Intel Core Ultra 5 250KF Plus vs Intel Core Ultra 9 285H Comparison

The Verdict

The benchmark database presents a decisive comparison between the Intel Core Ultra 5 250KF Plus and the Intel Core Ultra 9 285H. Across the 17 recorded head-to-head benchmarks, the Core Ultra 5 250KF Plus wins every single one. The data does not show a single test where the Core Ultra 9 285H takes the lead. The average benchmark score for the desktop part is 66159, placing it in the 93rd percentile of all CPUs, while the mobile part averages 38312, landing in the 86th percentile.

The Core Ultra 5 250KF Plus is the clear choice for anyone assembling a desktop system where maximum compute throughput is the priority. The desktop processor delivers massive multicore advantages, ranging from 35.5% to 105.6% depending on the workload. Its nearest rival in the database is the Intel Core 9 273PQE with an average score of 66099, a negligible 0.1% difference, and the AMD Ryzen 9 7950X3D at 65914, a 0.4% difference. This places the 250KF Plus in the same performance class as those high-end parts.

The Core Ultra 9 285H serves a different purpose entirely. As a mobile processor with a 45 W TDP, it is designed for laptops and compact systems. Its average score of 38312 puts it directly against mobile parts like the Intel Core 9 270H at 38335, a 0.1% deficit, and the Intel Core i5-13600HX at 38261, a 0.1% advantage. For mobile workloads, the 285H is competitive within its segment, but it cannot match the raw output of the desktop chip. Anyone needing a processor for a laptop should consider the 285H, while anyone building a desktop should select the 250KF Plus.

Architecture Differences

The two processors share the same foundational design but differ in configuration and target platform. Both belong to the Core Ultra Series 2 family and are manufactured by TSMC on a 3 nm process node. The Core Ultra 5 250KF Plus uses the Arrow Lake Refresh codename, while the Core Ultra 9 285H uses Arrow Lake-H.

Core counts differ significantly. The desktop part has 18 cores and 18 threads, all of which appear to be performance-oriented given the lack of a thread-doubling feature. The mobile part has 16 cores and 16 threads. The desktop chip has a base clock of 4.20 GHz and a boost clock of 5.30 GHz. The mobile chip has a base clock of 2.90 GHz and a boost clock of 5.40 GHz. The boost clock advantage of 0.10 GHz belongs to the mobile part, but the desktop part has a substantially higher base clock.

Cache hierarchies are similar in structure but differ in total capacity. Both CPUs use 192 KB of L1 cache per core and 3 MB of L2 cache per core. The shared L3 cache is 30 MB on the desktop part versus 24 MB on the mobile part. This 6 MB difference in shared cache contributes to the desktop processor's performance advantage in cache-sensitive workloads.

Memory support shows a split. The desktop chip supports DDR5 over a dual-channel bus with 115.2 GB/s of memory bandwidth. The mobile chip supports both DDR5 and LPDDR5X over a dual-channel bus with 102.4 GB/s of bandwidth. The desktop part offers 12.8 GB/s more memory bandwidth. Both processors support ECC memory.

PCIe connectivity differs substantially. The desktop part provides Gen 5 with 20 lanes from the CPU, while the mobile part provides Gen 5 with only 8 lanes. The desktop part has no integrated graphics, listing N/A for iGPU, while the mobile part includes Arc Graphics 140T. The desktop processor has an unlocked multiplier, enabling overclocking, while the mobile processor is locked. The desktop chip uses Intel Socket 1851, and the mobile chip uses Intel BGA 2049. The desktop part contains 17,800 million transistors on a 243 mm² die; transistor count and die size for the mobile part are not recorded in the database.

Head-to-Head Benchmarks

The Core Ultra 5 250KF Plus dominates every recorded benchmark, but the margins vary widely by workload. The largest single-core advantage appears in Cinebench R23 single-core, where the desktop chip scores 6030 against 2129.5, a 183.2% difference. Cinebench R15 single-core shows a 93.9% advantage, with scores of 607 versus 313. The Cinebench R20 single-core test shows a 47% advantage, 2532 versus 1722. These results indicate a dramatic per-thread performance gap, driven by the desktop chip's higher base clock and likely higher sustained power delivery.

