Intel Core i9-14900KF vs Intel Core Ultra 9 285HX Comparison

The Verdict

The recorded data presents a clear split between two very different Intel designs. The Intel Core i9-14900KF, a desktop part from the Core 14th Gen series, wins 11 of the 17 head-to-head benchmarks. The Intel Core Ultra 9 285HX, a mobile part from Core Ultra Series 2, wins the remaining 6. The average benchmark score places the 14900KF at 79,371, which is 4.2% higher than the 285HX’s 76,155. Both processors sit at the 95th percentile among all CPUs in the database, indicating that either choice represents top-tier performance, but the distribution of wins matters more than the overall average.

For a desktop builder with a fixed power budget and access to a dedicated GPU, the i9-14900KF is the straightforward pick. It dominates in multi-threaded render workloads, integer math, and single-threaded response. For a mobile workstation or laptop user, the Core Ultra 9 285HX offers a compelling counterpoint: it wins in encryption, extended instructions, prime number finding, floating-point math, and physics simulations, while consuming far less power (55W TDP versus 125W). The data does not declare a universal winner; it declares two winners for two different physical environments.

Where Each One Wins

The i9-14900KF builds its case on raw multi-core throughput and classic single-core speed. In Cinebench R23 multi-core, it scores 49,370 against 36,429.5 for the 285HX, a 35.5% lead. The same pattern appears in Cinebench R20 multi-core, where the 14900KF’s 20,735 edges out 20,236 by 2.5%. In integer math, the desktop chip posts 209,125 versus 155,076, a 34.9% advantage. Data compression also favors the 14900KF: 785,831 against 631,885, a 24.4% gap. Random string sorting goes to the 14900KF by 12.1%, and multithread performance overall favors it by 2.6% (58,405 versus 56,902).

The Core Ultra 9 285HX wins in workloads that respond to its newer architecture and higher per-core cache. Floating-point math shows a 22.1% win for the mobile chip (194,998 versus 151,918). Prime number finding is a 49.8% win (460 versus 231). Extended instructions go to the 285HX by 8.8%. Data encryption is 4.4% faster on the 285HX. Physics simulation favors the 285HX by 9.1%. Even in Cinebench R15 multi-core, the 285HX wins by 12% (5,656.5 versus 4,976), which is notable because the newer chip has fewer threads (24 versus 32). The 285HX also wins the single-core R15 test? No, that is a 14900KF win; the R15 single-core score for the 285HX is 323.5, far below the 14900KF’s 702.

Architecture Differences

The two chips come from different foundries and process nodes. The i9-14900KF uses Raptor Lake architecture on Intel’s 10 nm node, with a die size of 257 mm². The Core Ultra 9 285HX uses Arrow Lake architecture on TSMC’s 3 nm node, with a die size of 243 mm² and 17,800 million transistors. Core counts are identical at 24, but thread counts differ: 32 for the 14900KF, 24 for the 285HX. This means the 14900KF uses Hyper-Threading, while the 285HX does not.

Cache layouts diverge significantly. The 14900KF has 80 KB of L1 per core and 2 MB of L2 per core. The 285HX has 192 KB of L1 per core and 3 MB of L2 per core. Both share 36 MB of L3, so the total cache hierarchy is more generous on the 285HX per-core, which helps explain its wins in floating-point and encryption tasks. Clock speeds also differ: the 14900KF runs at 3.20 GHz base and 6.00 GHz boost, while the 285HX runs at 2.80 GHz base and 5.50 GHz boost. The desktop chip’s higher boost clock correlates with its single-core wins.

Memory support differs: the 14900KF supports DDR4 and DDR5, while the 285HX supports only DDR5. The 285HX has a listed memory bandwidth of 102.4 GB/s; the 14900KF has no recorded bandwidth figure. Both use dual-channel memory buses. PCIe lanes differ: the 14900KF provides Gen 5 with 16 CPU lanes, while the 285HX provides Gen 5 with 20 CPU lanes. The 285HX includes integrated Arc Xe-LPG Graphics with 64 execution units; the 14900KF has no integrated graphics listed. Sockets are incompatible: Intel Socket 1700 for the 14900KF, Intel BGA 2114 for the 285HX.

FAQ

Q: Which processor is faster in Cinebench R23 multi-core?

A: The i9-14900KF scores 49,370, which is 35.5% higher than the Core Ultra 9 285HX’s 36,429.5.

Q: Does the Core Ultra 9 285HX have any multi-core wins?

A: Yes, in Cinebench R15 multi-core the 285HX scores 5,656.5, beating the 14900KF’s 4,976 by 12%. It also wins in PassMark physics (3,476 versus 3,159) and floating-point math (194,998 versus 151,918).

