Intel Core i9-14900K vs Intel Core Ultra 9 285K Comparison

Head-to-Head Benchmarks

The benchmark data delivers a clear verdict: the Intel Core Ultra 9 285K wins 17 of 19 head-to-head tests, with the Intel Core i9-14900K claiming only two. The magnitude of those wins matters as much as their count. In Cinebench R20 multi-core, the Ultra 9 285K scores 24,003 against 20,793, a 15.4% advantage. Geekbench multi-core shows an even larger gap: 26,702 versus 21,697, a 23.1% lead. Single-core performance also favors the newer part, with Cinebench R20 single-core at 3,388 versus 2,935, again a 15.4% delta.

The most dramatic separation appears in PassMark workloads. The Ultra 9 285K finds prime numbers at a score of 541 versus 231, a 134.2% advantage. Floating point math runs 46.6% ahead (224,324 versus 152,975). Extended instructions score 62,277 versus 45,154, a 37.9% gap. Data encryption shows 57,745 versus 46,813, a 23.4% improvement. Physics testing lands at 3,938 versus 3,140, a 25.4% margin. Even random string sorting, often memory-latency sensitive, favors the Ultra 9 285K by 9.1% (94,927 versus 86,971).

Cinebench R23 results tell a slightly tighter story. Multi-core: 42,522 versus 39,399.5, a 7.9% lead. Single-core: 2,377 versus 2,262.5, a 5.1% difference. R15 multi-core shows 6,494 versus 6,103, only 6.4% apart. The Ultra 9 285K's wins are consistent but not uniform in size; some tests show a modest edge, others a landslide.

The i9-14900K's two victories are narrow and specific. PassMark data compression: 792,694 versus 790,052, a 0.3% margin. PassMark integer math: 210,622 versus 172,379, a substantial 18.2% lead. These are real wins, but they stand isolated. The integer math result is particularly notable because it reverses the overall trend, suggesting the older architecture retains strength in certain scalar integer workloads. Data compression is essentially a tie, with the i9-14900K edging ahead by a negligible margin.

The average benchmark score reflects the overall balance: the Ultra 9 285K sits at 83,807, the i9-14900K at 79,097. The database places the Ultra 9 285K in the 96th percentile of all CPUs, the i9-14900K in the 95th. Neither part is slow, but the data shows the Ultra 9 285K as the faster processor across almost every measured category.

FAQ

Q: Which processor is faster in multi-threaded workloads?

A: The Intel Core Ultra 9 285K wins every multi-threaded benchmark in the head-to-head set. Cinebench R20 multi-core shows a 15.4% lead (24,003 versus 20,793), Geekbench multi-core shows a 23.1% lead (26,702 versus 21,697), and PassMark multithread shows a 14.6% lead (67,260 versus 58,674).

Q: Does the i9-14900K win any benchmark at all?

A: Yes, two tests. PassMark data compression shows a 0.3% edge (792,694 versus 790,052), and PassMark integer math shows an 18.2% advantage (210,622 versus 172,379). All other 17 head-to-head tests go to the Ultra 9 285K.

Q: How large is the single-core performance gap?

A: The Ultra 9 285K leads in every single-core test. Cinebench R15 single-core: 359 versus 324.5, a 10.6% margin. R20 single-core: 3,388 versus 2,935, a 15.4% margin. R23 single-core: 2,377 versus 2,262.5, a 5.1% margin. Geekbench single-core: 2,870 versus 2,655, an 8.1% margin. PassMark single-thread: 5,087 versus 4,697, an 8.3% margin.

Q: What is the biggest single performance difference between the two?

A: PassMark find prime numbers. The Ultra 9 285K scores 541, the i9-14900K scores 231, a 134.2% advantage. This is by far the largest delta in the entire comparison, indicating a major architectural improvement in that specific workload.

Q: Are both processors in the same performance percentile?

A: No. The Ultra 9 285K ranks in the 96th percentile of all CPUs, while the i9-14900K ranks in the 95th. The average benchmark scores are 83,807 for the Ultra 9 285K and 79,097 for the i9-14900K.

Q: Which processor has a higher boost clock?

A: The i9-14900K has a boost clock of 6.00 GHz, while the Ultra 9 285K boosts to 5.70 GHz. Despite the lower boost clock, the Ultra 9 285K still wins the majority of single-core tests, indicating that clock speed alone does not determine performance.

Architecture Differences

The two processors represent distinct design generations. The Ultra 9 285K uses the Arrow Lake architecture on a 3 nm process built by TSMC, with a die size of 243 mm² and 17,800 million transistors. The i9-14900K uses Raptor Lake on a 10 nm process built by Intel, with a die size of 257 mm² and no transistor count listed in the database. The process node difference is substantial: 3 nm versus 10 nm, which explains much of the efficiency and per-clock gains.

Core and thread counts differ despite both having 24 cores. The Ultra 9 285K has 24 threads, meaning each core handles one thread. The i9-14900K has 32 threads, meaning eight of its cores support hyper-threading. This is a critical architectural split: the newer part abandons simultaneous multithreading entirely, while the older part relies on it to reach 32 threads. The benchmark results show that 24 threads without SMT outperform 32 threads with SMT in most workloads.

Cache hierarchies also diverge. The Ultra 9 285K has 192 KB of L1 cache per core and 3 MB of L2 per core, with 36 MB of shared L3. The i9-14900K has 80 KB of L1 per core and 2 MB of L2 per core, also with 36 MB of shared L3. The Ultra 9 285K's larger per-core caches likely contribute to its single-core wins.