Multicore Cinebench results reinforce the same pattern. Cinebench R23 multicore shows the desktop part at 42718 versus 20781.5, a 105.6% advantage. Cinebench R20 multicore shows 17941 versus 12201, a 47% advantage. Cinebench R15 multicore shows 4305 versus 3177.5, a 35.5% advantage. The R23 result is particularly striking because the desktop part more than doubles the mobile part's score.

PassMark workloads reveal consistent but smaller advantages. Integer math shows 123030 versus 85922, a 43.2% advantage. Floating point math shows 159824 versus 109190, a 46.4% advantage. Extended instructions show 42880 versus 26794, a 60% advantage. Data compression shows 553155 versus 335859, a 64.7% advantage. Random string sorting shows 67209 versus 40931, a 64.2% advantage. Data encryption shows 41292 versus 26140, a 58% advantage. Find prime numbers shows 452 versus 330, a 37% advantage. Multithread shows 50146 versus 34171, a 46.8% advantage. Physics shows 3183 versus 2513, a 26.7% advantage.

The narrowest margin appears in PassMark single-thread, where the desktop chip scores 4698 versus 4415, a 6.4% advantage. This is the only benchmark where the mobile part comes close, suggesting that the 285H has competitive single-thread capability when boosted to 5.40 GHz. However, the desktop chip still wins even this test.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra 5 250KF Plus has 18 cores and 18 threads. The Intel Core Ultra 9 285H has 16 cores and 16 threads. The desktop part has 2 more cores and 2 more threads.

Q: What is the average benchmark score difference between the two CPUs?

A: The Core Ultra 5 250KF Plus has an average benchmark score of 66159, while the Core Ultra 9 285H has an average score of 38312. The desktop part scores 27847 points higher on average.

Q: Does the Core Ultra 9 285H have integrated graphics?

A: Yes, the Core Ultra 9 285H includes Arc Graphics 140T. The Core Ultra 5 250KF Plus has no integrated graphics, listed as N/A.

Q: Which processor has a higher boost clock?

A: The Core Ultra 9 285H has a boost clock of 5.40 GHz, which is 0.10 GHz higher than the Core Ultra 5 250KF Plus at 5.30 GHz. Despite this, the desktop part wins all single-thread benchmarks.

Q: Are both processors manufactured on the same process node?

A: Yes, both are manufactured by TSMC on a 3 nm process node. Both belong to the Core Ultra Series 2 family.

Q: Which processor supports ECC memory?

A: Both processors support ECC memory. The desktop part supports DDR5 with 115.2 GB/s bandwidth, and the mobile part supports DDR5 and LPDDR5X with 102.4 GB/s bandwidth.

Where Each One Wins

The Intel Core Ultra 5 250KF Plus wins in every measured category. For desktop users, the advantages are substantial. Cinebench R23 multicore shows a 105.6% advantage, meaning the desktop chip delivers more than double the render performance of the mobile part. Data compression shows a 64.7% advantage, making it the better choice for archiving, backup, and storage-heavy workflows. Data encryption shows a 58% advantage, which benefits secure communications and encrypted storage operations. Integer math shows a 43.2% advantage, and floating point math shows a 46.4% advantage, both relevant for scientific computing and financial modeling. The physics workload shows a 26.7% advantage, which is the smallest multicore margin but still a clear win.

The Core Ultra 9 285H does not win any recorded benchmark. Its role is defined by its platform rather than its performance relative to the desktop chip. As a mobile processor with a 45 W TDP and integrated Arc Graphics 140T, it fits into laptops where the 250KF Plus cannot be installed due to socket and power constraints. Its 5.40 GHz boost clock gives it competitive single-thread performance within its segment, as shown by the 6.4% gap in PassMark single-thread. The 285H also supports LPDDR5X memory, which is a mobile-specific feature not available on the desktop part.

The nearest rival data frames each chip within its own market. The 250KF Plus sits alongside the Intel Core 9 273PQE and AMD Ryzen 9 7950X3D, with deltas of 0.1% and 0.4% respectively. The 285H sits alongside the Intel Core 9 270H and Intel Core i5-13600HX, with deltas of 0.1% in both directions. The desktop chip belongs in a desktop build with a dedicated GPU, given its lack of integrated graphics. The mobile chip belongs in a laptop, where its integrated graphics and lower TDP are essential. The recorded data does not support any scenario where the 285H outperforms the 250KF Plus, but the 285H remains the only viable option for mobile form factors.