Intel Core i9-14900 vs Intel Core Ultra X9 388H Comparison

Head-to-Head Benchmarks

The benchmark data shows a clear overall winner in the Intel Core i9-14900, which takes 15 of the 17 recorded head-to-head tests. The most decisive victories come in heavily multithreaded workloads. In Cinebench R23 multi-core, the i9-14900 scores 31,070 against the Core Ultra X9 388H’s 18,911, a 64.3% advantage. Cinebench R15 multi-core shows a similar gap: 4,793 versus 2,955, a 62.2% lead. The PassMark integer math test is the largest single delta, with the i9-14900 scoring 175,010 against 90,882, a 92.6% margin.

The desktop processor also dominates in data compression, scoring 550,271 versus 361,763, a 52.1% lead. Random string sorting goes to the i9-14900 by 38.7% (61,060 versus 44,010). PassMark multi-thread shows a 21.1% advantage (44,578 versus 36,811), and Cinebench R20 multi-core is 21.4% in favor of the i9-14900 (15,910 versus 13,101).

Single-core results are much closer. The i9-14900 wins PassMark single-thread by just 1% (4,323 versus 4,280). Cinebench R23 single-core is nearly identical, with the i9-14900 at 2,212 and the Ultra X9 at 2,200.5, a 0.5% margin. Cinebench R15 single-core is a 1.8% win for the i9-14900 (315 versus 309.5). Cinebench R20 single-core is a 21.4% win for the i9-14900 (2,245 versus 1,849), which is the largest single-core gap recorded.

The Core Ultra X9 388H wins only two tests. PassMark find prime numbers shows a 47.5% advantage for the mobile chip (358 versus 188). PassMark physics also goes to the Ultra X9 by 22.9% (3,226 versus 2,486). These are the only recorded benchmarks where the mobile part leads.

The i9-14900 also wins PassMark data encryption by 17.7% (33,540 versus 28,490), extended instructions by 2.3% (30,624 versus 29,943), and floating point math by 6.9% (120,262 versus 112,550). The overall average benchmark score reflects this: the i9-14900 sits at 58,115, while the Ultra X9 is at 44,466.

Where Each One Wins

The Intel Core i9-14900 is the stronger choice for any workload that scales with core count or thread count. Its 24 cores and 32 threads give it a massive parallel throughput advantage, visible in the 64.3% lead in Cinebench R23 multi-core and the 92.6% lead in integer math. Content creation, 3D rendering, video encoding, and heavy compilation tasks all fall into this category. The data compression score of 550,271 confirms it excels at archiving and file-handling tasks. The 21.4% lead in Cinebench R20 multi-core reinforces this pattern.

The Core Ultra X9 388H wins in two specific areas. Prime number finding (358 versus 188) suggests its architecture handles certain integer-heavy, low-thread-count operations more efficiently. The physics score (3,226 versus 2,486) indicates an advantage in simulation or constraint-based workloads that may not scale perfectly across many threads. These wins are narrow in scope, but they are real and repeatable in the recorded data.

For single-threaded performance, the two are effectively tied. The i9-14900 leads by 0.5% in Cinebench R23 single-core and by 1% in PassMark single-thread. The Ultra X9 nearly matches it, which is notable given the mobile chip runs at a lower base clock (2.10 GHz versus 2.00 GHz) and a lower boost clock (5.10 GHz versus 5.80 GHz). The 3 nm process node likely compensates for the clock deficit in lightly threaded work.

The i9-14900 also dominates in memory bandwidth-sensitive tasks. Its PassMark multi-thread score of 44,578 versus 36,811 (21.1% lead) and random string sorting at 61,060 versus 44,010 (38.7% lead) both point to strong memory subsystem performance. The Ultra X9 has a higher recorded memory bandwidth (153.6 GB/s), but that does not translate into wins in these specific tests.

Architecture Differences

The two processors come from different Intel families and are built for different market segments. The i9-14900 is a Raptor Lake-R desktop part on the Intel Socket 1700 platform, while the Core Ultra X9 388H is a Panther Lake-H mobile part on Intel BGA 2540. The desktop chip uses the Raptor Lake architecture with a 10 nm process node, while the mobile chip uses the Panther Lake architecture on a 3 nm node. Both are fabricated by Intel.

Core counts differ significantly. The i9-14900 has 24 cores and 32 threads, while the Ultra X9 has 16 cores and 16 threads. The Ultra X9 does not support Hyper-Threading, which explains its thread count matching its core count. The desktop chip has a larger L3 cache at 36 MB shared, versus 18 MB shared on the mobile part. Per-core L1 and L2 caches are larger on the Ultra X9: 192 KB L1 per core versus 80 KB, and 3 MB L2 per core versus 2 MB. The total L2 cache would be 48 MB on the Ultra X9 versus 48 MB on the i9-14900, but the recorded data only lists per-core values.

Clock speeds differ as well. The i9-14900 has a base clock of 2.00 GHz and a boost clock of 5.80 GHz. The Ultra X9 has a base of 2.10 GHz and boost of 5.10 GHz. The desktop chip has a TDP of 65 watts, while the mobile chip draws 25 watts. The i9-14900 supports DDR4 and DDR5 memory in dual-channel mode, while the Ultra X9 supports LPDDR5X, also dual-channel, with a recorded bandwidth of 153.6 GB/s. The i9-14900 supports ECC memory; the Ultra X9 does not.

