EPYC 7643P
Ryzen Threadripper 3990X
EPYC 7643P vs Ryzen Threadripper 3990X 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 Ryzen Threadripper 3990X 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 Ryzen Threadripper 3990X: 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
- ✅Costs $1,268 less on MSRP ($2,722 MSRP vs $3,990 MSRP).
- ✅Delivers 41.8% more PassMark for each dollar spent, at 28.4 vs 20.0 PassMark/$ ($2,722 MSRP vs $3,990 MSRP).
- ✅Draws 225W instead of 280W, a 55W reduction.
- ✅45.5% more PCIe lanes (128 vs 88) for storage and expansion-heavy builds.
Trade-offs
- ❌Worse for gaming: lower average FPS than Ryzen Threadripper 3990X across 50 shared CPU benchmark tests.
- ❌Lower PassMark (77,307 vs 79,889).
Ryzen Threadripper 3990X
2019Why buy it
- ✅Better for gaming: +15.7% higher average FPS across 50 shared CPU benchmark tests.
Trade-offs
- ❌Lower PassMark per dollar, at 20.0 vs 28.4 PassMark/$ ($3,990 MSRP vs $2,722 MSRP).
- ❌24.4% higher power demand at 280W vs 225W.
Quick Answers
So, is Ryzen Threadripper 3990X 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 Ryzen Threadripper 3990X 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.
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. Both support up to 3200 memory speed. The EPYC 7643P supports up to 4096 GB of RAM compared to 256 GB — 1500% 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 | DDR4-3200 |
| Max RAM Capacity | 4096 GB+1500% | 256 GB |
| RAM Channels | 8+100% | 4 |
| ECC Support | Yes | Yes |
| 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
At launch, the EPYC 7643P was priced at $2722, while the Ryzen Threadripper 3990X came in at $3990. On launch pricing ($2722 vs $3990), EPYC 7643P was $1268 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 7643P delivers 28.4 pts/$ vs 20.0 pts/$ for the Ryzen Threadripper 3990X — making the EPYC 7643P the 34.6% better value option.
| Feature | EPYC 7643P | Ryzen Threadripper 3990X |
|---|---|---|
| MSRP | $2722-32% | $3990 |
| Performance per Dollar | 28.4+42% | 20.0 |
| Release Date | 2023 | 2019 |
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