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

Intel Core Ultra 5 250KF Plus and Intel Processor U300L occupy opposite ends of Intel’s desktop and mobile lineup. The Ultra 5 250KF Plus is a 18-thread desktop part built for heavy workloads, while the U300L is a 6-thread mobile processor aimed at efficiency. The recorded data shows a clear performance hierarchy, but each chip has a distinct role based on power envelope, platform support, and integrated graphics.

Where Each One Wins

The Intel Core Ultra 5 250KF Plus wins in every measurable compute benchmark. It delivers 18 cores and 18 threads, a 5.30 GHz boost clock, and a 93rd percentile ranking against all CPUs in the database. Its average benchmark score of 66159 places it alongside high-end desktop parts. The nearest rivals include the AMD Ryzen 9 7950X3D at 65914 (0.4% behind) and the Intel Core 9 273PQE at 66099 (0.1% behind), confirming the Ultra 5 sits in flagship-adjacent territory.

The Intel Processor U300L wins in platform efficiency and integration. It has a 15 W TDP, a 10 nm Intel process, and includes UHD Graphics 48EU, so it does not require a discrete GPU for basic display output. The Ultra 5 250KF Plus has no integrated graphics, meaning a separate video card is mandatory. The U300L also supports DDR4 and DDR5 memory, while the Ultra 5 supports only DDR5.

The use-case split is straightforward. The Ultra 5 250KF Plus targets multi-threaded desktop workloads such as rendering, compilation, and data processing. The U300L targets low-power mobile systems where battery life and modest thermal output matter more than raw throughput. The U300L’s 50th percentile ranking reflects a mid-pack position, adequate for everyday tasks but far behind the Ultra 5’s 93rd percentile.

Architecture Differences

The two processors come from different Intel generations and foundries. The Ultra 5 250KF Plus uses the Arrow Lake Refresh design on a 3 nm TSMC process, with 17,800 million transistors on a 243 mm² die. The U300L uses Raptor Lake architecture on Intel’s 10 nm process, with no transistor or die size data recorded. This process gap explains the large difference in power efficiency and transistor density.

Core configurations diverge sharply. The Ultra 5 has 18 cores and 18 threads, indicating no hyper-threading on its performance cores. The U300L has 5 cores and 6 threads, a hybrid arrangement typical of Raptor Lake mobile parts. The Ultra 5’s cache hierarchy is much larger: 192 KB L1 per core, 3 MB L2 per core, and 30 MB shared L3. The U300L has 80 KB L1 per core, 1.25 MB L2 per core, and 8 MB shared L3.

Memory and PCIe support also separate the two. The Ultra 5 uses DDR5 dual-channel memory with 115.2 GB/s bandwidth and supports ECC. The U300L supports DDR4 and DDR5 dual-channel but has no recorded memory bandwidth and no ECC support. The Ultra 5 provides PCIe Gen 5 with 20 CPU lanes; the U300L provides PCIe Gen 4 with 8 CPU lanes. The Ultra 5 uses Intel Socket 1851, while the U300L uses Intel Socket 1700, so they are not platform-compatible.

The Ultra 5 has an unlocked multiplier, making it suitable for overclocking. The U300L is locked. The U300L includes integrated UHD Graphics 48EU; the Ultra 5 has no integrated graphics at all. These architectural differences confirm the Ultra 5 is a high-throughput desktop engine, while the U300L is a compact mobile processor with display output built in.

Head-to-Head Benchmarks

The head-to-head benchmark list is empty, and the U300L has no recorded benchmark scores. However, the Ultra 5’s individual benchmark results provide a full picture of its capability. In Cinebench R23, the Ultra 5 scores 42718 multi-core and 6030 single-core. In Cinebench R20, it scores 17941 multi-core and 2532 single-core. In Cinebench R15, it scores 4305 multi-core and 607 single-core.

PassMark results reinforce the multi-threaded strength. The Ultra 5 scores 50146 in multithread, 553155 in data compression, 41292 in data encryption, and 42880 in extended instructions. Integer math scores 123030, floating point math scores 159824, and find prime numbers scores 452. Random string sorting reaches 67209, physics reaches 3183, and single-thread reaches 4698.

