Core Ultra 9 285HX vs Xeon Gold 6421N
Core Ultra 9 285HX
Xeon Gold 6421N
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 Ultra 9 285HX
Performance Per Dollar Xeon Gold 6421N
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core Ultra 9 285HX | Xeon Gold 6421N |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($2,427) |
| Longevity | ✨ Modern (Arrow Lake-S (2024−2025) / 3 nm) | ✨ Modern (Sapphire Rapids (2023−2024) / Intel 7 nm) |
💎 Value Proposition
| Insight | Core Ultra 9 285HX | Xeon Gold 6421N |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($2,427) |
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 Ultra 9 285HX and Xeon Gold 6421N
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.
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.
Processing Power
The Core Ultra 9 285HX packs 24 cores / 24 threads, while the Xeon Gold 6421N offers 32 cores / 64 threads — the Xeon Gold 6421N has 8 more cores. Boost clocks reach 5.5 GHz on the Core Ultra 9 285HX versus 3.6 GHz on the Xeon Gold 6421N — a 41.8% clock advantage for the Core Ultra 9 285HX (base: 2.8 GHz vs 1.8 GHz). The Core Ultra 9 285HX uses the Arrow Lake-S (2024−2025) architecture (3 nm), while the Xeon Gold 6421N uses Sapphire Rapids (2023−2024) (Intel 7 nm). In PassMark, the Core Ultra 9 285HX scores 58,732 against the Xeon Gold 6421N's 58,797 — a 0.1% lead for the Xeon Gold 6421N. L3 cache: 36 MB (total) on the Core Ultra 9 285HX vs 60 MB on the Xeon Gold 6421N.
| Feature | Core Ultra 9 285HX | Xeon Gold 6421N |
|---|---|---|
| Cores / Threads | 24 / 24 | 32 / 64+33% |
| Boost Clock | 5.5 GHz+53% | 3.6 GHz |
| Base Clock | 2.8 GHz+56% | 1.8 GHz |
| L3 Cache | 36 MB (total) | 60 MB+67% |
| L2 Cache | 3 MB (per core)+50% | 2 MB (per core) |
| Process | 3 nm-57% | Intel 7 nm |
| Architecture | Arrow Lake-S (2024−2025) | Sapphire Rapids (2023−2024) |
| PassMark | 58,732 | 58,797 |
| Geekbench 6 Single | 3,106 | — |
| Geekbench 6 Multi | 22,200 | — |
Memory & Platform
The Core Ultra 9 285HX uses the FCBGA2114 socket (PCIe 5.0), while the Xeon Gold 6421N uses LGA4677 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-6400 on the Core Ultra 9 285HX versus 4800 on the Xeon Gold 6421N — 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: 2 (Core Ultra 9 285HX) vs 8 (Xeon Gold 6421N). PCIe lanes: 24 (Core Ultra 9 285HX) vs 80 (Xeon Gold 6421N) — the Xeon Gold 6421N offers 56 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel HM870 (Core Ultra 9 285HX) and C741 (Xeon Gold 6421N).
| Feature | Core Ultra 9 285HX | Xeon Gold 6421N |
|---|---|---|
| Socket | FCBGA2114 | LGA4677 |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| Max RAM Speed | DDR5-6400 | 4800+95900% |
| Max RAM Capacity | 192 GB+4915100% | 4096 |
| RAM Channels | 2 | 8+300% |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 24 | 80+233% |
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: true (Core Ultra 9 285HX) vs VT-x, VT-d (Xeon Gold 6421N). The Core Ultra 9 285HX includes integrated graphics (Intel Arc Graphics), while the Xeon Gold 6421N requires a dedicated GPU. Direct competitor: Core Ultra 9 285HX rivals Ryzen 9 7945HX3D; Xeon Gold 6421N rivals EPYC 9354.
| Feature | Core Ultra 9 285HX | Xeon Gold 6421N |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | Intel Arc Graphics | None |
| Unlocked | Yes | No |
| AVX-512 | No | Yes |
| Virtualization | true | VT-x, VT-d |
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