EPYC 7643P
Xeon w9-3575X
EPYC 7643P vs Xeon w9-3575X Performance Spectrum
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.
EPYC 7643P vs Xeon w9-3575X FPS Benchmarks
Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.
Search any supported game below to compare 1080p FPS for both components.
Path of Exile 2
Counter-Strike 2
League of Legends
Valorant
Among Us
Apex Legends
ARC Raiders
Baldur's Gate 3
Call of Duty: Black Ops 6
EPYC 7643P vs Xeon w9-3575X: Pros, Cons & Final Verdict
See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.
EPYC 7643P
2023Why buy it
- ✅+162.6% larger total L3 cache (256 MB vs 98 MB).
- ✅Costs $1,067 less on MSRP ($2,722 MSRP vs $3,789 MSRP).
- ✅Delivers 30.4% more PassMark for each dollar spent, at 28.4 vs 21.8 PassMark/$ ($2,722 MSRP vs $3,789 MSRP).
- ✅Draws 225W instead of 340W, a 115W reduction.
- ✅14.3% more PCIe lanes (128 vs 112) for storage and expansion-heavy builds.
Trade-offs
- ❌Worse for gaming: lower average FPS than Xeon w9-3575X across 50 shared CPU benchmark tests.
- ❌Lower PassMark (77,307 vs 82,507).
- ❌Older platform position on SP3 with DDR4, while Xeon w9-3575X moves to LGA4677 and DDR5.
Xeon w9-3575X
2024Why buy it
- ✅Better for gaming: +22.0% higher average FPS across 50 shared CPU benchmark tests.
- ✅Newer platform on LGA4677 with DDR5 support instead of SP3 and DDR4.
- ✅AVX-512 support for select workstation, AI, and scientific workloads.
Trade-offs
- ❌Smaller total L3 cache (98 MB vs 256 MB).
- ❌Lower PassMark per dollar, at 21.8 vs 28.4 PassMark/$ ($3,789 MSRP vs $2,722 MSRP).
- ❌51.1% higher power demand at 340W vs 225W.
Quick Answers
So, is Xeon w9-3575X better than EPYC 7643P?
Which one is better for gaming?
Which one is better for streaming, content creation, and heavy multitasking?
Which one is the smarter buy today, not just the cheaper CPU?
Which one is more future-proof for 2026 and beyond?
EPYC 7643P vs Xeon w9-3575X Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
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.
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.
Processing Power
The EPYC 7643P packs 48 cores / 96 threads, while the Xeon w9-3575X offers 44 cores / 88 threads — the EPYC 7643P has 4 more cores. Boost clocks reach 3.6 GHz on the EPYC 7643P versus 4.8 GHz on the Xeon w9-3575X — a 28.6% clock advantage for the Xeon w9-3575X (base: 2.3 GHz vs 2.2 GHz). The EPYC 7643P uses the Milan (2021−2023) architecture (7 nm), while the Xeon w9-3575X uses Sapphire Rapids (2023−2024) (Intel 7 nm). In PassMark, the EPYC 7643P scores 77,307 against the Xeon w9-3575X's 82,507 — a 6.5% lead for the Xeon w9-3575X. L3 cache: 256 MB (total) on the EPYC 7643P vs 97.5 MB on the Xeon w9-3575X.
| Feature | EPYC 7643P | Xeon w9-3575X |
|---|---|---|
| Cores / Threads | 48 / 96+9% | 44 / 88 |
| Boost Clock | 3.6 GHz | 4.8 GHz+33% |
| Base Clock | 2.3 GHz+5% | 2.2 GHz |
| L3 Cache | 256 MB (total)+163% | 97.5 MB |
| L2 Cache | 512 kB (per core) | 2 MB (per core)+300% |
| Process | 7 nm | Intel 7 nm |
| Architecture | Milan (2021−2023) | Sapphire Rapids (2023−2024) |
| PassMark | 77,307 | 82,507+7% |
| Cinebench R23 Multi | — | 60,000 |
| Geekbench 6 Single | — | 2,300 |
| Geekbench 6 Multi | — | 19,320 |
Memory & Platform
The EPYC 7643P uses the SP3 socket (PCIe 4.0), while the Xeon w9-3575X uses LGA4677 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 3200 on the EPYC 7643P versus DDR5-4800 on the Xeon w9-3575X — the Xeon w9-3575X supports 50% 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: 128 (EPYC 7643P) vs 112 (Xeon w9-3575X) — the EPYC 7643P offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SP3 (EPYC 7643P) and W790 (Xeon w9-3575X).
| Feature | EPYC 7643P | Xeon w9-3575X |
|---|---|---|
| Socket | SP3 | LGA4677 |
| PCIe Generation | PCIe 4.0 | PCIe 5.0+25% |
| Max RAM Speed | 3200 | DDR5-4800+50% |
| Max RAM Capacity | 4096 GB | 4096 GB |
| RAM Channels | 8 | 8 |
| ECC Support | Yes | Yes |
| PCIe Lanes | 128+14% | 112 |
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: VT-x, VT-d, SEV (EPYC 7643P) vs true (Xeon w9-3575X). Direct competitor: EPYC 7643P rivals Xeon Platinum 8380; Xeon w9-3575X rivals Ryzen Threadripper 7970X.
| Feature | EPYC 7643P | Xeon w9-3575X |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | Yes |
| AVX-512 | No | Yes |
| Virtualization | VT-x, VT-d, SEV | true |
Value Analysis
At launch, the EPYC 7643P was priced at $2722, while the Xeon w9-3575X came in at $3789. On launch pricing ($2722 vs $3789), EPYC 7643P was $1067 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 7643P delivers 28.4 pts/$ vs 21.8 pts/$ for the Xeon w9-3575X — making the EPYC 7643P the 26.4% better value option.
| Feature | EPYC 7643P | Xeon w9-3575X |
|---|---|---|
| MSRP | $2722-28% | $3789 |
| Performance per Dollar | 28.4+30% | 21.8 |
| Release Date | 2023 | 2024 |
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