Intel Core Ultra 5 250K Plus vs Intel Processor U300L Comparison

Intel Core Ultra 5 250K Plus vs Intel Processor U300L

The Intel Core Ultra 5 250K Plus and the Intel Processor U300L occupy different segments of the desktop and mobile markets respectively. The Core Ultra 5 250K Plus is an 18-core desktop processor built on a 3 nm process with a 125 W TDP and a boost clock of 5.30 GHz. The Processor U300L is a 5-core mobile chip on a 10 nm process with a 15 W TDP and a boost clock of 4.40 GHz. The database records no direct head-to-head benchmark comparisons between the two, as the U300L has no recorded benchmark scores. The Core Ultra 5 250K Plus, however, carries a comprehensive set of measured results, placing it in the 93rd percentile of all CPUs tested. The U300L lands in the 50th percentile, though with an average benchmark score of zero in the database, reflecting its lack of recorded tests. This analysis relies entirely on the recorded data for the Core Ultra 5 250K Plus and the structural specifications of both processors.

Head-to-Head Benchmarks

Because the Intel Processor U300L has no benchmark entries in the database, a direct numerical comparison of measured performance is impossible. The recorded data instead shows a complete profile for the Core Ultra 5 250K Plus across multiple test suites, including Cinebench and PassMark. The Core Ultra 5 250K Plus scores 4640 points in Cinebench R15 multi-core and 328 points in single-core. In Cinebench R20, it records 18442 multi-core and 2603 single-core. The R23 results show 30867 multi-core and 2261 single-core. These figures indicate a strong multi-threaded capability, with the multi-core scores far exceeding their single-core counterparts in each Cinebench version.

PassMark results for the Core Ultra 5 250K Plus further detail its performance. The multi-thread test records 51596 points, while single-thread scores 4757 points. Integer math reaches 125091, floating point math reaches 162692, and extended instructions score 44565. Data compression scores 568721, data encryption scores 42144, and random string sorting scores 69090. Physics simulation records 3494 points, and finding prime numbers scores 486. These results show consistent strength in computational workloads, with floating point math and data compression being particularly high relative to other measured categories.

The average benchmark score for the Core Ultra 5 250K Plus is 66855. Its nearest rivals in the database are the AMD EPYC 4465P with an average score of 66925 and a delta of -0.1%, the Intel Xeon 6515P with 67006 and a delta of -0.2%, the Intel Core Ultra 9 275HX with 67469 and a delta of -0.9%, and the Intel Core Ultra 5 250KF Plus with 66159 and a delta of 1.1%. The Core Ultra 5 250K Plus trails the AMD EPYC 4465P by 0.1%, the Intel Xeon 6515P by 0.2%, and the Intel Core Ultra 9 275HX by 0.9%. It leads the Core Ultra 5 250KF Plus by 1.1%. These deltas are small, indicating that the Core Ultra 5 250K Plus sits in a tightly clustered performance band among these processors. The 93rd percentile ranking places it above the majority of all CPUs in the database.

The absence of any recorded scores for the U300L means its performance cannot be quantified from the data. Its 50th percentile ranking, derived from structural characteristics rather than measured results, suggests a mid-range position, but no benchmark evidence supports a numerical comparison. The head-to-head section, therefore, is defined by the Core Ultra 5 250K Plus's recorded performance and the U300L's lack thereof.

Where Each One Wins

The Core Ultra 5 250K Plus wins in every measurable category, given that it is the only processor with recorded benchmark data. Its multi-core performance is especially pronounced. The Cinebench R23 multi-core score of 30867, compared to its single-core score of 2261, shows a ratio of roughly 13.6 to 1, indicating that the 18 cores and 18 threads are fully utilized in heavily parallel workloads. The PassMark multi-thread score of 51596 versus the single-thread score of 4757 similarly reflects a strong scaling advantage. For tasks like rendering, data compression, and floating point math, the Core Ultra 5 250K Plus delivers results that place it in the top 7% of all CPUs, per its 93rd percentile ranking.

The U300L, with 5 cores and 6 threads, is a low-power mobile processor. Its 15 W TDP and 1.20 GHz base clock suggest a design focused on energy efficiency rather than raw throughput. The database records no wins for it, and its lack of benchmark scores means no workload can be identified where it outperforms the Core Ultra 5 250K Plus based on measured data. Structurally, the U300L supports both DDR4 and DDR5 memory, while the Core Ultra 5 250K Plus supports only DDR5. This memory flexibility is a specification advantage for the U300L in systems where DDR4 is preferred, but it is not a performance win in the recorded data.

The Core Ultra 5 250K Plus also supports ECC memory, which is absent on the U300L. For error-sensitive computing environments, this is a functional advantage. The Core Ultra 5 250K Plus offers PCIe Gen 5 with 20 lanes, while the U300L offers PCIe Gen 4 with 8 lanes, giving the desktop part a clear bandwidth advantage for expansion cards and storage. The integrated graphics differ as well: the Core Ultra 5 250K Plus uses Arc Xe-LPG Graphics with 64 execution units, while the U300L uses UHD Graphics with 48 execution units. The higher execution unit count on the Core Ultra 5 250K Plus suggests greater iGPU capability, though no benchmark scores confirm this.

Architecture Differences

The two processors come from different architectural lineages and process nodes. The Core Ultra 5 250K Plus is part of the Core Ultra Series 2, based on the Arrow Lake Refresh codename and built on a 3 nm process by TSMC. The U300L belongs to the Raptor Lake family, specifically the Raptor Lake-PS codename, on a 10 nm process from Intel. The Core Ultra 5 250K Plus uses 17,800 million transistors on a die size of 243 mm², while the U300L has no recorded transistor count or die size in the database. This process difference has direct implications for power efficiency and transistor density, with the 3 nm node enabling a much larger core count within the desktop part's power envelope.

