EPYC 7643
Ryzen Threadripper PRO 5975WX
EPYC 7643 vs Ryzen Threadripper PRO 5975WX 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 7643 vs Ryzen Threadripper PRO 5975WX 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 7643 vs Ryzen Threadripper PRO 5975WX: Pros, Cons & Final Verdict
See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.
EPYC 7643
2021Why buy it
- ✅+100% larger total L3 cache (256 MB vs 128 MB).
- ✅Draws 225W instead of 280W, a 55W reduction.
Trade-offs
- ❌Worse for gaming: lower average FPS than Ryzen Threadripper PRO 5975WX across 50 shared CPU benchmark tests.
- ❌Lower Geekbench multi-core (15,000 vs 29,745).
- ❌Lower PassMark per dollar, at 15.2 vs 30.1 PassMark/$ ($4,995 MSRP vs $2,495 MSRP).
Ryzen Threadripper PRO 5975WX
2022Why buy it
- ✅Better for gaming: +43.1% higher average FPS across 50 shared CPU benchmark tests.
- ✅Costs $2,500 less on MSRP ($2,495 MSRP vs $4,995 MSRP).
- ✅Delivers 97.4% more PassMark for each dollar spent, at 30.1 vs 15.2 PassMark/$ ($2,495 MSRP vs $4,995 MSRP).
Trade-offs
- ❌Smaller total L3 cache (128 MB vs 256 MB).
- ❌24.4% higher power demand at 280W vs 225W.
Quick Answers
So, is Ryzen Threadripper PRO 5975WX better than EPYC 7643?
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 7643 vs Ryzen Threadripper PRO 5975WX Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
EPYC 7643
The EPYC 7643 is manufactured by AMD. It was released in 15 March 2021 (4 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: DDR4-3200. Passmark benchmark score: 76,050 points. Launch price was $4,995.
Ryzen Threadripper PRO 5975WX
The Ryzen Threadripper PRO 5975WX is manufactured by AMD. It was released in 2022-03-08. It is based on the Chagall PRO (2022) architecture. It features 32 cores and 64 threads. Base frequency is 3.6 GHz, with boost up to 4.5 GHz. L3 cache: 128 MB. L2 cache: 512K (per core). Built on 7 nm process technology. Socket: sWRX8. Thermal design power (TDP): 280 Watt. Memory support: DDR4-3200. Passmark benchmark score: 74,985 points. Launch price was $3,299.
Processing Power
The EPYC 7643 packs 48 cores / 96 threads, while the Ryzen Threadripper PRO 5975WX offers 32 cores / 64 threads — the EPYC 7643 has 16 more cores. Boost clocks reach 3.6 GHz on the EPYC 7643 versus 4.5 GHz on the Ryzen Threadripper PRO 5975WX — a 22.2% clock advantage for the Ryzen Threadripper PRO 5975WX (base: 2.3 GHz vs 3.6 GHz). The EPYC 7643 uses the Milan (2021−2023) architecture (7 nm+), while the Ryzen Threadripper PRO 5975WX uses Chagall PRO (2022) (7 nm). In PassMark, the EPYC 7643 scores 76,050 against the Ryzen Threadripper PRO 5975WX's 74,985 — a 1.4% lead for the EPYC 7643. Geekbench 6 single-core — the metric most relevant to gaming — records 1,671 vs 1,686, a 0.9% lead for the Ryzen Threadripper PRO 5975WX that directly translates to higher frame rates. Multi-core Geekbench: 15,000 vs 29,745 (65.9% advantage for the Ryzen Threadripper PRO 5975WX). L3 cache: 256 MB (total) on the EPYC 7643 vs 128 MB on the Ryzen Threadripper PRO 5975WX.
| Feature | EPYC 7643 | Ryzen Threadripper PRO 5975WX |
|---|---|---|
| Cores / Threads | 48 / 96+50% | 32 / 64 |
| Boost Clock | 3.6 GHz | 4.5 GHz+25% |
| Base Clock | 2.3 GHz | 3.6 GHz+57% |
| L3 Cache | 256 MB (total)+100% | 128 MB |
| L2 Cache | 512 kB (per core) | 512K (per core) |
| Process | 7 nm+ | 7 nm |
| Architecture | Milan (2021−2023) | Chagall PRO (2022) |
| PassMark | 76,050+1% | 74,985 |
| Cinebench R23 Multi | — | 53,977 |
| Geekbench 6 Single | 1,671 | 1,686 |
| Geekbench 6 Multi | 15,000 | 29,745+98% |
Memory & Platform
The EPYC 7643 uses the SP3 socket (PCIe 4.0), while the Ryzen Threadripper PRO 5975WX uses sWRX8 (PCIe 4.0) — making them incompatible on the same motherboard. Both support up to DDR4-3200 memory speed. The EPYC 7643 supports up to 4 TB of RAM compared to 2048 GB — 100% more capacity for professional workloads. Both feature 8-channel memory with ECC support. Both provide 128 PCIe lanes. Chipset compatibility: SP3 (EPYC 7643) and WRX80 (Ryzen Threadripper PRO 5975WX).
| Feature | EPYC 7643 | Ryzen Threadripper PRO 5975WX |
|---|---|---|
| Socket | SP3 | sWRX8 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | DDR4-3200 | DDR4-3200 |
| Max RAM Capacity | 4 TB+100% | 2048 GB |
| RAM Channels | 8 | 8 |
| ECC Support | Yes | Yes |
| PCIe Lanes | 128 | 128 |
Advanced Features
Only the Ryzen Threadripper PRO 5975WX has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: AMD-V (EPYC 7643) vs true (Ryzen Threadripper PRO 5975WX). Primary use case: EPYC 7643 targets Server. Direct competitor: EPYC 7643 rivals EPYC 7443P; Ryzen Threadripper PRO 5975WX rivals Xeon Gold 6338.
| Feature | EPYC 7643 | Ryzen Threadripper PRO 5975WX |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | Yes |
| AVX-512 | No | No |
| Virtualization | AMD-V | true |
| Target Use | Server | — |
Value Analysis
At launch, the EPYC 7643 was priced at $4995, while the Ryzen Threadripper PRO 5975WX came in at $2495. On launch pricing ($4995 vs $2495), Ryzen Threadripper PRO 5975WX was $2500 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 7643 delivers 15.2 pts/$ vs 30.1 pts/$ for the Ryzen Threadripper PRO 5975WX — making the Ryzen Threadripper PRO 5975WX the 65.5% better value option.
| Feature | EPYC 7643 | Ryzen Threadripper PRO 5975WX |
|---|---|---|
| MSRP | $4995 | $2495-50% |
| Performance per Dollar | 15.2 | 30.1+98% |
| Release Date | 2021 | 2022 |
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