Intel Core Ultra 5 250KF Plus vs Intel Core Ultra 7 265H Comparison

The Intel Core Ultra 5 250KF Plus and the Intel Core Ultra 7 265H represent two distinct interpretations of the Core Ultra Series 2 design. The data shows a clear performance hierarchy, with the desktop-oriented 250KF Plus winning all 17 head-to-head benchmark comparisons against the mobile-focused 265H. However, the two processors are engineered for entirely different physical environments, which explains the significant performance gap. This analysis breaks down the recorded benchmark results, architectural differences, and the use-case scenarios each chip is designed to serve.

Where Each One Wins

The benchmark database records a perfect sweep for the Intel Core Ultra 5 250KF Plus, with 17 wins out of 17 head-to-head tests. The 265H does not secure a single victory in any measured workload. This outcome is expected given the fundamental positioning of the two parts: the 250KF Plus is a desktop processor with a 125 W TDP, while the 265H is a mobile processor with a 28 W TDP.

The largest margins for the 250KF Plus appear in multi-threaded and single-threaded rendering workloads. In Cinebench R23, the 250KF Plus scores 42718 in multi-core and 6030 in single-core, compared to 19940 and 2080 for the 265H, respectively. These represent deltas of 114.2% and 189.9%, the two biggest wins in the entire comparison. The single-core delta is particularly striking, indicating that the desktop part's higher base clock and power headroom translate into substantially higher per-thread throughput.

In PassMark workloads, the 250KF Plus leads by margins ranging from 27.5% in physics to 65.3% in data compression. The smallest advantage is in single-thread performance, where the 250KF Plus scores 4698 against 4334 for the 265H, a delta of only 8.4%. This suggests that while the desktop chip is faster in every measured category, its advantage narrows considerably when only one thread is active, likely due to both processors sharing the same 5.30 GHz boost clock.

The 265H, despite losing every comparison, still holds its own as a capable mobile processor. Its average benchmark score of 41621 places it in the 88th percentile of all CPUs in the database, with nearest rivals including the Intel Core 7 251TE, Intel Core i7-14650HX, and AMD Ryzen 9 5900X. The data indicates that the 265H is a strong performer within its power class, but it simply cannot match the raw throughput of a higher-power desktop part.

Architecture Differences

Both processors are built on the Arrow Lake architecture and manufactured by TSMC on a 3 nm process node. The 250KF Plus uses the Arrow Lake Refresh codename, while the 265H uses Arrow Lake-H. Both feature the same L1 cache configuration of 192 KB per core and the same L2 cache of 3 MB per core.

The core configurations differ. The 250KF Plus has 18 cores and 18 threads, while the 265H has 16 cores and 16 threads. Neither processor uses simultaneous multithreading. The 250KF Plus offers 30 MB of shared L3 cache, while the 265H offers 24 MB. This gives the desktop chip 6 MB more shared cache, which can benefit workloads that frequently access a large working set.

Clock speeds show a significant divergence. The 250KF Plus has a base clock of 4.20 GHz and a boost clock of 5.30 GHz. The 265H has a base clock of 2.20 GHz and the same 5.30 GHz boost clock. The 2.00 GHz difference in base clock is substantial and directly contributes to the performance gap, especially in sustained multi-threaded workloads where the mobile chip cannot maintain high frequencies due to thermal and power constraints.

The TDP ratings reflect their intended environments. The 250KF Plus has a 125 W TDP and uses the Intel Socket 1851. The 265H has a 28 W TDP and uses the Intel BGA 2049 socket, which is soldered to the motherboard. The desktop part has an unlocked multiplier, while the mobile part is locked.

Memory support also differs. The 250KF Plus supports DDR5 with a dual-channel memory bus and a recorded memory bandwidth of 115.2 GB/s. The 265H supports both DDR5 and LPDDR5X, also with a dual-channel bus, but its memory bandwidth is recorded at 102.4 GB/s. Both support ECC memory.

PCIe lane availability is another differentiator. The 250KF Plus provides Gen 5 with 20 CPU-only lanes, while the 265H provides Gen 5 with 8 CPU-only lanes. The 250KF Plus has no integrated graphics, while the 265H includes Arc Graphics 140T. The 250KF Plus has a launch MSRP of $184 and was released on 2026-03-10, while the 265H was released on 2025-01-12.

The Verdict

The data presents a clear separation of purpose. The Intel Core Ultra 5 250KF Plus is designed for desktop systems where power draw and cooling are secondary considerations. Its 125 W TDP, 18 cores, and 5.30 GHz boost clock allow it to dominate in all recorded benchmark categories, from Cinebench rendering to PassMark integer math.

