Intel Core i5-14600KF vs Intel Core Ultra X9 378H Comparison

Head-to-Head Benchmarks

The benchmark record reveals a surprisingly close contest between the Intel Core i5-14600KF and the Intel Core Ultra X9 378H, despite their very different design philosophies. Across the Cinebench suite, the two processors are virtually inseparable. In Cinebench R15 multicore, the Ultra X9 378H edges ahead with a score of 3281 versus 3280, a delta of 0%. The R20 multicore test shows a similar pattern: 13672 for the Ultra X9 378H against 13668 for the i5-14600KF. Even in R23 multicore, the margin is razor-thin, with the Ultra X9 378H scoring 32553 and the i5-14600KF scoring 32544. Single-core results are equally tight: both chips post identical scores of 462 in R15 and 1929 in R20, while the Ultra X9 378H takes a 1-point lead in R23 single-core with 4595 versus 4594.

The PassMark suite tells a more divergent story. The i5-14600KF dominates in integer math, scoring 125982 against 92603 for the Ultra X9 378H, a commanding 36% advantage. Data compression also favors the desktop chip heavily: 485140 versus 386591, a 25.5% lead. Random string sorting goes to the i5-14600KF by 16.6%, with scores of 52056 and 44648. The multithread test is close, with the i5-14600KF ahead by just 1% (38697 versus 38298).

The Ultra X9 378H fights back decisively in other areas. Floating point math shows a clear win for the mobile chip: 114500 versus 93048, an 18.7% advantage. Physics calculations go to the Ultra X9 378H by 28.1% (3404 versus 2449). Prime number finding is a massive victory for the Ultra X9 378H, scoring 357 versus 161, a 54.9% gap. Data encryption favors the Ultra X9 378H by 7.5% (29840 versus 27608), and extended instructions go to it by 8.1% (31315 versus 28785). Single-thread performance also belongs to the Ultra X9 378H, with 4453 versus 4273, a 4% edge.

Where Each One Wins

The data suggests a clear split along workload types. The i5-14600KF is the stronger choice for integer-heavy tasks and data manipulation. Its 36% lead in integer math and 25.5% advantage in data compression point to strengths in general productivity, database operations, and any workload that processes large amounts of structured data. The 16.6% win in random string sorting reinforces this profile, indicating efficiency in sorting algorithms and text processing. The multithread win, while narrow at 1%, shows the desktop part can hold its own in highly parallel scenarios.

The Ultra X9 378H excels in floating-point and scientific workloads. Its 18.7% advantage in floating point math and 28.1% lead in physics suggest strong vector and SIMD capabilities. The 54.9% win in prime number finding is particularly striking, indicating excellent integer throughput in algorithmic loops. Data encryption and extended instructions also favor the Ultra X9 378H, making it suitable for security-related tasks and workloads that leverage newer instruction sets. The 4% single-thread win is notable for lightly threaded applications.

The overall win count favors the Ultra X9 378H with 11 wins against 6 for the i5-14600KF. However, the magnitude of the i5-14600KF's wins in integer math and data compression is substantial, making the choice highly dependent on the specific workload mix.

Architecture Differences

The two processors come from fundamentally different lineages. The i5-14600KF is built on Raptor Lake architecture (Raptor Lake-R codename), part of the Core 14th Gen family. It uses a 10 nm process node from Intel and features 14 cores with 20 threads. The cache hierarchy consists of 80 KB L1 per core, 2 MB L2 per core, and 24 MB shared L3. This desktop part supports both DDR4 and DDR5 memory in a dual-channel configuration, and it includes ECC memory support. It connects via PCIe Gen 5 with 16 lanes from the CPU. The socket is Intel Socket 1700, and the chip has an unlocked multiplier for overclocking. Its base clock is 3.50 GHz with a boost of 5.30 GHz, and it carries a TDP of 125 W. The die size is listed at 257 mm².

The Ultra X9 378H belongs to the Core Ultra Series 3 with Panther Lake codename (Panther Lake-H generation). It is manufactured on a 3 nm process, also by Intel. This mobile chip has 16 cores but only 16 threads, indicating no hyperthreading. The cache is substantially different: 192 KB L1 per core, 2.5 MB L2 per core, and 18 MB shared L3. Memory support is limited to LPDDR5X in a dual-channel configuration, with a rated memory bandwidth of 153.6 GB/s. ECC memory is not supported. PCIe connectivity is Gen 5 but only 4 lanes from the CPU. The socket is Intel BGA 2540, and the multiplier is locked. Base clock is 2.00 GHz with a boost of 5.00 GHz, and TDP is dramatically lower at 25 W. The Ultra X9 378H includes integrated graphics in the form of Arc B390, whereas the i5-14600KF has no integrated graphics listed.

