9th Gen Intel Core i9-9940X
- Boost/Base Clock:
- 4.5 GHz / 3.3 GHz
- Core/Thread Count:
- 14 Core / 28 Thread
- Cache:
- 19.25MB L3 + 14MB L2 + 896KB L1
- TDP:
- 165 Watts
- CPU Process Node:
- 14 Nanometers
- CPU Socket:
- FCLGA2066
- CPU Series:
- Skylake-X
- Memory Support:
- DDR4-2666
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Manufacturer: Intel Last updated: September 9, 2026
Description
The 9th Gen Intel Core i9-9940X is a 14-core, 28-thread HEDT processor built on Skylake-X, running a 3.3 GHz base clock that boosts to 4.5 GHz within a 165 Watt TDP on the LGA2066 socket.
Sitting between the 12-core 9920X and 16-core 9960X in Intel's 9th Gen X-series stack, this chip offered a genuine mid-tier core count option for prosumer workstation buyers.
Platform
This HEDT chip requires an X299-series motherboard on the LGA2066 socket, typically paired with quad-channel memory for genuine workstation-scale bandwidth.
How Is the Core i9-9940X in Terms of Performance
With 14 cores and 28 threads, this chip targets demanding workstation and content-creation workloads, offering a genuine mid-tier core count within Intel's 9th Gen X-series stack between the 9920X and 9960X.
Benchmarks
As a genuine 14-core Skylake-X HEDT chip with a strong 4.5 GHz boost ceiling, this processor delivers solid workstation-tier multi-threaded throughput at Intel's 9th Gen X-series mid-tier core count.
Specifications
| Form Factor | Server & Enthusiast |
|---|---|
| Brand | Intel |
| Series | Core i9 |
| Model Number | 9940X |
| Boost/Base Clock | 4.5 GHz / 3.3 GHz |
| Core/Thread Count | 14 Core / 28 Thread |
| Cache | 19.25MB L3 + 14MB L2 + 896KB L1 |
| TDP | 165 Watts |
| CPU Process Node | 14 Nanometers |
| CPU Socket | FCLGA2066 |
| CPU Series | Skylake-X, 9th Gen Intel Core |
| Memory Support | DDR4-2666, non-ECC (ECC not supported) |
Expert Review
Rated by the Consumercarts editorial team, not by users
Best for
- Prosumer workstation workloads wanting a mid-tier core count balance within Intel's 9th Gen X-series HEDT stack
Not for
- Buyers with more modest core-count needs — the 9900X or 9920X offer HEDT platform features at a lower price