Integrated graphics differ as well. The Ultra 9 285K carries Arc Xe-LPG Graphics with 64 execution units. The i9-14900K uses UHD Graphics 770. Both are integrated solutions, but the Arc-branded GPU is a newer design. Memory support also differs: the Ultra 9 285K supports DDR5 only, while the i9-14900K supports both DDR4 and DDR5. The Ultra 9 285K lists memory bandwidth of 102.4 GB/s; the i9-14900K has no bandwidth figure in the database.

PCIe lane counts differ. The Ultra 9 285K provides Gen 5 with 20 lanes from the CPU. The i9-14900K provides Gen 5 with 16 lanes from the CPU. Both support ECC memory. Both have unlocked multipliers. The sockets are incompatible: Intel Socket 1851 for the Ultra 9 285K, Intel Socket 1700 for the i9-14900K.

Specification Differences

| Specification | Intel Core Ultra 9 285K | Intel Core i9-14900K |

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

| Architecture | Arrow Lake | Raptor Lake |

| Codename | Arrow Lake-S | Raptor Lake-R |

| Process node | 3 nm | 10 nm |

| Foundry | TSMC | Intel |

| Transistors | 17,800 million | Not listed |

| Die size | 243 mm² | 257 mm² |

| Threads | 24 | 32 |

| Base clock | 3.70 GHz | 3.20 GHz |

| Boost clock | 5.70 GHz | 6.00 GHz |

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

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

| Memory support | DDR5 only | DDR4, DDR5 |

| Memory bandwidth | 102.4 GB/s | Not listed |

| PCIe lanes | Gen 5, 20 lanes | Gen 5, 16 lanes |

| Integrated graphics | Arc Xe-LPG 64EU | UHD Graphics 770 |

| Socket | Intel Socket 1851 | Intel Socket 1700 |

| Release date | 2024-10-23 | 2023-10-16 |

| Part number | SRQD5 | SRN48 |

Both share the same core count (24), TDP (125 W), L3 cache (36 MB shared), memory bus (dual-channel), ECC support, unlocked multiplier, desktop market segment, active production status, and launch MSRP of $589.

Where Each One Wins

The Ultra 9 285K is the clear winner in rendering and compute-heavy workloads. Cinebench R15, R20, and R23 multi-core tests all go to the Ultra 9 285K, with margins from 6.4% to 15.4%. Geekbench multi-core shows a 23.1% advantage. PassMark physics, floating point math, extended instructions, data encryption, find prime numbers, random string sorting, and multithread all favor the Ultra 9 285K by margins ranging from 9.1% to 134.2%. Single-core performance is uniformly better on the Ultra 9 285K across Cinebench, Geekbench, and PassMark single-thread tests.

The i9-14900K wins exactly two categories. PassMark integer math is its strongest case, with an 18.2% lead. This matters for workloads that are dominated by integer arithmetic, such as certain database operations, compression algorithms, or scripting workloads. PassMark data compression shows a 0.3% edge, effectively a statistical tie, but it still counts as a win for the i9-14900K. The 32 threads give it an advantage in scenarios where thread count directly translates to parallel integer throughput.

The data compression result deserves special attention. The i9-14900K scores 792,694, the Ultra 9 285K scores 790,052. The difference is only 0.3%, well within typical run-to-run variance. Users should treat this as a tie in practice. The integer math win, however, is decisive and repeatable: 210,622 versus 172,379 is an 18.2% gap that cannot be dismissed as noise.

The Verdict

The Intel Core Ultra 9 285K is the faster processor in nearly every measured dimension. It wins 17 of 19 head-to-head benchmarks, including all Cinebench and Geekbench tests. Its single-core advantages range from 5.1% to 15.4%, and its multi-core advantages range from 6.4% to 23.1%. The average benchmark score of 83,807 versus 79,097 places it in the 96th percentile of all CPUs, one point above the i9-14900K's 95th percentile. For rendering tasks, scientific computing, encryption workloads, and general productivity, the data points decisively to the Ultra 9 285K.

The i9-14900K remains relevant for a narrow but real set of workloads. Its 18.2% lead in PassMark integer math makes it the pick for integer-heavy applications. Its 32 threads provide headroom in scenarios that can exploit them, though the benchmark evidence shows this rarely translates to a win. The data compression tie means users who care about that specific task will not lose anything by choosing either processor.

Architecturally, the Ultra 9 285K represents a clean break: 3 nm process, TSMC foundry, 24 threads without SMT, larger per-core caches, and a new socket. The i9-14900K is the last of the Raptor Lake line: 10 nm process, Intel foundry, 32 threads with SMT, smaller per-core caches, and the LGA 1700 socket. The benchmark data shows that the newer design wins despite having fewer threads and a lower boost clock. The Ultra 9 285K's 5.70 GHz boost clock trails the i9-14900K's 6.00 GHz, yet it still wins every single-core test. This indicates that architectural efficiency, not raw clock speed, drives the performance advantage.

Users upgrading from an existing LGA 1700 platform should note the socket change. The Ultra 9 285K requires Intel Socket 1851, so a new motherboard is mandatory. The i9-14900K fits existing LGA 1700 boards. For new builds, the Ultra 9 285K offers better performance in almost all categories. For users with a working LGA 1700 system who need integer math throughput, the i9-14900K remains a defensible choice. Otherwise, the database's 17-to-2 win count is the summary that matters: the Ultra 9 285K is the better processor.