Ryzen 9 9900X vs Ultra 9 285K
They perform within a few percent of each other at 1080p, and the Ryzen 9 9900X costs about $275 less right now. For the money, the Ryzen 9 9900X is the better buy.
Processor · better value
Ryzen 9 9900X
$604
cheapest new: at PC Case Gear · used about $365
- Cores / threads
- 12C/24T
- Socket
- AM5
- Memory
- DDR5
- Peak power
- 162 W
- Cooler in the box
- No
- Built-in graphics
- Yes
- Released
- 2024
Processor
Core Ultra 9 285K
$879
cheapest new: at Amazon AU · used about $510
- Cores / threads
- 24C/24T
- Socket
- LGA1851
- Memory
- DDR5
- Peak power
- 250 W
- Cooler in the box
- No
- Built-in graphics
- Yes
- Released
- 2024
Average frame rates
Estimated across demanding games at High settings, each tested with an RTX 5090 and 32 GB of fast memory, so the processor is what limits the frame rate.
Cost per frame at 1080p: Ryzen 9 9900X $4 · Ultra 9 285K $5
Game by game at 1080p
| Game | Ryzen 9 9900X | Ultra 9 285K | Difference |
|---|---|---|---|
| Cyberpunk 2077 | 140 | 140 | about the same |
| Black Myth: Wukong | 143 | 143 | about the same |
| Fortnite | 208 | 208 | about the same |
| Counter-Strike 2 | 416 | 416 | about the same |
| Call of Duty: Black Ops 7 | 176 | 176 | about the same |
| Baldur’s Gate 3 | 128 | 128 | about the same |
Which processor should you buy?
- Better value: the Ryzen 9 9900X costs less per frame ($4 vs $5 per fps at 1080p).
- They need different motherboards: the Ryzen 9 9900X uses AM5 and the Ultra 9 285K uses LGA1851.
- For video editing, 3D and other work that uses every core, the Ultra 9 285K is about 29% faster.
See how either processor pairs with your graphics card in the bottleneck checker.
Related comparisons
Frame rates are Rigsmith estimates from its performance indices, not measured benchmarks. Prices are the cheapest in-stock new price at Australian stores as of 12/11/2026, including GST.