The Intel Core Ultra 7 265H is designed for mobile platforms where power efficiency is paramount. Its 28 W TDP and 16 cores make it suitable for laptops, and its integrated Arc Graphics 140T eliminates the need for a discrete GPU in many configurations. The 88th percentile ranking among all CPUs confirms that it is no slouch, and its nearest rivals include desktop processors like the AMD Ryzen 9 5900X, which it nearly matches in average score.

From the recorded data, the 250KF Plus is the clear choice for any workload that prioritizes raw performance, including multi-core rendering, data compression, and floating-point math. The 265H is the appropriate choice for a mobile system where the 28 W TDP and integrated graphics are necessary constraints. The 8.4% single-thread delta between the two chips shows that the 265H remains competitive in lightly threaded tasks, but the 114.2% multi-core delta in Cinebench R23 demonstrates the desktop part's overwhelming advantage in heavily parallel workloads.

FAQ

Q: Which processor has more cores?

A: The Intel Core Ultra 5 250KF Plus has 18 cores and 18 threads. The Intel Core Ultra 7 265H has 16 cores and 16 threads.

Q: What is the boost clock for both processors?

A: Both processors have a boost clock of 5.30 GHz. The 250KF Plus has a base clock of 4.20 GHz, while the 265H has a base clock of 2.20 GHz.

Q: Do both processors support ECC memory?

A: Yes, both the 250KF Plus and the 265H support ECC memory.

Q: Which processor has a higher memory bandwidth?

A: The 250KF Plus has a memory bandwidth of 115.2 GB/s, while the 265H has a memory bandwidth of 102.4 GB/s.

Q: What is the TDP difference between the two?

A: The 250KF Plus has a TDP of 125 W, while the 265H has a TDP of 28 W.

Q: Which processor includes integrated graphics?

A: The Intel Core Ultra 7 265H includes Arc Graphics 140T. The Intel Core Ultra 5 250KF Plus has no integrated graphics.

Head-to-Head Benchmarks

The largest single-win margin belongs to the 250KF Plus in Cinebench R23 single-core, where it scores 6030 against 2080 for the 265H, a delta of 189.9%. This result indicates that the desktop chip's higher base clock and power delivery allow it to sustain much higher single-thread frequencies than the mobile part, despite both sharing a 5.30 GHz boost clock.

In Cinebench R23 multi-core, the 250KF Plus scores 42718 versus 19940, a delta of 114.2%. This is the second-largest margin and reflects the combined effect of two additional cores, a higher base clock, and a much higher TDP envelope. The 265H's 28 W power limit prevents it from maintaining high clocks across all 16 cores under sustained load.

The data compression test shows the 250KF Plus scoring 553155 against 334711, a delta of 65.3%. Random string sorting follows closely with a 65% delta, with scores of 67209 and 40742. These memory-intensive workloads benefit from the 250KF Plus's larger 30 MB L3 cache and higher memory bandwidth of 115.2 GB/s.

In data encryption, the 250KF Plus scores 41292 against 26005, a delta of 58.8%. Extended instructions show a 60% delta, with scores of 42880 and 26805. The PassMark multi-thread test shows a 47.4% delta, with scores of 50146 and 34027. Floating-point math shows a 46.5% delta, with scores of 159824 and 109123.

Cinebench R20 shows identical deltas of 47.9% for both multi-core and single-core. The multi-core scores are 17941 and 12131, while the single-core scores are 2532 and 1712. Cinebench R15 shows a 44% delta in multi-core, with scores of 4305 and 2989, and a 97.7% delta in single-core, with scores of 607 and 307. The R15 single-core delta is notable because it is significantly larger than the R20 single-core delta, suggesting that the 265H's low base clock heavily penalizes it in short, bursty workloads.

PassMark integer math shows the 250KF Plus scoring 123030 against 85479, a delta of 43.9%. Find prime numbers shows a 34.9% delta, with scores of 452 and 335. Physics shows the smallest multi-threaded delta at 27.5%, with scores of 3183 and 2497. The single-thread test shows the overall smallest delta at 8.4%, with scores of 4698 and 4334.

The 250KF Plus's average benchmark score is 66159, placing it in the 93rd percentile of all CPUs. Its nearest rivals include the AMD Ryzen 9 7950X3D, which it leads by 0.4%, and the Intel Core Ultra 5 250K Plus, which leads it by 1%. The 265H's average score of 41621 places it in the 88th percentile, with its nearest rival being the Intel Core i7-14650HX, which it leads by 0.1%. The data confirms that both processors are competitive within their respective segments, but the desktop part operates in a different performance class altogether.