9th Gen Intel Core i9 9800X
- Boost/Base Clock:
- 4.5 GHz / 3.8 GHz
- Core/Thread Count:
- 8 Core / 16 Thread
- Cache:
- 16.5MB L3 + 8MB L2 + 512KB L1
- TDP:
- 165 Watts
- CPU Socket:
- FCLGA2066
- CPU Series:
- Skylake-X, 9th Gen Intel Core
- Memory Support:
- DDR4-2666, non-ECC (ECC not supported)
- Form Factor:
- Server & Enthusiast
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Manufacturer: Intel Last updated: September 9, 2026
9th Gen Intel Core i9 9800X Review
The 9th Gen Intel Core i9 9800X is the entry point into Intel's 9th Gen X-series HEDT stack, an 8-core, 16-thread processor running a genuinely high 3.8 GHz base clock that boosts to 4.5 GHz within a 165 Watt TDP.
As the most accessible core-count option in the 9th Gen X-series lineup, this chip offered the genuine HEDT platform advantages of quad-channel memory at the lowest core count within the stack.
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 9800X in Terms of Performance
With 8 cores and 16 threads plus a genuinely high 3.8 GHz base clock, this chip offers the HEDT platform's memory bandwidth advantages at the most accessible core-count entry point within the 9th Gen X-series stack.
Benchmarks
As the entry-tier chip in Intel's 9th Gen X-series HEDT lineup with a strong 3.8 GHz base clock, this processor delivers solid per-core performance alongside genuine HEDT platform access at the stack's most accessible core count.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Buyers wanting HEDT platform features at the most accessible entry point in Intel's 9th Gen X-series stack
Not for
- Buyers needing higher core counts, the 9820X, 9920X, and 9960X offer more on the same platform
Specifications
What these specs meanIdentity
| Brand | Intel |
|---|---|
| Model Number | 9800X |
| Product Family | Core i9 |
Cores and threads
| Core Count | 8 cores |
|---|---|
| Thread Count | 16 threads |
Clocks
| Base Clock | 3.8 GHz |
|---|---|
| Boost Clock | 4.5 GHz |
Cache
| L2 Cache | 8 MB |
|---|---|
| L3 Cache | 16.5 MB |
Platform
| Socket | FCLGA2066 |
|---|
Memory
| Max Memory Speed | 2666 MT/s |
|---|---|
| ECC Support | No |
Power and thermals
| TDP | 165 W |
|---|
FAQs
What are the key specifications of the 9th Gen Intel Core i9 9800X?
The 9th Gen Intel Core i9 9800X has a 3.8 GHz base and 4.5 GHz boost clock, 16.5 MB of L3 cache and a 165 W TDP. Socket: FCLGA2066.
Will the 9th Gen Intel Core i9 9800X work with my current setup?
The 9th Gen Intel Core i9 9800X lists CPU Socket is FCLGA2066. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the 9th Gen Intel Core i9 9800X best suited to?
Best suited to: Buyers wanting HEDT platform features at the most accessible entry point in Intel's 9th Gen X-series stack.
What are the drawbacks of the 9th Gen Intel Core i9 9800X?
Not the best fit for: Buyers needing higher core counts, the 9820X, 9920X, and 9960X offer more on the same platform.
Compare and read more
- 7th Gen Intel Core i9-7900X vs 9th Gen Intel Core i9 9800X
- 7th Gen Intel Core i9 7980XE vs 9th Gen Intel Core i9 9800X
- 9th Gen Intel Core i9 9800X vs 9th Gen Intel Core i9-9920X
- 9th Gen Intel Core i9 9800X vs 9th Gen Intel Core i9 9960X
- 9th Gen Intel Core i9 9800X vs 9th Gen Intel Core i9-9980XE
- ECC Memory Explained: Do You Actually Need It?