Xeon Gold 6421N vs Core Ultra 9 285HX
Xeon Gold 6421N
Core Ultra 9 285HX
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 Xeon Gold 6421N
Performance Per Dollar Core Ultra 9 285HX
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon Gold 6421N | Core Ultra 9 285HX |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($2,427) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Sapphire Rapids (2023−2024) / Intel 7 nm) | ✨ Modern (Arrow Lake-S (2024−2025) / 3 nm) |
💎 Value Proposition
| Insight | Xeon Gold 6421N | Core Ultra 9 285HX |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($2,427) | ✅ 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 Xeon Gold 6421N and Core Ultra 9 285HX
Xeon Gold 6421N
The Xeon Gold 6421N 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 32 cores and 64 threads. Base frequency is 1.8 GHz, with boost up to 3.6 GHz. L3 cache: 60 MB. L2 cache: 2 MB (per core). Built on Intel 7 nm process technology. Socket: LGA4677. Thermal design power (TDP): 185 Watt. Memory support: DDR5-4400. Passmark benchmark score: 58,797 points. Launch price was $2,368.
Core Ultra 9 285HX
The Core Ultra 9 285HX is manufactured by Intel. It was released in 2025-01-01. It is based on the Arrow Lake-S (2024−2025) architecture. It features 24 cores and 24 threads. Base frequency is 2.8 GHz, with boost up to 5.5 GHz. L3 cache: 36 MB (total). L2 cache: 3 MB (per core). Built on 3 nm process technology. Socket: FCBGA2114. Thermal design power (TDP): 55 Watt. Memory support: DDR5-6400. Passmark benchmark score: 58,732 points. Launch price was $650.
Processing Power
The Xeon Gold 6421N packs 32 cores / 64 threads, while the Core Ultra 9 285HX offers 24 cores / 24 threads — the Xeon Gold 6421N has 8 more cores. Boost clocks reach 3.6 GHz on the Xeon Gold 6421N versus 5.5 GHz on the Core Ultra 9 285HX — a 41.8% clock advantage for the Core Ultra 9 285HX (base: 1.8 GHz vs 2.8 GHz). The Xeon Gold 6421N uses the Sapphire Rapids (2023−2024) architecture (Intel 7 nm), while the Core Ultra 9 285HX uses Arrow Lake-S (2024−2025) (3 nm). In PassMark, the Xeon Gold 6421N scores 58,797 against the Core Ultra 9 285HX's 58,732 — a 0.1% lead for the Xeon Gold 6421N. L3 cache: 60 MB on the Xeon Gold 6421N vs 36 MB (total) on the Core Ultra 9 285HX.
| Feature | Xeon Gold 6421N | Core Ultra 9 285HX |
|---|---|---|
| Cores / Threads | 32 / 64+33% | 24 / 24 |
| Boost Clock | 3.6 GHz | 5.5 GHz+53% |
| Base Clock | 1.8 GHz | 2.8 GHz+56% |
| L3 Cache | 60 MB+67% | 36 MB (total) |
| L2 Cache | 2 MB (per core) | 3 MB (per core)+50% |
| Process | Intel 7 nm | 3 nm-57% |
| Architecture | Sapphire Rapids (2023−2024) | Arrow Lake-S (2024−2025) |
| PassMark | 58,797 | 58,732 |
| Geekbench 6 Single | — | 3,106 |
| Geekbench 6 Multi | — | 22,200 |
Memory & Platform
The Xeon Gold 6421N uses the LGA4677 socket (PCIe 5.0), while the Core Ultra 9 285HX uses FCBGA2114 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 4800 on the Xeon Gold 6421N versus DDR5-6400 on the Core Ultra 9 285HX — the Xeon Gold 6421N supports 199.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon Gold 6421N supports up to 4096 of RAM compared to 192 GB — 182.1% more capacity for professional workloads. Memory channels: 8 (Xeon Gold 6421N) vs 2 (Core Ultra 9 285HX). PCIe lanes: 80 (Xeon Gold 6421N) vs 24 (Core Ultra 9 285HX) — the Xeon Gold 6421N offers 56 more lanes for additional GPUs or NVMe drives. Chipset compatibility: C741 (Xeon Gold 6421N) and Intel HM870 (Core Ultra 9 285HX).
| Feature | Xeon Gold 6421N | Core Ultra 9 285HX |
|---|---|---|
| Socket | LGA4677 | FCBGA2114 |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| Max RAM Speed | 4800+95900% | DDR5-6400 |
| Max RAM Capacity | 4096 | 192 GB+4915100% |
| RAM Channels | 8+300% | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 80+233% | 24 |
Advanced Features
Only the Core Ultra 9 285HX has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Xeon Gold 6421N supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: VT-x, VT-d (Xeon Gold 6421N) vs true (Core Ultra 9 285HX). The Core Ultra 9 285HX includes integrated graphics (Intel Arc Graphics), while the Xeon Gold 6421N requires a dedicated GPU. Direct competitor: Xeon Gold 6421N rivals EPYC 9354; Core Ultra 9 285HX rivals Ryzen 9 7945HX3D.
| Feature | Xeon Gold 6421N | Core Ultra 9 285HX |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | None | Intel Arc Graphics |
| Unlocked | No | Yes |
| AVX-512 | Yes | No |
| Virtualization | VT-x, VT-d | true |
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