Intel Core 3 100UL vs Intel Core Ultra X9 378H Comparison

The Verdict

The Intel Core Ultra X9 378H is the clear performance leader in this comparison, based on the recorded benchmark data. The Core Ultra X9 378H holds an 89th percentile ranking among all CPUs in the database, while the Intel Core 3 100UL sits at the 50th percentile. The Core Ultra X9 378H delivers a multi-threaded score of 32,553 in Cinebench R23, a figure that places it within 0.3% of the Intel Core i7-13700KF and 0.6% above the Intel Core i9-12900F in average benchmark scores. The Core 3 100UL has no recorded benchmark scores in the database, meaning the comparison relies entirely on the specifications and the recorded performance data of the Core Ultra X9 378H.

The Intel Core 3 100UL targets a different segment entirely. It is a desktop processor with a 15 W TDP, built on the older Raptor Lake architecture and a 10 nm process node. It uses the Intel Socket 1700 platform and supports DDR4 and DDR5 memory. The Core Ultra X9 378H is a mobile processor with a 25 W TDP, built on the newer Panther Lake architecture and a 3 nm process node. It uses the Intel BGA 2540 socket and supports only LPDDR5X memory. The data indicates these are not direct competitors; they serve different platforms and use cases.

For users building a desktop system with an existing LGA 1700 motherboard, the Core 3 100UL offers a low-power option with six cores and eight threads, boosting to 4.50 GHz. For users seeking maximum performance in a mobile form factor, the Core Ultra X9 378H provides 16 cores, 16 threads, a 5.00 GHz boost clock, and a measured memory bandwidth of 153.6 GB/s. The benchmark results show the Core Ultra X9 378H is the only one of the two with recorded performance data, and that data is strong across both single-threaded and multi-threaded workloads. The verdict is straightforward: the Core Ultra X9 378H is the performance choice, while the Core 3 100UL is the desktop platform option with a lower power envelope.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra X9 378H has 16 cores and 16 threads. The Intel Core 3 100UL has 6 cores and 8 threads.

Q: What is the difference in boost clock speeds?

A: The Intel Core Ultra X9 378H boosts to 5.00 GHz, while the Intel Core 3 100UL boosts to 4.50 GHz.

Q: Which processor uses a newer manufacturing process?

A: The Intel Core Ultra X9 378H uses a 3 nm process node, while the Intel Core 3 100UL uses a 10 nm process node.

Q: What memory types does each processor support?

A: The Intel Core 3 100UL supports DDR4 and DDR5 memory. The Intel Core Ultra X9 378H supports LPDDR5X memory only.

Q: Which processor has a higher benchmark percentile ranking?

A: The Intel Core Ultra X9 378H ranks in the 89th percentile among all CPUs in the database. The Intel Core 3 100UL ranks in the 50th percentile.

Q: What is the TDP of each processor?

A: The Intel Core 3 100UL has a TDP of 15 W. The Intel Core Ultra X9 378H has a TDP of 25 W.

Architecture Differences

The two processors come from different architectural generations and target different market segments. The Intel Core 3 100UL uses the Raptor Lake architecture, specifically the Raptor Lake-PS variant, and is classified as a desktop processor. The Intel Core Ultra X9 378H uses the Panther Lake architecture, specifically the Panther Lake-H variant, and is classified as a mobile processor. The Core Ultra X9 378H belongs to the Core Ultra Series 3 product family, while the Core 3 100UL has no series designation in the database.

The manufacturing process differs substantially. The Core 3 100UL is built on a 10 nm node, while the Core Ultra X9 378H is built on a 3 nm node. Both are fabricated by Intel. The newer 3 nm process gives the Core Ultra X9 378H a denser and more power-efficient transistor layout, which aligns with its higher core count and higher TDP of 25 W compared to 15 W for the Core 3 100UL.

Cache hierarchies also differ. The Core 3 100UL has 80 KB of L1 cache per core, 1.25 MB of L2 cache per core, and 10 MB of shared L3 cache. The Core Ultra X9 378H has 192 KB of L1 cache per core, 2.5 MB of L2 cache per core, and 18 MB of shared L3 cache. The larger per-core caches and the larger L3 pool give the Core Ultra X9 378H a structural advantage in workloads that benefit from data reuse and high memory locality.

