Intel Core i9-14900K vs Intel Core Ultra 7 265K Comparison

The Intel Core Ultra 7 265K and Intel Core i9-14900K are both flagship desktop processors, but they take fundamentally different architectural routes. The Ultra 7 265K wins 14 of 17 head-to-head benchmark comparisons, yet its average benchmark score of 79102 trails the i9-14900K's 79824 by 0.9%. Both sit in the 97th percentile of all CPUs, and the data shows a clear split: the Ultra 7 dominates in single-thread, floating-point, and extended-instruction workloads, while the i9-14900K takes compression and integer math.

Head-to-Head Benchmarks

The biggest margin in this matchup belongs to the Ultra 7 265K in PassMark's find prime numbers test, where it scores 495 against the i9-14900K's 231 — a 114.3% advantage. Floating point math also favors the Ultra 7 by 24.2% (190032 vs 152975), and physics simulation is 21.8% higher (3826 vs 3140). Extended instructions come in 21% ahead (54620 vs 45154), and even single-thread performance is 4.4% better (4904 vs 4697). The Ultra 7 also leads in data encryption by 3.3% (48380 vs 46813).

The i9-14900K fights back in three specific workloads. Integer math shows a 31.9% lead for the i9 (210622 vs 143387), data compression is 15.7% higher (792694 vs 668420), and random string sorting wins by 7.9% (86971 vs 80132). In Cinebench R23, the Ultra 7 edges out a 0.3% win in both multi-core (50009 vs 49872) and single-core (7060 vs 7040). The same 0.3% margin appears in PassMark multithread (58838 vs 58674). Across all Cinebench versions (R15, R20, R23), the Ultra 7 takes every test by exactly 0.3%, while the i9-14900K's three wins are all in PassMark integer-oriented tests.

FAQ

Q: Which CPU has higher single-thread performance?

A: The Ultra 7 265K wins PassMark's single-thread test by 4.4% (4904 vs 4697). It also leads in Cinebench R23 single-core by 0.3% (7060 vs 7040).

Q: How do they compare in multi-threaded workloads despite the i9 having more threads?

A: The Ultra 7 265K wins Cinebench R23 multi-core by 0.3% (50009 vs 49872) and PassMark multithread by 0.3% (58838 vs 58674), even though the i9-14900K has 32 threads versus 20.

Q: Which CPU supports DDR4 memory?

A: Only the i9-14900K supports both DDR4 and DDR5; the Ultra 7 265K is DDR5-only.

Q: What about PCIe lanes?

A: The Ultra 7 265K has 20 Gen5 lanes, while the i9-14900K has 16 Gen5 lanes.

Q: What are the launch MSRPs?

A: The Ultra 7 265K has a launch MSRP of $394, and the i9-14900K has a launch MSRP of $589.

Q: Which has a smaller manufacturing process?

A: The Ultra 7 265K uses a 3nm TSMC process, while the i9-14900K uses Intel's 10nm node.

The Verdict

If the workload leans toward floating-point math, physics simulation, encryption, or single-threaded applications, the Ultra 7 265K is the stronger pick. It also carries a lower launch MSRP ($394 vs $589). For integer-heavy tasks such as data compression and random string sorting, the i9-14900K holds a clear advantage, and its higher average benchmark score (79824 vs 79102) reflects that. The i9-14900K offers more threads (32 vs 20) and a higher boost clock (6.00 vs 5.50), but it loses the multi-threaded benchmarks by a hair. The data suggests the Ultra 7 is the more efficient performer in most tests, while the i9-14900K remains relevant for specific integer workloads.

Specification Differences

| Specification | Intel Core Ultra 7 265K | Intel Core i9-14900K |

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

| Cores | 20 | 24 |

| Threads | 20 | 32 |

| Base clock | 3.90 GHz | 3.20 GHz |

| Boost clock | 5.50 GHz | 6.00 GHz |

| Socket | Intel Socket 1851 | Intel Socket 1700 |

| Process node | 3 nm | 10 nm |

| Foundry | TSMC | Intel |

| Die size | 243 mm² | 257 mm² |

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

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

| L3 cache | 30 MB (shared) | 36 MB (shared) |

| Memory support | DDR5 | DDR4, DDR5 |

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

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

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

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

| Launch MSRP | $394 | $589 |

| Part number | SRQCW | SRN48 |

Architecture Differences

The Ultra 7 265K is built on Arrow Lake using a 3nm process at TSMC, while the i9-14900K uses Raptor Lake on Intel's 10nm node. The Ultra 7 has 20 cores and 20 threads, indicating no simultaneous multithreading, whereas the i9-14900K has 24 cores and 32 threads, using Hyper-Threading. Cache layout differs: the Ultra 7 provides 192 KB L1 and 3