Ryzen Threadripper 9980X
64C/128T · 5.4 GHz · 350 W · sTR5 · PassMark #11
Ryzen 9 3900X
Zen 2 · 12C/24T · 105 W · AM4
Dead heat — it comes down to priorities.
In our weighted Specdex score, Ryzen Threadripper 9980X lands at 80 and Ryzen 9 3900X at 80. With scores tied, the decision hinges on which sub-scores matter most to you.
Pick Ryzen Threadripper 9980X if…
- ✓PassMark rank #11 — strong productivity throughput
- ✓HEDT platform with abundant PCIe and memory lanes
- ✓Current PassMark-tracked street price around $4,399
Pick Ryzen 9 3900X if…
- ✓AM4/AM5 longevity
- ✓Multi-thread value
- ✓Unlocked multipliers
Winner by scenario
Derived from the sub-score breakdown · not a separate testValue for money
Ryzen 9 3900XSpecdex score per dollar at MSRP
Ryzen 9 3900X more score per dollar ($499 vs $4,999).
Score breakdown
Specs side-by-side
| Spec | Ryzen Threadripper 9980X | Ryzen 9 3900X |
|---|---|---|
| Cores | ▲ 64 | 12 |
| Threads | ▲ 128 | 24 |
| Base clock | 3.2 GHz | — |
| Boost clock | 5.4 GHz | — |
| L3 cache | 256 MB | — |
| TDP | 350 W | 105 W |
| Socket | sTR5 | AM4 |
| Platform | TRX50 | — |
| Memory | 4-channel DDR5-6400 ECC RDIMM, up to 1TB | — |
| PCIe | 48x PCIe 5.0 + 32x PCIe 4.0 from CPU (80 CPU lanes) + chipset x4 uplink | — |
| PassMark rank | #11 of 5,901 | — |
| PassMark CPU Mark | 142,812 | — |
| Architecture | — | Zen 2 |
| Release year | — | 2019 |
Ryzen Threadripper 9980X
- +PassMark rank #11 — strong productivity throughput
- +HEDT platform with abundant PCIe and memory lanes
- +Current PassMark-tracked street price around $4,399
- −HEDT motherboards and cooling raise total platform cost
Ryzen 9 3900X
- +AM4/AM5 longevity
- +Multi-thread value
- +Unlocked multipliers
- −DDR5 required on AM5
- −iGPU optional
- −X3D variants better for gaming
FAQ: Ryzen Threadripper 9980X vs Ryzen 9 3900X
Which is better, Ryzen Threadripper 9980X or Ryzen 9 3900X? +
Both score 80 on our weighted rubric — tied. Your best pick depends on the sub-scores above.
Is Ryzen Threadripper 9980X worth the price? +
At $4,999, Ryzen Threadripper 9980X delivers a Specdex score of 80 — strongest in passmark.
Is Ryzen 9 3900X worth the price? +
At $499, Ryzen 9 3900X delivers a Specdex score of 80 — strongest in multi.
Does Ryzen Threadripper 9980X or Ryzen 9 3900X last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.
Which is the better value, Ryzen Threadripper 9980X or Ryzen 9 3900X? +
Ryzen 9 3900X — more score per dollar ($499 vs $4,999). Specdex score per dollar at MSRP.