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

Head-to-Head Benchmarks

The benchmark data shows a dominant performance profile for the Intel Core Ultra 5 250K Plus across every recorded test. Of the 17 head-to-head comparisons, the 250K Plus wins 17 and the Core Ultra 9 285H wins zero. The margins are substantial in multi-threaded workloads and narrower in single-threaded tests.

In Cinebench R15 multi-core, the 250K Plus scores 4640 versus 3177.5 for the 285H, a 46% advantage. The gap widens in Cinebench R20 multi-core, where the 250K Plus posts 18442 against 12201, a 51.2% lead. Cinebench R23 multi-core follows the same pattern: 30867 versus 20781.5, a 48.5% difference. These results indicate the desktop part delivers roughly half again the rendering throughput of the mobile processor across all three Cinebench versions.

Single-core results are closer but still favor the 250K Plus. Cinebench R15 single-core shows 328 versus 313, a 4.8% edge. Cinebench R23 single-core records 2261 versus 2129.5, a 6.2% margin. The PassMark single-thread test shows 4757 versus 4415, a 7.7% advantage. The 250K Plus leads in every single-threaded metric, but the small deltas suggest the architectures are comparable in lightly threaded work.

The PassMark suite reveals the largest disparities. Data compression scores 568721 for the 250K Plus versus 335859 for the 285H, a 69.3% difference. Random string sorting shows a 68.8% gap (69090 versus 40931). Extended instructions produce a 66.3% delta (44565 versus 26794). Data encryption is 61.2% higher (42144 versus 26140). Floating point math delivers 162692 versus 109190, a 49% lead. Integer math follows at 45.6% (125091 versus 85922). Prime number finding shows 486 versus 330, a 47.3% margin. The multithread score is 51596 versus 34171, a 51% difference, while physics trails slightly at 39% (3494 versus 2513).

The average benchmark score reflects the overall separation. The 250K Plus averages 66855, placing it in the 93rd percentile of all CPUs. The 285H averages 38312, landing in the 86th percentile. The nearest rival data confirms the positioning: the 250K Plus sits within 0.1% of the AMD EPYC 4465P (66925) and 0.2% of the Intel Xeon 6515P (67006), while trailing the Intel Core Ultra 9 275HX by 0.9% (67469). The 285H, meanwhile, is essentially tied with the Intel Core 9 270H (38335, delta -0.1%), the Intel Xeon w3-2525 (38392, delta -0.2%), and sits 0.1% ahead of the Core i5-13600HX (38261) and 0.2% ahead of the AMD Ryzen 7 250 (38221).

The Verdict

The data supports a clear division of roles. The Intel Core Ultra 5 250K Plus is the stronger processor in every measured workload, from single-threaded responsiveness to heavily parallel rendering and data processing tasks. Its 93rd percentile ranking versus the 86th percentile for the 285H summarizes the overall performance gap. The 250K Plus also holds a higher boost clock at 5.30 GHz versus 5.40 GHz for the 285H, yet still wins all single-threaded tests, indicating the desktop part's efficiency per clock is superior in the recorded benchmarks.

The 285H is a mobile processor with a 45 W TDP, while the 250K Plus carries a 125 W TDP. The power envelope difference explains much of the performance separation. The desktop chip uses more power and delivers proportionally higher scores. The mobile chip trades absolute performance for a lower power footprint, which suits portable systems where thermal and battery constraints matter more than raw throughput.

For a desktop workstation or high-performance build, the 250K Plus is the clear choice based on raw benchmark results. It is also unlocked, allowing multiplier adjustments, and supports ECC memory. The 285H is locked, uses a BGA socket, and targets laptops where upgradeability is limited. The launch MSRP for the 250K Plus is $199, while the 285H lists at $651, though pricing comparisons should not be the deciding factor in this analysis.

The 285H does offer one advantage in its integrated graphics: the Arc Graphics 140T, which is a more capable iGPU compared to the Arc Xe-LPG Graphics 64EU in the 250K Plus. For systems relying solely on integrated graphics, the mobile part may provide a better visual experience, but the CPU benchmark data does not favor it in any compute task.

Architecture Differences

The two processors share the same manufacturing foundation: both use a 3 nm process node from TSMC. They belong to the Core Ultra Series 2 family, but the desktop 250K Plus uses the Arrow Lake Refresh codename while the mobile 285H uses Arrow Lake-H. The desktop part is listed as having no explicit architecture field, while the mobile part is explicitly labeled Arrow Lake.

Core counts differ: the 250K Plus has 18 cores and 18 threads, whereas the 285H has 16 cores and 16 threads. Neither chip uses hyperthreading, so threads equal cores in both cases. The desktop part's two additional cores contribute significantly to its multi-threaded advantages, though the 46% to 51% deltas in Cinebench multi-core tests exceed the proportional core count difference, indicating clock speed and power headroom also play a role.

