Intel Core Ultra X9 378H vs Intel Processor U303L Comparison

Head-to-Head Benchmarks

The Intel Core Ultra X9 378H and the Intel Processor U303L occupy very different positions in the database. The X9 378H has a full suite of benchmark results, while the U303L has no recorded benchmark scores at all. This makes direct comparison one-sided, but the available data for the X9 378H can be anchored against its nearest rivals to show what the absence of data for the U303L likely means.

The X9 378H delivers a Cinebench R23 multi-core score of 32553 and a single-core score of 4595. In Cinebench R20, it records 13672 multi-core and 1929 single-core, while in Cinebench R15 it posts 3281 multi-core and 462 single-core. These scores place the chip in the 89th percentile among all CPUs in the database. Its average benchmark score is 47468, which sits almost exactly level with the AMD Ryzen 9 PRO 5945 at 47527, a difference of -0.1%. The Intel Core i7-13700KF scores 47330, putting the X9 378H ahead by 0.3%. The Intel Core Ultra 7 265T scores 47697, meaning the X9 378H trails it by 0.5%. Against the Intel Core i9-12900F at 47176, the X9 378H leads by 0.6%.

The PassMark suite reinforces the picture. The X9 378H scores 386591 in data compression, 29840 in data encryption, 31315 in extended instructions, and 357 in find prime numbers. Floating point math comes in at 114500, integer math at 92603, and multithread at 38298. Physics scores 3404, random string sorting scores 44648, and single-thread performance is 4453. These results show a processor that is strong in both threaded and single-threaded work, with the multithread score of 38298 and the single-thread score of 4453 both well above typical mobile parts in the database.

The U303L, by contrast, has an empty benchmark array. No Cinebench scores, no PassMark scores, and no average benchmark value are recorded. Its percentile ranking sits at 50, which is the midpoint of the database distribution, but this appears to be a placeholder rather than a measured result. Without recorded scores, the database provides no direct evidence of how the U303L performs in any workload.

The Verdict

The data supports a clear split. The X9 378H is a measured, high-performing mobile processor with a full set of benchmark results and a 89th percentile ranking. Its average score of 47468 places it in the same tier as desktop-class parts like the Intel Core i7-13700KF and the AMD Ryzen 9 PRO 5945, with deltas of 0.3% and -0.1% respectively. Any workload that benefits from multi-core throughput, such as rendering, compilation, or data processing, would be served by this chip according to the recorded numbers.

The U303L has no benchmark data in the database. It cannot be compared on measured performance, and any selection between the two would have to rely on the recorded specification differences rather than scores. The X9 378H is the only one of the two with evidence of performance in the database. Users who require validated benchmark results should choose the X9 378H. Users who need a low-power part with a different socket and memory type may consider the U303L on the strength of its specifications, but the database offers no performance confirmation for it.

FAQ

Q: Does the Intel Processor U303L have any benchmark scores in the database?

A: No. The benchmark array for the U303L is empty, its average benchmark score is 0, and it has no nearest rivals listed. The X9 378H, by contrast, has 17 recorded benchmark scores across Cinebench and PassMark tests.

Q: How does the X9 378H compare to its nearest rival, the AMD Ryzen 9 PRO 5945?

A: The X9 378H has an average benchmark score of 47468, which is 0.1% lower than the Ryzen 9 PRO 5945 at 47527. The difference is effectively negligible in the database.

Q: What is the X9 378H's percentile ranking?

A: The X9 378H sits in the 89th percentile among all CPUs in the database, meaning it outperforms the majority of recorded processors.

Q: Which processor has a higher boost clock?

A: The X9 378H has a boost clock of 5.00 GHz, while the U303L has a boost clock of 2.60 GHz. The X9 378H also has a higher base clock at 2.00 GHz versus 1.20 GHz.

Q: What is the launch MSRP of the Intel Processor U303L?

A: The launch MSRP for the U303L is $285. The X9 378H does not have a launch MSRP recorded in the database.

Q: Are there any head-to-head benchmark results between these two processors?

A: No. The head-to-head benchmark array is empty, and the wins count for each processor is 0. The database does not contain any direct comparison tests between the X9 378H and the U303L.

Specification Differences

The two processors differ across nearly every major specification field. The X9 378H has 16 cores and 16 threads, while the U303L has 5 cores and 6 threads. Base clocks are 2.00 GHz for the X9 378H and 1.20 GHz for the U303L. Boost clocks are 5.00 GHz and 2.60 GHz respectively. Thermal design power is 25 watts for the X9 378H and 15 watts for the U303L.

The sockets are different: the X9 378H uses Intel BGA 2540, while the U303L uses Intel Socket 1700. The X9 378H supports LPDDR5X memory, while the U303L supports DDR4 and DDR5. Memory bandwidth is recorded at 153.6 GB/s for the X9 378H, while the U303L has no memory bandwidth figure. PCIe support differs as well: the X9 378H uses Gen 5 with 4 lanes (CPU only), and the U303L uses Gen 4 with 8 lanes (CPU only).

The integrated graphics differ: the X9 378H has Arc B390, while the U303L has UHD Graphics 96EU. Neither processor supports ECC memory, and neither has an unlocked multiplier. The U303L has a recorded part number of SRPKEQ5CV, while the X9 378H has an unknown part number. The release dates also differ, with the U303L released earlier than the X9 378H.

Architecture Differences

The X9 378H belongs to the Core Ultra Series 3 and uses the Panther Lake codename, with its generation listed as Ultra X9 (Panther Lake-H). It is built on a 3 nm process node at Intel. The U303L is based on Raptor Lake architecture with the Raptor Lake-PS codename, and it is built on a 10 nm process node at Intel. Both are manufactured by Intel, and both target the mobile market segment.

Cache configurations differ substantially. The 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 U303L has 80 KB of L1 cache per core, 1.25 MB of L2 cache per core, and 12 MB of shared L3 cache. These differences align with the core count disparity: the X9 378H has more than three times the cores and more than twice the threads of the U303L.

The X9 378H is listed as part of the Core Ultra Series 3, while the U303L does not have a series designation. The X9 378H generation is explicitly recorded, while the U303L generation is listed as Intel Processor (Raptor Lake). Both chips are marked as Active in production status.

Where Each One Wins

The X9 378H wins on every measurable performance axis in the database. Its 16 cores and 16 threads, combined with a 5.00 GHz boost clock and 18 MB of L3 cache, drive Cinebench R23 multi-core to 32553 and PassMark multithread to 38298. Single-thread performance is also strong at 4453 in PassMark and 4595 in Cinebench R23. The 89th percentile ranking confirms that this processor sits near the top of the database distribution, with average scores comparable to desktop-class rivals like the Intel Core i7-13700KF and the AMD Ryzen 9 PRO 5945.

The U303L has no recorded benchmark wins because it has no recorded benchmark scores. Its advantages in the database are purely specification-based. It has a lower thermal design power of 15 watts, which suggests lower power consumption than the X9 378H's 25 watts, though the database does not provide measured power data. It supports DDR4 and DDR5 memory, offering memory type flexibility that the X9 378H does not have with its LPDDR5X-only support. It also has 8 PCIe Gen 4 lanes compared to the X9 378H's 4 PCIe Gen 5 lanes, which may allow for more expansion devices, though the database does not record any performance impact from this difference.

For workloads that rely on multi-core throughput, the X9 378H is the only option with evidence in the database. For workloads that require low power and memory flexibility, the U303L has specification-level advantages, but no benchmark data supports a performance claim. The database records the X9 378H as a top-tier mobile processor and the U303L as a mid-tier part without measured results.