Xeon w9-3575X vs EPYC 7643P
Xeon w9-3575X
EPYC 7643P
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 w9-3575X
Performance Per Dollar EPYC 7643P
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon w9-3575X | EPYC 7643P |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($675) | ⚠️ Higher cost ($2,722) |
| Longevity | ✨ Modern (Sapphire Rapids (2023−2024) / Intel 7 nm) | ✨ Modern (Milan (2021−2023) / 7 nm) |
💎 Value Proposition
| Insight | Xeon w9-3575X | EPYC 7643P |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+330%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($675) | ⚠️ Higher cost ($2,722) |
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 w9-3575X and EPYC 7643P
Xeon w9-3575X
The Xeon w9-3575X is manufactured by Intel. It was released in 24 August 2024 (1 year ago). It is based on the Sapphire Rapids (2023−2024) architecture. It features 44 cores and 88 threads. Base frequency is 2.2 GHz, with boost up to 4.8 GHz. L3 cache: 97.5 MB. L2 cache: 2 MB (per core). Built on Intel 7 nm process technology. Socket: LGA4677. Thermal design power (TDP): 340 Watt. Memory support: DDR5-4800. Passmark benchmark score: 82,507 points. Launch price was $3,789.
EPYC 7643P
The EPYC 7643P is manufactured by AMD. It was released in 5 September 2023 (2 years ago). It is based on the Milan (2021−2023) architecture. It features 48 cores and 96 threads. Base frequency is 2.3 GHz, with boost up to 3.6 GHz. L3 cache: 256 MB (total). L2 cache: 512 kB (per core). Built on 7 nm process technology. Socket: SP3. Thermal design power (TDP): 225 Watt. Memory support: DDR4. Passmark benchmark score: 77,307 points. Launch price was $2,722.
Processing Power
The Xeon w9-3575X packs 44 cores / 88 threads, while the EPYC 7643P offers 48 cores / 96 threads — the EPYC 7643P has 4 more cores. Boost clocks reach 4.8 GHz on the Xeon w9-3575X versus 3.6 GHz on the EPYC 7643P — a 28.6% clock advantage for the Xeon w9-3575X (base: 2.2 GHz vs 2.3 GHz). The Xeon w9-3575X uses the Sapphire Rapids (2023−2024) architecture (Intel 7 nm), while the EPYC 7643P uses Milan (2021−2023) (7 nm). In PassMark, the Xeon w9-3575X scores 82,507 against the EPYC 7643P's 77,307 — a 6.5% lead for the Xeon w9-3575X. L3 cache: 97.5 MB on the Xeon w9-3575X vs 256 MB (total) on the EPYC 7643P.
| Feature | Xeon w9-3575X | EPYC 7643P |
|---|---|---|
| Cores / Threads | 44 / 88 | 48 / 96+9% |
| Boost Clock | 4.8 GHz+33% | 3.6 GHz |
| Base Clock | 2.2 GHz | 2.3 GHz+5% |
| L3 Cache | 97.5 MB | 256 MB (total)+163% |
| L2 Cache | 2 MB (per core)+300% | 512 kB (per core) |
| Process | Intel 7 nm | 7 nm |
| Architecture | Sapphire Rapids (2023−2024) | Milan (2021−2023) |
| PassMark | 82,507+7% | 77,307 |
| Cinebench R23 Multi | 60,000 | — |
| Geekbench 6 Single | 2,300 | — |
| Geekbench 6 Multi | 19,320 | — |
Memory & Platform
The Xeon w9-3575X uses the LGA4677 socket (PCIe 5.0), while the EPYC 7643P uses SP3 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800 on the Xeon w9-3575X versus 3200 on the EPYC 7643P — the EPYC 7643P supports 199.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 4096 GB of RAM. Both feature 8-channel memory with ECC support. PCIe lanes: 112 (Xeon w9-3575X) vs 128 (EPYC 7643P) — the EPYC 7643P offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: W790 (Xeon w9-3575X) and SP3 (EPYC 7643P).
| Feature | Xeon w9-3575X | EPYC 7643P |
|---|---|---|
| Socket | LGA4677 | SP3 |
| PCIe Generation | PCIe 5.0+25% | PCIe 4.0 |
| Max RAM Speed | DDR5-4800 | 3200+63900% |
| Max RAM Capacity | 4096 GB+104857500% | 4096 |
| RAM Channels | 8 | 8 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 112 | 128+14% |
Advanced Features
Only the Xeon w9-3575X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Xeon w9-3575X supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: true (Xeon w9-3575X) vs VT-x, VT-d, SEV (EPYC 7643P). Direct competitor: Xeon w9-3575X rivals Ryzen Threadripper 7970X; EPYC 7643P rivals Xeon Platinum 8380.
| Feature | Xeon w9-3575X | EPYC 7643P |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | Yes | No |
| AVX-512 | Yes | No |
| Virtualization | true | VT-x, VT-d, SEV |
Value Analysis
The Xeon w9-3575X launched at $3789 MSRP, while the EPYC 7643P debuted at $2722. At current prices ($675 vs $2722), the Xeon w9-3575X is $2047 cheaper. In terms of value (PassMark points per dollar), the Xeon w9-3575X delivers 122.2 pts/$ vs 28.4 pts/$ for the EPYC 7643P — making the Xeon w9-3575X the 124.6% better value option.
| Feature | Xeon w9-3575X | EPYC 7643P |
|---|---|---|
| MSRP | $3789 | $2722-28% |
| Avg Price (30d) | $675-75% | $2722 |
| Performance per Dollar | 122.2+330% | 28.4 |
| Release Date | 2024 | 2023 |
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