Cache configurations show a shared L1 design of 192 KB per core and L2 of 3 MB per core for both. The L3 cache differs: the 250K Plus has 30 MB shared, while the 285H has 24 MB shared. The extra 6 MB of L3 on the desktop part likely aids in data-heavy workloads, though the benchmark suite does not isolate cache effects directly.

Clock speeds favor the desktop part in base frequency: 4.20 GHz versus 2.90 GHz. Boost clocks are nearly identical, with the 250K Plus at 5.30 GHz and the 285H slightly higher at 5.40 GHz. The higher base clock gives the desktop chip a sustained throughput advantage under load, while the mobile chip relies on boost states to reach similar peak frequencies.

Memory support differs in scope. The 250K Plus supports DDR5 only, with dual-channel memory and a peak bandwidth of 115.2 GB/s. The 285H supports DDR5 and LPDDR5X, also dual-channel, with a slightly lower bandwidth figure of 102.4 GB/s. Both support ECC memory. PCIe connectivity also differs: the desktop part offers Gen 5 with 20 CPU lanes, while the mobile part provides Gen 5 with 8 CPU lanes.

Transistor count and die size are recorded only for the 250K Plus: 17,800 million transistors on a 243 mm² die. The 285H has no recorded values for these fields. The desktop part uses the Intel Socket 1851, while the mobile part uses Intel BGA 2049, reflecting their respective desktop and mobile form factors. The 250K Plus has an unlocked multiplier; the 285H does not.

Release dates differ by roughly 14 months. The 285H launched on 2025-01-12, while the 250K Plus launched on 2026-03-10. Both are marked as Active in production status.

FAQ

Q: Which processor has the higher multi-core Cinebench R23 score?

A: The Intel Core Ultra 5 250K Plus scores 30867, which is 48.5% higher than the Intel Core Ultra 9 285H's 20781.5.

Q: Is the Core Ultra 9 285H faster in any single-threaded test?

A: No. The 250K Plus wins all single-threaded comparisons, including PassMark single-thread (4757 versus 4415, a 7.7% lead) and Cinebench R23 single-core (2261 versus 2129.5, a 6.2% lead), despite the 285H having a slightly higher boost clock of 5.40 GHz versus 5.30 GHz.

Q: How do the average benchmark scores compare?

A: The 250K Plus averages 66855, placing it in the 93rd percentile of all CPUs. The 285H averages 38312, placing it in the 86th percentile.

Q: Do both processors support ECC memory?

A: Yes, both the 250K Plus and the 285H have ECC memory support enabled.

Q: What is the difference in L3 cache size?

A: The 250K Plus has 30 MB of shared L3 cache, while the 285H has 24 MB. Both use 192 KB L1 and 3 MB L2 per core.

Q: Which processor has more PCIe lanes?

A: The 250K Plus provides Gen 5 with 20 CPU lanes, while the 285H provides Gen 5 with 8 CPU lanes.

Q: Are the core counts the same?

A: No. The 250K Plus has 18 cores and 18 threads, while the 285H has 16 cores and 16 threads.

Where Each One Wins

The Intel Core Ultra 5 250K Plus wins in every benchmark category recorded. Its largest margins appear in data compression (69.3%), random string sorting (68.8%), and extended instructions (66.3%). These results indicate workloads involving file compression, large-scale sorting, and SIMD-heavy code will see the most dramatic differences. Data encryption also favors the desktop chip by 61.2%, making it the stronger choice for cryptographic workloads.

Multi-threaded rendering and physics simulation show consistent 39% to 51% advantages. Cinebench R20 multi-core leads with a 51.2% delta, followed by PassMark multithread at 51% and floating point math at 49%. Cinebench R23 multi-core sits at 48.5%, and prime number finding at 47.3%. Integer math trails slightly at 45.6%, while physics shows the smallest multi-threaded margin at 39%. These figures point to the 250K Plus as the better option for 3D rendering, computational physics, and general number crunching.

The single-threaded wins are narrower but consistent. PassMark single-thread shows a 7.7% lead, Cinebench R23 single-core a 6.2% lead, and Cinebench R15 single-core a 4.8% lead. Applications that rely primarily on one or two threads, such as older software, lightweight productivity tools, or certain scripting workloads, will still favor the 250K Plus, but the difference will be less pronounced.

The Core Ultra 9 285H does not win any recorded benchmark. Its strengths lie outside the measured CPU tests: it uses a 45 W TDP versus 125 W for the desktop part, making it more suitable for thermally constrained laptop chassis. It also integrates the Arc Graphics 140T, which is a more capable iGPU than the Arc Xe-LPG Graphics 64EU in the 250K Plus, and it supports both DDR5 and LPDDR5X memory. For a mobile system where battery life, heat, and integrated graphics quality matter more than raw CPU scores, the 285H has a functional purpose. For any workload measured in this database, the 250K Plus is the superior processor.