xeon Platinum 8253. L3 cache: 19.25 MB (total) on the Core i9-9940X vs 22 MB (total) on the Xeon Platinum 8253.
| Feature | Core i9-9940X | Xeon Platinum 8253 |
|---|---|---|
| Cores / Threads | 14 / 28 | 16 / 32+14% |
| Boost Clock | 4.5 GHz+50% | 3 GHz |
| Base Clock | 3.3 GHz+50% | 2.2 GHz |
| L3 Cache | 19.25 MB (total) | 22 MB (total)+14% |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 14 nm | 14 nm |
| Architecture | Skylake (server) (2017−2018) | Cascade Lake-SP (2018) |
| PassMark | 28,088 | 28,165 |
Memory & Platform
The Core i9-9940X uses the LGA2066 socket (PCIe 3.0), while the Xeon Platinum 8253 uses LGA3647 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i9-9940X versus 2933 on the Xeon Platinum 8253 — the Xeon Platinum 8253 supports 199.5% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon Platinum 8253 supports up to 1024 of RAM compared to 128 GB — 155.6% more capacity for professional workloads. Memory channels: 4 (Core i9-9940X) vs 6 (Xeon Platinum 8253). PCIe lanes: 44 (Core i9-9940X) vs 48 (Xeon Platinum 8253) — the Xeon Platinum 8253 offers 4 more lanes for additional GPUs or NVMe drives.
| Feature | Core i9-9940X | Xeon Platinum 8253 |
|---|---|---|
| Socket | LGA2066 | LGA3647 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | DDR4-2666 | 2933+73225% |
| Max RAM Capacity | 128 GB+13107100% | 1024 |
| RAM Channels | 4 | 6+50% |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 44 | 48+9% |
Advanced Features
Only the Core i9-9940X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Both support VT-x, VT-d virtualization. Primary use case: Core i9-9940X targets Workstation. Direct competitor: Xeon Platinum 8253 rivals EPYC 7402.
| Feature | Core i9-9940X | Xeon Platinum 8253 |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | — | None |
| Unlocked | Yes | No |
| AVX-512 | Yes | Yes |
| Virtualization | VT-x, VT-d | VT-x, VT-d |
| Target Use | Workstation | — |
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