EPYC 7642 vs Xeon Gold 6421N
EPYC 7642
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 EPYC 7642
Performance Per Dollar Xeon Gold 6421N
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 7642 | Xeon Gold 6421N |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($850) | ⚠️ Higher cost ($2,427) |
| Longevity | ✨ Modern (Zen 2 (2017−2020) / 7 nm, 14 nm) | ✨ Modern (Sapphire Rapids (2023−2024) / Intel 7 nm) |
💎 Value Proposition
| Insight | EPYC 7642 | Xeon Gold 6421N |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+188%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($850) | ⚠️ 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 EPYC 7642 and Xeon Gold 6421N
EPYC 7642
The EPYC 7642 is manufactured by AMD. It was released in 7 August 2019 (6 years ago). It is based on the Zen 2 (2017−2020) architecture. It features 48 cores and 96 threads. Base frequency is 2.4 GHz, with boost up to 3.4 GHz. L3 cache: 256 MB (total). L2 cache: 512K (per core). Built on 7 nm, 14 nm process technology. Socket: TR4. Thermal design power (TDP): 225 Watt. Memory support: DDR4 Eight-channel. Passmark benchmark score: 59,333 points. Launch price was $4,775.
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 EPYC 7642 packs 48 cores / 96 threads, while the Xeon Gold 6421N offers 32 cores / 64 threads — the EPYC 7642 has 16 more cores. Boost clocks reach 3.4 GHz on the EPYC 7642 versus 3.6 GHz on the Xeon Gold 6421N — a 5.7% clock advantage for the Xeon Gold 6421N (base: 2.4 GHz vs 1.8 GHz). The EPYC 7642 uses the Zen 2 (2017−2020) architecture (7 nm, 14 nm), while the Xeon Gold 6421N uses Sapphire Rapids (2023−2024) (Intel 7 nm). In PassMark, the EPYC 7642 scores 59,333 against the Xeon Gold 6421N's 58,797 — a 0.9% lead for the EPYC 7642. L3 cache: 256 MB (total) on the EPYC 7642 vs 60 MB on the Xeon Gold 6421N.
| Feature | EPYC 7642 | Xeon Gold 6421N |
|---|---|---|
| Cores / Threads | 48 / 96+50% | 32 / 64 |
| Boost Clock | 3.4 GHz | 3.6 GHz+6% |
| Base Clock | 2.4 GHz+33% | 1.8 GHz |
| L3 Cache | 256 MB (total)+327% | 60 MB |
| L2 Cache | 512K (per core) | 2 MB (per core)+300% |
| Process | 7 nm, 14 nm | Intel 7 nm |
| Architecture | Zen 2 (2017−2020) | Sapphire Rapids (2023−2024) |
| PassMark | 59,333 | 58,797 |
Memory & Platform
The EPYC 7642 uses the TR4 socket (PCIe 4.0), while the Xeon Gold 6421N uses LGA4677 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 3200 on the EPYC 7642 versus 4800 on the Xeon Gold 6421N — the Xeon Gold 6421N supports 40% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 4096 of RAM. Both feature 8-channel memory with ECC support. PCIe lanes: 128 (EPYC 7642) vs 80 (Xeon Gold 6421N) — the EPYC 7642 offers 48 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SP3 (EPYC 7642) and C741 (Xeon Gold 6421N).
| Feature | EPYC 7642 | Xeon Gold 6421N |
|---|---|---|
| Socket | TR4 | LGA4677 |
| PCIe Generation | PCIe 4.0 | PCIe 5.0+25% |
| Max RAM Speed | 3200 | 4800+50% |
| Max RAM Capacity | 4096 | 4096 |
| RAM Channels | 8 | 8 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 128+60% | 80 |
Advanced Features
Neither processor supports overclocking. Only the Xeon Gold 6421N supports AVX-512 instructions — important for machine learning and scientific applications. Both support VT-x, VT-d virtualization. Direct competitor: EPYC 7642 rivals Xeon Platinum 8380; Xeon Gold 6421N rivals EPYC 9354.
| Feature | EPYC 7642 | Xeon Gold 6421N |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | No |
| AVX-512 | No | Yes |
| Virtualization | VT-x, VT-d | VT-x, VT-d |
Value Analysis
The EPYC 7642 launched at $4775 MSRP, while the Xeon Gold 6421N debuted at $2368. At current prices ($850 vs $2427), the EPYC 7642 is $1577 cheaper. In terms of value (PassMark points per dollar), the EPYC 7642 delivers 69.8 pts/$ vs 24.2 pts/$ for the Xeon Gold 6421N — making the EPYC 7642 the 96.9% better value option.
| Feature | EPYC 7642 | Xeon Gold 6421N |
|---|---|---|
| MSRP | $4775 | $2368-50% |
| Avg Price (30d) | $850-65% | $2427 |
| Performance per Dollar | 69.8+188% | 24.2 |
| Release Date | 2019 | 2023 |
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