The integrated graphics differ as well. The Core 3 100UL uses UHD Graphics with 64 execution units. The Core Ultra X9 378H uses Arc B390 graphics. The Arc B390 is a more capable integrated GPU, though the database does not include graphics benchmarks for either processor to quantify the difference.

PCIe support differs by generation and lane count. The Core 3 100UL provides PCIe Gen 4 with 8 lanes (CPU only). The Core Ultra X9 378H provides PCIe Gen 5 with 4 lanes (CPU only). The newer PCIe Gen 5 standard doubles the per-lane bandwidth compared to Gen 4, though the Core Ultra X9 378H has fewer available CPU lanes.

Memory support is another architectural differentiator. The Core 3 100UL supports both DDR4 and DDR5 in a dual-channel configuration. The Core Ultra X9 378H supports only LPDDR5X in a dual-channel configuration, but the database records a memory bandwidth of 153.6 GB/s for this processor. The Core 3 100UL has no recorded memory bandwidth figure.

The release dates show a generational gap. The Core 3 100UL was released on April 7, 2024. The Core Ultra X9 378H was released on April 3, 2026. Both processors are currently marked as "Active" in production status, and neither has an unlocked multiplier.

Specification Differences

The two processors differ across nearly every specification field in the database. The socket is a primary differentiator: the Core 3 100UL uses Intel Socket 1700, while the Core Ultra X9 378H uses Intel BGA 2540. The Core 3 100UL is a desktop part with a socketed package, while the Core Ultra X9 378H is a mobile part with a ball-grid array package soldered to the board.

Core and thread counts differ significantly. The Core 3 100UL offers 6 cores and 8 threads. The Core Ultra X9 378H offers 16 cores and 16 threads. The Core Ultra X9 378H thus has more than double the core count and exactly double the thread count.

Clock speeds differ in both base and boost. The Core 3 100UL has a base clock of 1.20 GHz and a boost clock of 4.50 GHz. The Core Ultra X9 378H has a base clock of 2.00 GHz and a boost clock of 5.00 GHz. The Core Ultra X9 378H starts at a higher base frequency and also reaches a higher peak frequency.

Thermal design power differs by 10 W. The Core 3 100UL is rated at 15 W TDP, while the Core Ultra X9 378H is rated at 25 W TDP. The Core Ultra X9 378H consumes more power but delivers substantially more compute capability, as the benchmark data confirms.

Cache specifications differ at every level. The Core 3 100UL has 80 KB L1 per core, 1.25 MB L2 per core, and 10 MB L3 shared. The Core Ultra X9 378H has 192 KB L1 per core, 2.5 MB L2 per core, and 18 MB L3 shared. The total L3 cache for the Core Ultra X9 378H is 80% larger than that of the Core 3 100UL.

Memory support differs in type and bandwidth. The Core 3 100UL supports DDR4 and DDR5. The Core Ultra X9 378H supports LPDDR5X and has a recorded memory bandwidth of 153.6 GB/s. The Core 3 100UL has no recorded memory bandwidth figure.

PCIe support differs in generation and lane count. The Core 3 100UL uses PCIe Gen 4 with 8 lanes (CPU only). The Core Ultra X9 378H uses PCIe Gen 5 with 4 lanes (CPU only).

Integrated graphics differ. The Core 3 100UL uses UHD Graphics 64EU. The Core Ultra X9 378H uses Arc B390.

Market segment differs. The Core 3 100UL is listed as a Desktop processor. The Core Ultra X9 378H is listed as a Mobile processor.

Neither processor has a recorded launch MSRP in the database, neither supports ECC memory, and neither has an unlocked multiplier.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between the Intel Core 3 100UL and the Intel Core Ultra X9 378H. The Core 3 100UL has no benchmark scores recorded at all. The Core Ultra X9 378H has a full suite of 17 recorded benchmark scores across Cinebench and PassMark tests.