The release dates highlight the generational gap: the i5-14600KF launched in October 2023, while the Ultra X9 378H is dated April 2026. The launch MSRP for the i5-14600KF was $294; no launch MSRP is recorded for the Ultra X9 378H.

The Verdict

The recorded data paints a nuanced picture. For desktop users building a system around a Socket 1700 motherboard with DDR4 or DDR5 memory, the i5-14600KF offers a 36% advantage in integer math and a 25.5% lead in data compression, making it the superior choice for general computing, file handling, and integer-heavy applications. Its 14 cores and 20 threads provide strong multithreaded performance, and the unlocked multiplier allows tuning for those who adjust clock speeds. The 125 W TDP indicates a need for robust cooling, but the performance is there for demanding workloads.

For mobile users or those prioritizing power efficiency, the Ultra X9 378H is the clear winner. Its 25 W TDP versus 125 W is a dramatic difference, and it still manages to win 11 of 17 head-to-head benchmarks. The 54.9% lead in prime number finding and 28.1% lead in physics make it attractive for scientific and computational workloads. The 4% single-thread advantage and integrated Arc B390 graphics add to its appeal for portable systems. The 3 nm process node and Panther Lake architecture show Intel's progression toward greater efficiency.

The data suggests that the Ultra X9 378H is not merely a low-power alternative but a genuinely competitive processor that outperforms the desktop chip in many tests. The near-identical Cinebench scores indicate that for rendering workloads, the choice between the two matters little. The decision ultimately hinges on the specific application mix and platform requirements. Desktop users with integer-heavy workloads should favor the i5-14600KF; those needing floating-point performance, efficiency, or a mobile form factor should choose the Ultra X9 378H.

FAQ

Q: Which processor has a higher average benchmark score?

A: The i5-14600KF has an average benchmark score of 49394, while the Ultra X9 378H scores 47468. The i5-14600KF sits at the 90th percentile of all CPUs, while the Ultra X9 378H is at the 89th percentile.

Q: How do the two compare in Cinebench R23 multicore?

A: The Ultra X9 378H scores 32553 versus 32544 for the i5-14600KF, a difference of 0%. They are effectively tied in this rendering test.

Q: Which processor is better for data compression?

A: The i5-14600KF is significantly better, scoring 485140 versus 386591 for the Ultra X9 378H, representing a 25.5% advantage.

Q: What is the difference in TDP between the two?

A: The i5-14600KF has a TDP of 125 W, while the Ultra X9 378H has a TDP of 25 W. The Ultra X9 378H consumes substantially less power.

Q: Does the Ultra X9 378H support ECC memory?

A: No, ECC memory is not supported on the Ultra X9 378H. The i5-14600KF does support ECC memory.

Q: Which processor has better single-thread performance in PassMark?

A: The Ultra X9 378H scores 4453 in PassMark single-thread, compared to 4273 for the i5-14600KF, a 4% advantage for the Ultra X9 378H.

Specification Differences

| Specification | Intel Core i5-14600KF | Intel Core Ultra X9 378H |

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

| Series | Core 14th Gen | Core Ultra Series 3 |

| Codename | Raptor Lake-R | Panther Lake |

| Generation | Core i5 (Raptor Lake Refresh) | Ultra X9 (Panther Lake-H) |

| Process Node | 10 nm | 3 nm |

| Cores | 14 | 16 |

| Threads | 20 | 16 |

| Base Clock | 3.50 GHz | 2.00 GHz |

| Boost Clock | 5.30 GHz | 5.00 GHz |

| TDP | 125 W | 25 W |

| Socket | Intel Socket 1700 | Intel BGA 2540 |

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

| L2 Cache | 2 MB (per core) | 2.5 MB (per core) |

| L3 Cache | 24 MB (shared) | 18 MB (shared) |

| Memory Support | DDR4, DDR5 | LPDDR5X |

| Memory Bandwidth | Not listed | 153.6 GB/s |

| ECC Memory | Yes | No |

| PCIe | Gen 5, 16 Lanes (CPU only) | Gen 5, 4 Lanes (CPU only) |

| Integrated Graphics | None | Arc B390 |

| Market Segment | Desktop | Mobile |

| Release Date | 2023-10-16 | 2026-04-03 |

| Launch MSRP | $294 | Not listed |

| Multiplier Unlocked | Yes | No |

| Die Size | 257 mm² | Not listed |