Core i9-9940X vs Xeon W-2191B
Core i9-9940X
Xeon W-2191B
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 W-2191B
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i9-9940X | Xeon W-2191B |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($850) | ✅ More affordable ($39) |
| Longevity | ✨ Modern (Skylake (server) (2017−2018) / 14 nm) | ✨ Modern (Skylake (server) (2017−2018) / 14 nm) |
💎 Value Proposition
| Insight | Core i9-9940X | Xeon W-2191B |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+2101%) |
| Upfront Cost | ⚠️ Higher cost ($850) | ✅ More affordable ($39) |
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 W-2191B
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 W-2191B
The Xeon W-2191B is manufactured by Intel. It was released in 2015-01-01. It is based on the Skylake (server) (2017−2018) architecture. It features 18 cores and 36 threads. Base frequency is 2.3 GHz, with boost up to 4.3 GHz. L3 cache: 24.75 MB (total). L2 cache: 1 MB (per core). Built on 14 nm process technology. Socket: LGA2066. Thermal design power (TDP): 140 Watt. Memory support: DDR4-2666. Passmark benchmark score: 28,362 points. Launch price was $800.
Processing Power
The Core i9-9940X packs 14 cores / 28 threads, while the Xeon W-2191B offers 18 cores / 36 threads — the Xeon W-2191B has 4 more cores. Boost clocks reach 4.5 GHz on the Core i9-9940X versus 4.3 GHz on the Xeon W-2191B — a 4.5% clock advantage for the Core i9-9940X (base: 3.3 GHz vs 2.3 GHz). Both are built on the Skylake (server) (2017−2018) architecture using a 14 nm process. In PassMark, the Core i9-9940X scores 28,088 against the Xeon W-2191B's 28,362 — a 1% lead for the Xeon W-2191B. L3 cache: 19.25 MB (total) on the Core i9-9940X vs 24.75 MB (total) on the Xeon W-2191B.
| Feature | Core i9-9940X | Xeon W-2191B |
|---|---|---|
| Cores / Threads | 14 / 28 | 18 / 36+29% |
| Boost Clock | 4.5 GHz+5% | 4.3 GHz |
| Base Clock | 3.3 GHz+43% | 2.3 GHz |
| L3 Cache | 19.25 MB (total) | 24.75 MB (total)+29% |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 14 nm | 14 nm |
| Architecture | Skylake (server) (2017−2018) | Skylake (server) (2017−2018) |
| PassMark | 28,088 | 28,362 |
Memory & Platform
Both processors use the LGA2066 socket with PCIe 3.0. Both support up to DDR4-2666 memory speed. The Xeon W-2191B supports up to 512 GB of RAM compared to 128 GB — 120% more capacity for professional workloads. Both feature 4-channel memory with ECC support. PCIe lanes: 44 (Core i9-9940X) vs 48 (Xeon W-2191B) — the Xeon W-2191B offers 4 more lanes for additional GPUs or NVMe drives.
| Feature | Core i9-9940X | Xeon W-2191B |
|---|---|---|
| Socket | LGA2066 | LGA2066 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | DDR4-2666 | DDR4-2666 |
| Max RAM Capacity | 128 GB | 512 GB+300% |
| RAM Channels | 4 | 4 |
| 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, Xeon W-2191B targets Workstation.
| Feature | Core i9-9940X | Xeon W-2191B |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | Yes | No |
| AVX-512 | Yes | Yes |
| Virtualization | VT-x, VT-d | VT-x, VT-d |
| Target Use | Workstation | Workstation |
Value Analysis
The Core i9-9940X launched at $1387 MSRP, while the Xeon W-2191B debuted at $1333. At current prices ($850 vs $39), the Xeon W-2191B is $811 cheaper. In terms of value (PassMark points per dollar), the Core i9-9940X delivers 33.0 pts/$ vs 727.2 pts/$ for the Xeon W-2191B — making the Xeon W-2191B the 182.6% better value option.
| Feature | Core i9-9940X | Xeon W-2191B |
|---|---|---|
| MSRP | $1387 | $1333-4% |
| Avg Price (30d) | $850 | $39-95% |
| Performance per Dollar | 33.0 | 727.2+2104% |
| Release Date | 2018 | 2017 |
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