EPYC 7643P vs Ryzen Threadripper 3990X
EPYC 7643P
Ryzen Threadripper 3990X
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 7643P
Performance Per Dollar Ryzen Threadripper 3990X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 7643P | Ryzen Threadripper 3990X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($2,722) | ⚠️ Higher cost ($2,850) |
| Longevity | ✨ Modern (Milan (2021−2023) / 7 nm) | ✨ Modern (Matisse (2019−2020) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | EPYC 7643P | Ryzen Threadripper 3990X |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+1%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($2,722) | ⚠️ Higher cost ($2,850) |
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 7643P and Ryzen Threadripper 3990X
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.
Ryzen Threadripper 3990X
The Ryzen Threadripper 3990X is manufactured by AMD. It was released in 7 February 2020 (5 years ago). It is based on the Matisse (2019−2020) architecture. It features 64 cores and 128 threads. Base frequency is 2.9 GHz, with boost up to 4.3 GHz. L3 cache: 256 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: TR4. Thermal design power (TDP): 280 Watt. Memory support: DDR4-3200. Passmark benchmark score: 79,889 points. Launch price was $3,999.
Processing Power
The EPYC 7643P packs 48 cores / 96 threads, while the Ryzen Threadripper 3990X offers 64 cores / 128 threads — the Ryzen Threadripper 3990X has 16 more cores. Boost clocks reach 3.6 GHz on the EPYC 7643P versus 4.3 GHz on the Ryzen Threadripper 3990X — a 17.7% clock advantage for the Ryzen Threadripper 3990X (base: 2.3 GHz vs 2.9 GHz). The EPYC 7643P uses the Milan (2021−2023) architecture (7 nm), while the Ryzen Threadripper 3990X uses Matisse (2019−2020) (7 nm, 12 nm). In PassMark, the EPYC 7643P scores 77,307 against the Ryzen Threadripper 3990X's 79,889 — a 3.3% lead for the Ryzen Threadripper 3990X. L3 cache: 256 MB (total) on the EPYC 7643P vs 256 MB on the Ryzen Threadripper 3990X.
| Feature | EPYC 7643P | Ryzen Threadripper 3990X |
|---|---|---|
| Cores / Threads | 48 / 96 | 64 / 128+33% |
| Boost Clock | 3.6 GHz | 4.3 GHz+19% |
| Base Clock | 2.3 GHz | 2.9 GHz+26% |
| L3 Cache | 256 MB (total) | 256 MB |
| L2 Cache | 512 kB (per core) | 512K (per core) |
| Process | 7 nm | 7 nm, 12 nm |
| Architecture | Milan (2021−2023) | Matisse (2019−2020) |
| PassMark | 77,307 | 79,889+3% |
| Cinebench R23 Multi | — | 64,366 |
| Geekbench 6 Single | — | 1,961 |
| Geekbench 6 Multi | — | 22,045 |
Memory & Platform
The EPYC 7643P uses the SP3 socket (PCIe 4.0), while the Ryzen Threadripper 3990X uses TR4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 3200 on the EPYC 7643P versus DDR4-3200 on the Ryzen Threadripper 3990X — the EPYC 7643P supports 199.5% faster memory, which can translate to measurable gains in memory-sensitive workloads. The EPYC 7643P supports up to 4096 of RAM compared to 256 GB — 176.5% more capacity for professional workloads. Memory channels: 8 (EPYC 7643P) vs 4 (Ryzen Threadripper 3990X). PCIe lanes: 128 (EPYC 7643P) vs 88 (Ryzen Threadripper 3990X) — the EPYC 7643P offers 40 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SP3 (EPYC 7643P) and TRX40 (Ryzen Threadripper 3990X).
| Feature | EPYC 7643P | Ryzen Threadripper 3990X |
|---|---|---|
| Socket | SP3 | TR4 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | 3200+79900% | DDR4-3200 |
| Max RAM Capacity | 4096 | 256 GB+6553500% |
| RAM Channels | 8+100% | 4 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 128+45% | 88 |
Advanced Features
Only the Ryzen Threadripper 3990X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: VT-x, VT-d, SEV (EPYC 7643P) vs true (Ryzen Threadripper 3990X). Direct competitor: EPYC 7643P rivals Xeon Platinum 8380; Ryzen Threadripper 3990X rivals Core i9-10980XE.
| Feature | EPYC 7643P | Ryzen Threadripper 3990X |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | Yes |
| AVX-512 | No | No |
| Virtualization | VT-x, VT-d, SEV | true |
Value Analysis
The EPYC 7643P launched at $2722 MSRP, while the Ryzen Threadripper 3990X debuted at $3990. At current prices ($2722 vs $2850), the EPYC 7643P is $128 cheaper. In terms of value (PassMark points per dollar), the EPYC 7643P delivers 28.4 pts/$ vs 28.0 pts/$ for the Ryzen Threadripper 3990X — making the EPYC 7643P the 1.3% better value option.
| Feature | EPYC 7643P | Ryzen Threadripper 3990X |
|---|---|---|
| MSRP | $2722-32% | $3990 |
| Avg Price (30d) | $2722-4% | $2850 |
| Performance per Dollar | 28.4+1% | 28.0 |
| Release Date | 2023 | 2019 |
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