The U300L’s lack of recorded scores means no direct comparison is possible from the database. The Ultra 5’s 93rd percentile and 66159 average score stand against the U300L’s 50th percentile and average score of 0. The delta between these two parts is effectively the difference between a desktop workstation-class chip and a low-power mobile chip. For users relying on the database for purchasing decisions, the Ultra 5 is the only one of the two with measurable performance data.

Specification Differences

The following fields differ between the two processors:

• Cores: 18 (Ultra 5) vs 5 (U300L)
• Threads: 18 vs 6
• Base clock: 4.20 GHz vs 1.20 GHz
• Boost clock: 5.30 GHz vs 4.40 GHz
• TDP: 125 W vs 15 W
• Socket: Intel Socket 1851 vs Intel Socket 1700
• Codename: Arrow Lake Refresh vs Raptor Lake-PS
• Process node: 3 nm (TSMC) vs 10 nm (Intel)
• Foundry: TSMC vs Intel
• Transistors: 17,800 million vs not recorded
• Die size: 243 mm² vs not recorded
• L1 cache: 192 KB per core vs 80 KB per core
• L2 cache: 3 MB per core vs 1.25 MB per core
• L3 cache: 30 MB shared vs 8 MB shared
• Memory support: DDR5 only vs DDR4 and DDR5
• Memory bandwidth: 115.2 GB/s vs not recorded
• ECC memory: supported vs not supported
• PCIe: Gen 5, 20 lanes vs Gen 4, 8 lanes
• Integrated graphics: N/A vs UHD Graphics 48EU
• Market segment: Desktop vs Mobile
• Release date: 2026-03-10 vs 2024-04-07
• Launch MSRP: $184 vs $107
• Unlocked multiplier: yes vs no

The Ultra 5 has a 125 W TDP, more than eight times the U300L’s 15 W. The boost clock advantage is nearly 1 GHz. The cache difference is substantial, with the Ultra 5’s 30 MB L3 dwarfing the U300L’s 8 MB. The platform mismatch means a system built around one cannot use the other.

FAQ

Q: Which processor has more cores?

A: The Intel Core Ultra 5 250KF Plus has 18 cores and 18 threads. The Intel Processor U300L has 5 cores and 6 threads.

Q: Does the Ultra 5 250KF Plus have integrated graphics?

A: No. The Ultra 5 250KF Plus has no integrated graphics. The U300L includes UHD Graphics 48EU.

Q: What memory types does each processor support?

A: The Ultra 5 250KF Plus supports DDR5 only with dual-channel memory. The U300L supports both DDR4 and DDR5 with dual-channel memory.

Q: Which processor has a higher boost clock?

A: The Ultra 5 250KF Plus boosts to 5.30 GHz. The U300L boosts to 4.40 GHz.

Q: Are the two processors socket-compatible?

A: No. The Ultra 5 250KF Plus uses Intel Socket 1851. The U300L uses Intel Socket 1700.

Q: Does the U300L support ECC memory?

A: No. The U300L does not support ECC memory. The Ultra 5 250KF Plus does support ECC.

The Verdict

The data supports a clear choice based on workload. The Intel Core Ultra 5 250KF Plus is the superior processor for any compute-intensive task. Its 18 cores, 5.30 GHz boost, 30 MB L3 cache, and 93rd percentile ranking place it among the fastest CPUs in the database. The nearest rivals are all within 1.1% in average score, meaning the Ultra 5 competes at the top of the desktop stack. The lack of integrated graphics is the only notable omission, requiring a discrete GPU.

The Intel Processor U300L is the appropriate choice for a low-power mobile system. Its 15 W TDP, integrated UHD Graphics 48EU, and dual DDR4/DDR5 support make it a flexible and power-conscious option. The 50th percentile ranking shows it sits in the middle of the database’s CPU distribution, adequate for general use but not for heavy parallel workloads.

The platform decision is binary. A desktop builder with a Socket 1851 motherboard and a discrete GPU should pick the Ultra 5 250KF Plus. A mobile system builder needing integrated graphics, lower power draw, and older memory compatibility should pick the U300L. There is no overlap in socket, power class, or graphics capability, so the correct choice is determined entirely by the target system.