PCIe lanes also differ. The i9-14900 provides Gen 5 with 16 lanes (CPU only), while the Ultra X9 provides Gen 5 with 4 lanes (CPU only). Integrated graphics are different: the desktop part uses UHD Graphics 770, the mobile part uses Arc B390. The i9-14900 has a launch MSRP of $549; the Ultra X9 has no recorded launch MSRP. Both have locked multipliers.

FAQ

Q: Which processor is faster in multi-core benchmarks?

A: The Intel Core i9-14900 wins all recorded multi-core tests. It leads by 62.2% in Cinebench R15 multi-core, 21.4% in R20 multi-core, and 64.3% in R23 multi-core. PassMark multi-thread shows a 21.1% lead.

Q: Is the Core Ultra X9 388H competitive in single-core performance?

A: It is very close. The i9-14900 wins PassMark single-thread by 1% (4,323 versus 4,280) and Cinebench R23 single-core by 0.5% (2,212 versus 2,200.5). The Ultra X9 wins Cinebench R15 single-core by a narrow margin of 1.8% in raw score, though the recorded delta shows the i9-14900 as the winner.

Q: Which chip has more cores and threads?

A: The i9-14900 has 24 cores and 32 threads. The Core Ultra X9 388H has 16 cores and 16 threads. The Ultra X9 does not have Hyper-Threading.

Q: What are the process node differences?

A: The i9-14900 uses a 10 nm process node (Raptor Lake architecture). The Core Ultra X9 388H uses a 3 nm process node (Panther Lake architecture). Both are made by Intel.

Q: Which processor supports ECC memory?

A: Only the i9-14900 supports ECC memory. The Core Ultra X9 388H does not.

Q: How do the cache sizes compare?

A: The i9-14900 has 80 KB L1 per core, 2 MB L2 per core, and 36 MB shared L3. The Ultra X9 has 192 KB L1 per core, 3 MB L2 per core, and 18 MB shared L3.

Specification Differences

The two processors differ in nearly every major specification category. The i9-14900 is a desktop part with 24 cores and 32 threads; the Ultra X9 is a mobile part with 16 cores and 16 threads. Base clocks are 2.00 GHz versus 2.10 GHz; boost clocks are 5.80 GHz versus 5.10 GHz. TDP is 65 watts versus 25 watts.

Sockets differ: Intel Socket 1700 versus Intel BGA 2540. Architecture differs: Raptor Lake versus Panther Lake. Process nodes differ: 10 nm versus 3 nm. Die size is recorded only for the i9-14900 at 257 mm²; the Ultra X9 has no recorded die size.

Cache configurations differ per core and in shared L3: 80 KB L1 per core versus 192 KB, 2 MB L2 per core versus 3 MB, and 36 MB shared L3 versus 18 MB. Memory support differs: DDR4 and DDR5 versus LPDDR5X. The Ultra X9 has a recorded memory bandwidth of 153.6 GB/s; the i9-14900 has no recorded bandwidth value. ECC support exists only on the i9-14900.

PCIe lanes differ: 16 Gen 5 lanes (CPU only) versus 4 Gen 5 lanes (CPU only). Integrated graphics differ: UHD Graphics 770 versus Arc B390. The market segment is Desktop versus Mobile. Release dates differ: 2024-01-07 for the i9-14900, 2026-01-04 for the Ultra X9. The i9-14900 has a launch MSRP of $549; the Ultra X9 has none recorded. Part numbers are SRN3V versus SA4QWQ9EK.

The Verdict

The Intel Core i9-14900 is the faster processor in the vast majority of recorded benchmarks. It wins 15 of 17 head-to-head tests, including all Cinebench multi-core runs and most PassMark tests. Its 24-core, 32-thread configuration delivers a 64.3% lead in Cinebench R23 multi-core and a 92.6% lead in integer math. The 36 MB shared L3 cache and 16 PCIe Gen 5 lanes make it suitable for desktop workloads that demand high throughput and expansion capability. It supports ECC memory and dual-channel DDR4 or DDR5. The launch MSRP is $549.

The Core Ultra X9 388H wins only two tests: prime number finding (47.5% ahead) and physics (22.9% ahead). It matches the i9-14900 in single-core performance within 1%, despite a lower boost clock of 5.10 GHz versus 5.80 GHz. Its 3 nm process node and larger per-core caches (192 KB L1, 3 MB L2) contribute to this efficiency. The 25-watt TDP indicates a design focused on mobile power envelopes. It uses LPDDR5X memory and has a recorded bandwidth of 153.6 GB/s. It has no ECC support and only 4 PCIe Gen 5 lanes.

The data indicates the i9-14900 is the choice for desktop users who need maximum multi-threaded performance, large cache, and PCIe expansion. The Ultra X9 is the choice for mobile users who need competitive single-thread speed and specific integer or physics workload advantages, while operating within a much lower power budget. The two parts target different market segments, and their benchmark results align with those roles.