Intel · Core Ultra 9 · 2025 · LGA1851
The Intel Core Ultra 9 285 is a desktop processor with 24 cores (8 Performance-cores and 16 Efficiency-cores), released in 2025 at an MSRP of $559. It is part of the Core Ultra 9 lineup, using the 200 Series platform, and fits the LGA1851 socket. Internally, it is built on the "Arrow Lake" architecture. Only the 8 P-cores support Hyper-Threading, while the 16 E-cores handle a single thread each, together yielding 24 threads: the P-cores tackle latency-sensitive and lightly-threaded work, while the E-cores take on background and highly parallel tasks. The Core Ultra 9 285 has a base clock of 2.5 GHz and can boost up to 5.6 GHz depending on workload and thermal headroom. Intel manufactures the "Arrow Lake" silicon on a Intel 3 process node. Its multiplier is locked, so any overclocking has to come from raising the base clock rather than the multiplier. This processor supports DDR5 memory. With a TDP of 65W, the Core Ultra 9 285 is an efficient chip suitable for modest cooling solutions. Integrated graphics are provided by the Intel Graphics 2000 solution, so a discrete GPU is not required for display output. The cache hierarchy consists of 80KB/core of L1, 40MB of L2, and 36MB of L3 cache.
65W non-K locked variant. Same 24-core config as 285K but significantly lower base clocks suited for efficiency-focused builds.
| Brand | Intel |
|---|---|
| Family | Core Ultra 9 |
| Series | 200 Series |
| Architecture | Arrow Lake |
| Type | Desktop |
| Launch year | 2025 |
| Cores | 24 (8P + 16E) |
| Threads | 24 |
| Base clock | 2.5 GHz |
| Boost clock | 5.6 GHz |
| L1 cache | 80KB/core |
| L2 cache | 40MB |
| L3 cache | 36MB |
| TDP | 65W |
| Socket | LGA1851 |
| Process | Intel 3 |
| Memory type | DDR5 |
| Integrated graphics | Intel Graphics 2000 |
| Chipsets | Z890, B860, H810 |
| Launch MSRP | $559 |
| Part number | BX80768285 |
| OEM / tray part number | AT8076806418 |