The Core Ultra X9 378H delivers strong multi-threaded performance. In Cinebench R23 multi-core, it scores 32,553. In Cinebench R20 multi-core, it scores 13,672. In Cinebench R15 multi-core, it scores 3,281. These results place the processor at the 89th percentile among all CPUs in the database, with an average benchmark score of 47,468.

Single-threaded performance is also solid. The Core Ultra X9 378H scores 4,595 in Cinebench R23 single-core, 1,929 in Cinebench R20 single-core, and 462 in Cinebench R15 single-core. In PassMark single-thread testing, it scores 4,453.

The Core Ultra X9 378H shows particular strength in integer and floating-point math workloads. It scores 92,603 in PassMark integer math and 114,500 in PassMark floating-point math. Data compression scores 386,591 in PassMark, while data encryption scores 29,840. Extended instructions score 31,315, and random string sorting scores 44,648.

The nearest rivals in the database provide context for the Core Ultra X9 378H's standing. The AMD Ryzen 9 PRO 5945 has an average score of 47,527, which is 0.1% higher than the Core Ultra X9 378H's average of 47,468. The Intel Core i7-13700KF scores 47,330, which is 0.3% lower. The Intel Core Ultra 7 265T scores 47,697, which is 0.5% higher. The Intel Core i9-12900F scores 47,176, which is 0.6% lower. These deltas are all within 1%, indicating the Core Ultra X9 378H performs in the same tier as these established desktop and mobile processors.

The Core 3 100UL has no recorded scores, so the head-to-head comparison is one-sided. The data shows the Core Ultra X9 378H is the only processor in this pairing with measurable performance, and its measured performance is strong in both single-threaded and multi-threaded tests.

Where Each One Wins

The Intel Core Ultra X9 378H wins in every measurable performance category in this comparison, simply because it is the only one of the two with recorded benchmark data. Its 89th percentile ranking reflects strong standing across the entire CPU database. The processor wins in multi-threaded workloads, as shown by the Cinebench R23 multi-core score of 32,553 and the PassMark multithread score of 38,298. It wins in single-threaded workloads, with a PassMark single-thread score of 4,453 and a Cinebench R23 single-core score of 4,595. It wins in specialized workloads such as data compression, data encryption, and extended instructions, with scores of 386,591, 29,840, and 31,315 respectively.

The Intel Core 3 100UL wins on platform compatibility for desktop systems. It uses the Intel Socket 1700, which is a desktop socket, and it supports both DDR4 and DDR5 memory. This makes it a drop-in option for existing LGA 1700 motherboards. Its 15 W TDP is lower than the 25 W TDP of the Core Ultra X9 378H, which may suit systems with modest cooling or power budgets. It also uses PCIe Gen 4 with 8 CPU lanes, which provides more CPU-attached lanes than the 4 lanes of the Core Ultra X9 378H, albeit at the older standard.

The Core Ultra X9 378H wins on architectural modernity. It uses a 3 nm process node versus the 10 nm node of the Core 3 100UL. It has a larger cache hierarchy at every level, with 192 KB L1 per core, 2.5 MB L2 per core, and 18 MB L3 shared. It has a higher boost clock of 5.00 GHz versus 4.50 GHz. It has a higher base clock of 2.00 GHz versus 1.20 GHz. It has a recorded memory bandwidth of 153.6 GB/s, a figure not available for the Core 3 100UL. It uses PCIe Gen 5, the newer standard.

For mobile use cases, the Core Ultra X9 378H is the clear choice. It is a mobile processor with a BGA 2540 package, and its 16 cores and 16 threads provide high compute throughput in a laptop form factor. The Arc B390 integrated graphics offer a more capable GPU solution than the UHD Graphics 64EU in the Core 3 100UL.

For desktop use cases with an existing LGA 1700 platform, the Core 3 100UL is the compatible option. It is a desktop processor with a socketed package, and its support for DDR4 and DDR5 gives builders memory flexibility. Its lower TDP of 15 W may suit compact desktop builds. However, the lack of recorded benchmarks means its actual performance level is not quantified in the database, while the Core Ultra X9 378H's performance is extensively documented.