Core i9 12900HX vs Ryzen 9 9955HX
Head-to-head specifications
| Metric | Core i9 12900HX | Ryzen 9 9955HX | Difference |
|---|---|---|---|
| Cinebench 2024 single-core | 112 | 134 | -16.4% |
| Cinebench 2024 multi-core | 1,269 | 2,091 | -39.3% |
| Cores | 16 (8P+8E) | 16 | — |
| TDP (base W) | 45 | 55 | — |
- Core i9 12900HX is slower than Ryzen 9 9955HX by 16.4% in single-core and slower by 39.3% in multi-core (Cinebench 2024).
- Core i9 12900HX draws less power (45W vs 55W base TDP).
Verdict: Core i9 12900HX or Ryzen 9 9955HX?
Core i9 12900HX advantages
- Power efficiency (+18%)
Ryzen 9 9955HX advantages
- Single-core speed (+16%)
- Multi-core speed (+39%)
Which should you choose?
- Choose the Core i9 12900HX if you want a cooler, quieter and more power-efficient build.
- Choose the Ryzen 9 9955HX if you mainly game or want snappy everyday responsiveness.
Core i9 12900HX vs Ryzen 9 9955HX: which should you choose?
Core i9 12900HX — 16-core Intel processor (8P+8E) scoring 112 single-core and 1269 multi-core in Cinebench 2024, with a 45 W TDP.
Ryzen 9 9955HX — 16-core AMD processor scoring 134 single-core and 2091 multi-core in Cinebench 2024, with a 55 W TDP.
Core i9 12900HX vs Ryzen 9 9955HX: Ryzen 9 9955HX leads in multi-core performance. Core i9 12900HX is slower than Ryzen 9 9955HX by 16.4% in single-core and slower by 39.3% in multi-core (Cinebench 2024). Core i9 12900HX draws less power (45W vs 55W base TDP).
Gaming and single-threaded work
Games and everyday responsiveness lean on single-core speed. The Ryzen 9 9955HX leads there with a single-core score of 134 versus 112, so it is the marginally better pick for high-refresh gaming — though at typical resolutions the GPU usually decides frame rates.
Content creation and multitasking
For rendering, compilation, video export and other all-core workloads, the Ryzen 9 9955HX is stronger, posting 2,091 multi-core against 1,269 in Cinebench 2024. Its 16 cores give it real headroom for heavy parallel jobs.
Power and platform
The Core i9 12900HX is the more efficient chip at 45 W versus 55 W, which means less heat, quieter cooling and lower running costs under sustained load.
The verdict
Both are credible choices in the processor comparison space; the specification table above lays out every metric so you can weigh the trade-offs that matter to you. Pick the one whose strengths line up with how you will actually use it.
Frequently asked questions
Is the Core i9 12900HX better than the Ryzen 9 9955HX?
Ryzen 9 9955HX is the clearly stronger overall choice, winning most of the dimensions that matter. Core i9 12900HX is slower than Ryzen 9 9955HX by 16.4% in single-core and slower by 39.3% in multi-core (Cinebench 2024).
What is the main difference between the Core i9 12900HX and the Ryzen 9 9955HX?
Core i9 12900HX is slower than Ryzen 9 9955HX by 16.4% in single-core and slower by 39.3% in multi-core (Cinebench 2024). Core i9 12900HX draws less power (45W vs 55W base TDP).
Which should I choose?
Choose the Core i9 12900HX if you want a cooler, quieter and more power-efficient build. Choose the Ryzen 9 9955HX if you mainly game or want snappy everyday responsiveness.
Methodology
Processors are compared on Cinebench 2024 single-core and multi-core scores from published leaderboard results, alongside core configuration (performance + efficiency cores), base TDP, L3 cache, PassMark CPU Mark, 1080p gaming scores and street pricing where measured. Cinebench reflects rendering-style workloads; gaming performance depends heavily on the GPU and the specific title, so treat single-core standing as directional. Figures reflect the leaderboard snapshot on the page date.