CPU
GPU
Core i9-9940X
Xeon Gold 6434
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 Gold 6434
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i9-9940X | Xeon Gold 6434 |
|---|---|---|
| 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 (Sapphire Rapids (2023−2024) / Intel 7 nm) |
💎 Value Proposition
| Insight | Core i9-9940X | Xeon Gold 6434 |
|---|---|---|
| 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 Gold 6434
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 Gold 6434
The Xeon Gold 6434 is manufactured by Intel. It was released in 10 January 2023 (2 years ago). It is based on the Sapphire Rapids (2023−2024) architecture. It features 8 cores and 16 threads. Base frequency is 3.7 GHz, with boost up to 4.1 GHz. L3 cache: 22.5 MB. L2 cache: 2 MB (per core). Built on Intel 7 nm process technology. Socket: LGA4677. Thermal design power (TDP): 195 Watt. Memory support: DDR5-4800, DDR5-4400. Passmark benchmark score: 28,111 points. Launch price was $2,607.
Processing Power
The Core i9-9940X packs 14 cores / 28 threads, while the Xeon Gold 6434 offers 8 cores / 16 threads — the Core i9-9940X has 6 more cores. Boost clocks reach 4.5 GHz on the Core i9-9940X versus 4.1 GHz on the Xeon Gold 6434 — a 9.3% clock advantage for the Core i9-9940X (base: 3.3 GHz vs 3.7 GHz). The Core i9-9940X uses the Skylake (server) (2017−2018) architecture (14 nm), while the Xeon Gold 6434 uses Sapphire Rapids (2023−2024) (Intel 7 nm). In PassMark, the Core i9-9940X scores 28,088 against the Xeon Gold 6434's 28,111 — a 0.1% lead for the Xeon Gold 6434. L3 cache: 19.25 MB (total) on the Core i9-9940X vs 22.5 MB on the Xeon Gold 6434.
| Feature | Core i9-9940X | Xeon Gold 6434 |
|---|---|---|
| Cores / Threads | 14 / 28+75% | 8 / 16 |
| Boost Clock | 4.5 GHz+10% | 4.1 GHz |
| Base Clock | 3.3 GHz | 3.7 GHz+12% |
| L3 Cache | 19.25 MB (total) | 22.5 MB+17% |
| L2 Cache | 1 MB (per core) | 2 MB (per core)+100% |
| Process | 14 nm | Intel 7 nm-50% |
| Architecture | Skylake (server) (2017−2018) | Sapphire Rapids (2023−2024) |
| PassMark | 28,088 | 28,111 |
| Cinebench R23 Multi | — | 17,500 |
| Geekbench 6 Single | — | 2,098 |
| Geekbench 6 Multi | — | 12,000 |
Memory & Platform
The Core i9-9940X uses the LGA2066 socket (PCIe 3.0), while the Xeon Gold 6434 uses LGA4677 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i9-9940X versus DDR5-4800 on the Xeon Gold 6434 — the Xeon Gold 6434 supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon Gold 6434 supports up to 4096 GB of RAM compared to 128 GB — 187.9% more capacity for professional workloads. Memory channels: 4 (Core i9-9940X) vs 8 (Xeon Gold 6434). PCIe lanes: 44 (Core i9-9940X) vs 80 (Xeon Gold 6434) — the Xeon Gold 6434 offers 36 more lanes for additional GPUs or NVMe drives.
| Feature | Core i9-9940X | Xeon Gold 6434 |
|---|---|---|
| Socket | LGA2066 | LGA4677 |
| PCIe Generation | PCIe 3.0 | PCIe 5.0+67% |
| Max RAM Speed | DDR4-2666 | DDR5-4800+25% |
| Max RAM Capacity | 128 GB | 4096 GB+3100% |
| RAM Channels | 4 | 8+100% |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 44 | 80+82% |
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. Virtualization support: VT-x, VT-d (Core i9-9940X) vs VT-x, VT-d, AMX (Xeon Gold 6434). Primary use case: Core i9-9940X targets Workstation, Xeon Gold 6434 targets Frequency-optimized Server Compute. Direct competitor: Xeon Gold 6434 rivals EPYC 9174F.
| Feature | Core i9-9940X | Xeon Gold 6434 |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | Yes | No |
| AVX-512 | Yes | Yes |
| Virtualization | VT-x, VT-d | VT-x, VT-d, AMX |
| Target Use | Workstation | Frequency-optimized Server Compute |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
You May Also Compare
Similar CPU comparisons based on Core i9-9940X and Xeon Gold 6434
