S TierCPUs
Intel Core Ultra 9 285K
Intel's flagship Arrow Lake desktop CPU — 24 cores to 5.7 GHz
Why it matters
The Core Ultra 9 285K is Intel's top Arrow Lake desktop processor with 8 Performance cores and 16 Efficient cores totalling 24 cores at up to 5.7 GHz. Arrow Lake resolves the voltage degradation issues that plagued 13th and 14th gen, and introduces Intel's LGA1851 platform with DDR5 and PCIe 5.0 support.
Specifications
Cores / Threads24C / 24T (8P + 16E, no HyperThreading)
ArchitectureArrow Lake (Intel 20A / TSMC N3B)
Boost Clock5.7 GHz (P-core)
L3 Cache40 MB
TDP125W (253W max turbo)
SocketLGA1851
MemoryDDR5
PCIePCIe 5.0 x16
UnlockedYes
Strengths
- 24-core hybrid design with up to 5.7 GHz boost on P-cores — competitive single-thread for build tools
- Arrow Lake resolves the voltage degradation bugs that afflicted 13th/14th gen Intel
- DDR5 support — Intel's most advanced consumer desktop architecture
Trade-offs
- No HyperThreading on any core (Arrow Lake design choice) — 24 cores = 24 threads, reducing MT advantage
- Multi-threaded throughput behind AMD Ryzen 9 9950X (16C/32T beats 24C/24T in most compile benchmarks)
- Requires new LGA1851 motherboard (Z890) — not compatible with older Intel LGA1700 boards
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