Q: What is the thread count difference?

A: The i9-14900KF has 32 threads, while the Core Ultra 9 285HX has 24 threads. Both have 24 cores.

Q: Which chip has a higher boost clock?

A: The i9-14900KF boosts to 6.00 GHz, while the Core Ultra 9 285HX boosts to 5.50 GHz. Base clocks are 3.20 GHz and 2.80 GHz, respectively.

Q: Do both chips support ECC memory?

A: Yes, both list ECC memory as supported. The 14900KF supports DDR4 and DDR5, while the 285HX supports DDR5 only.

Q: Which chip has more PCIe lanes?

A: The Core Ultra 9 285HX has 20 Gen 5 lanes (CPU only), while the i9-14900KF has 16 Gen 5 lanes (CPU only).

Head-to-Head Benchmarks

The largest single victory belongs to the i9-14900KF in Cinebench R23 single-core, where it scores 6,969 against 2,187.5, a 218.6% margin. This is a massive gap, driven by the 14900KF’s 6.00 GHz boost clock and the 285HX’s lower 5.50 GHz boost, but the magnitude still surprises. Cinebench R15 single-core shows a similar story: 702 versus 323.5, a 117% lead for the 14900KF. These single-core wins are not marginal; they are categorical.

The 14900KF also wins Cinebench R23 multi-core by 35.5% (49,370 versus 36,429.5) and Cinebench R20 multi-core by 2.5% (20,735 versus 20,236). The smaller margin in R20 suggests the 285HX’s architecture scales better in that specific workload, but the R23 result is more decisive. PassMark integer math goes to the 14900KF by 34.9% (209,125 versus 155,076), and data compression by 24.4% (785,831 versus 631,885). Random string sorting favors the 14900KF by 12.1% (86,564 versus 77,196). PassMark multithread is close: 58,405 versus 56,902, a 2.6% edge for the desktop chip. Single-thread PassMark is also close: 4,685 versus 4,618, a 1.5% lead for the 14900KF.

The Core Ultra 9 285HX’s largest win is in PassMark find prime numbers, where it scores 460 against 231, a 49.8% advantage. This workload likely benefits from the 285HX’s larger L2 cache (3 MB per core versus 2 MB per core) and newer TSMC node. Floating-point math is the second-largest win: 194,998 versus 151,918, a 22.1% margin. Physics simulation goes to the 285HX by 9.1% (3,476 versus 3,159). Extended instructions show an 8.8% win (49,148 versus 44,839). Data encryption is 4.4% faster (48,567 versus 46,416). Cinebench R15 multi-core is the only render test where the 285HX wins, posting 5,656.5 against 4,976, a 12% lead, despite having 8 fewer threads.

Specification Differences

| Specification | Intel Core i9-14900KF | Intel Core Ultra 9 285HX |

|---|---|---|

| Series | Core 14th Gen | Core Ultra Series 2 |

| Architecture | Raptor Lake | Arrow Lake |

| Process Node | 10 nm (Intel) | 3 nm (TSMC) |

| Transistors | Not recorded | 17,800 million |

| Die Size | 257 mm² | 243 mm² |

| Cores | 24 | 24 |

| Threads | 32 | 24 |

| Base Clock | 3.20 GHz | 2.80 GHz |

| Boost Clock | 6.00 GHz | 5.50 GHz |

| TDP | 125 W | 55 W |

| Socket | Intel Socket 1700 | Intel BGA 2114 |

| L1 Cache | 80 KB (per core) | 192 KB (per core) |

| L2 Cache | 2 MB (per core) | 3 MB (per core) |

| L3 Cache | 36 MB (shared) | 36 MB (shared) |

| Memory Support | DDR4, DDR5 | DDR5 |

| Memory Bandwidth | Not recorded | 102.4 GB/s |

| PCIe | Gen 5, 16 Lanes (CPU only) | Gen 5, 20 Lanes (CPU only) |

| Integrated Graphics | None | Arc Xe-LPG Graphics 64EU |

| Market Segment | Desktop | Mobile |

| Release Date | 2023-10-16 | 2025-01-12 |

| Launch MSRP | $564 | Not recorded |

| Multiplier Unlocked | Yes | Yes |

| ECC Memory | Yes | Yes |

The TDP difference is stark: 125 W for the desktop chip versus 55 W for the mobile chip. This explains why the 285HX can win certain workloads despite lower clocks and fewer threads; it is designed for efficiency within a thermal envelope. The 285HX also has a more recent release date by over a year, but the 14900KF remains the higher average performer in the database. Both chips are active production parts. The 14900KF’s launch MSRP was $564, while the 285HX has no recorded launch price.