Core counts differ substantially. The Core Ultra 5 250K Plus has 18 cores and 18 threads, all of which appear to be performance-oriented given the 1:1 core-to-thread ratio. The U300L has 5 cores and 6 threads, a configuration that includes a mix of performance and efficiency cores typical of Raptor Lake designs, though the database does not specify the breakdown. The cache hierarchy also diverges. The Core Ultra 5 250K Plus features 192 KB of L1 cache per core, 3 MB of L2 cache per core, and 30 MB of shared L3 cache. The U300L has 80 KB of L1 per core, 1.25 MB of L2 per core, and 8 MB of shared L3 cache. The Core Ultra 5 250K Plus therefore has far more cache at every level, which supports its higher bandwidth and multi-threaded performance.

Clock speeds reflect the performance and efficiency targets of each part. The Core Ultra 5 250K Plus has a base clock of 4.20 GHz and a boost clock of 5.30 GHz. The U300L has a base clock of 1.20 GHz and a boost clock of 4.40 GHz. The desktop processor runs at a significantly higher base frequency, and its boost frequency is also higher. The TDP difference is large: 125 W for the Core Ultra 5 250K Plus versus 15 W for the U300L. This 110 W gap underscores the desktop part's focus on sustained performance under load, while the mobile part prioritizes low power consumption. The Core Ultra 5 250K Plus has an unlocked multiplier, allowing overclocking, while the U300L is locked.

Memory support differs in scope. The Core Ultra 5 250K Plus supports DDR5 only, with a dual-channel memory bus and a memory bandwidth of 115.2 GB/s. The U300L supports both DDR4 and DDR5, also on a dual-channel bus, but its memory bandwidth is not recorded in the database. ECC memory is supported on the Core Ultra 5 250K Plus but not on the U300L. The PCIe interface also differs: the Core Ultra 5 250K Plus provides Gen 5 with 20 lanes from the CPU, while the U300L provides Gen 4 with 8 lanes. The sockets are incompatible, with the Core Ultra 5 250K Plus using Intel Socket 1851 and the U300L using Intel Socket 1700.

The integrated graphics represent another architectural split. The Core Ultra 5 250K Plus uses Arc Xe-LPG Graphics with 64 execution units, a newer GPU architecture. The U300L uses UHD Graphics with 48 execution units, an older design. The Core Ultra 5 250K Plus was released on March 10, 2026, while the U300L was released on April 7, 2024. The U300L is classified as a mobile processor, while the Core Ultra 5 250K Plus is a desktop part. Both are listed as active in production. The launch MSRP for the Core Ultra 5 250K Plus is $199, and for the U300L it is $107.

The Verdict

The recorded data supports a clear distinction between these two processors. The Intel Core Ultra 5 250K Plus is a high-performance desktop CPU with measured results across multiple suites, a 93rd percentile ranking, and an average benchmark score of 66855. Its 18 cores, 5.30 GHz boost clock, and 30 MB of L3 cache position it for demanding multi-threaded workloads. The Intel Processor U300L, by contrast, has no recorded benchmark scores, a 50th percentile ranking, and an average score of zero. It is a low-power mobile chip with 5 cores, a 4.40 GHz boost clock, and 8 MB of L3 cache, designed for efficiency rather than peak performance.

For users selecting a desktop processor for compute-heavy tasks, the data points to the Core Ultra 5 250K Plus. Its benchmark results show strong multi-core scaling and high single-thread performance. The U300L, with its 15 W TDP and mobile classification, suits low-power systems where energy consumption is the priority. The database does not provide any measured evidence of the U300L outperforming the Core Ultra 5 250K Plus in any workload. The Verdict, based strictly on the recorded data, is that the Core Ultra 5 250K Plus is the superior performer, while the U300L offers a power-efficient alternative with broader memory compatibility, including DDR4 and DDR5 support.

The small delta percentages against the Core Ultra 5 250K Plus's nearest rivals show that it competes closely with server-class and high-end mobile parts. It trails the AMD EPYC 4465P by only 0.1%, the Intel Xeon 6515P by 0.2%, and the Intel Core Ultra 9 275HX by 0.9%, while leading the Core Ultra 5 250KF Plus by 1.1%. These margins indicate a processor that is well-positioned within its performance class, though not at the top of it.

FAQ

Q: What is the core count difference between the Intel Core Ultra 5 250K Plus and the Intel Processor U300L?

A: The Intel Core Ultra 5 250K Plus has 18 cores and 18 threads, while the Intel Processor U300L has 5 cores and 6 threads.

Q: Which processor has a higher boost clock?

A: The Intel Core Ultra 5 250K Plus has a boost clock of 5.30 GHz, compared to the Intel Processor U300L's boost clock of 4.40 GHz.

Q: Does the Intel Processor U300L support ECC memory?

A: No, the Intel Processor U300L does not support ECC memory. The Intel Core Ultra 5 250K Plus does support ECC memory.

Q: What is the average benchmark score for each processor?

A: The Intel Core Ultra 5 250K Plus has an average benchmark score of 66855. The Intel Processor U300L has an average benchmark score of 0, as no benchmarks are recorded for it.

Q: Which processor has a larger L3 cache?

A: The Intel Core Ultra 5 250K Plus has 30 MB of shared L3 cache, while the Intel Processor U300L has 8 MB of shared L3 cache.

Q: What memory types does each processor support?

A: The Intel Core Ultra 5 250K Plus supports DDR5 memory only. The Intel Processor U300L supports both DDR4 and DDR5 memory.