Intel Core Ultra 7 265KF vs Intel Core Ultra X9 388H Comparison

Head-to-Head Benchmarks

The recorded data shows a complete sweep for the Intel Core Ultra 7 265KF across all 17 head-to-head benchmark comparisons, with zero wins for the Intel Core Ultra X9 388H. The margins, however, vary dramatically by workload type, which makes the comparison more nuanced than a simple victory count.

The largest single-core advantage appears in Cinebench R23 single-core, where the 265KF scores 7021 against 2200.5 for the 388H, a delta of 219.1%. This is the most extreme gap in the entire dataset and indicates a fundamental difference in how the two processors handle lightly threaded workloads. Cinebench R15 single-core shows a similar pattern, with the 265KF at 707 versus 309.5, a 128.4% lead. The Cinebench R20 single-core test narrows that gap considerably, with the 265KF at 2948 and the 388H at 1849, a 59.4% advantage.

Multi-core results tell a clearer story about sustained throughput. In Cinebench R23 multi-core, the 265KF records 49736 points against 18911 for the 388H, a 163% difference. Cinebench R15 multi-core shows the 265KF at 5013 versus 2955, a 69.6% lead, while Cinebench R20 multi-core has the 265KF at 20889 and the 388H at 13101, a 59.4% gap. The PassMark multithread test shows the 265KF at 58518 and the 388H at 36811, a 59% difference.

Real-world data processing workloads follow the same direction but with varying intensity. PassMark data compression gives the 265KF 666589 points versus 361763 for the 388H, an 84.3% advantage. Data encryption shows 48198 against 28490, a 69.2% lead. Extended instructions score 54513 versus 29943, an 82.1% gap. Random string sorting shows 79735 against 44010, an 81.2% advantage. Integer math delivers 143351 versus 90882, a 57.7% lead.

The closest margins appear in physics and single-thread tests. PassMark physics has the 265KF at 3633 and the 388H at 3226, a modest 12.6% lead. PassMark single-thread shows 4928 versus 4280, a 15.1% advantage. Floating point math gives the 265KF 189431 points against 112550, a 68.3% lead. Find prime numbers shows 486 versus 358, a 35.8% difference.

Architecture Differences

The two processors come from different generations and target different market segments entirely. The Intel Core Ultra 7 265KF belongs to the Core Ultra Series 2, uses the Arrow Lake architecture with the Arrow Lake-S codename, and is a desktop part on Intel Socket 1851. The Intel Core Ultra X9 388H belongs to the Core Ultra Series 3, uses the Panther Lake architecture with the Panther Lake-H codename, and is a mobile part on Intel BGA 2540.

Both are built on a 3 nm process node, but the foundry differs. The 265KF is fabricated by TSMC, while the 388H is fabricated by Intel. The 265KF has a die size of 243 mm² and contains 17,800 million transistors. The 388H has no recorded die size or transistor count in the database.

Core and thread counts favor the desktop part. The 265KF offers 20 cores and 20 threads, while the 388H offers 16 cores and 16 threads. Neither processor uses simultaneous multithreading. Base and boost clocks also differ substantially: the 265KF runs at 3.90 GHz base and 5.50 GHz boost, while the 388H runs at 2.10 GHz base and 5.10 GHz boost.

Cache configuration is shared in part. Both processors use 192 KB of L1 cache per core and 3 MB of L2 cache per core. The L3 cache differs: the 265KF has 30 MB shared, while the 388H has 18 MB shared.

Memory support separates the two further. The 265KF supports DDR5 memory on a dual-channel bus with 102.4 GB/s of bandwidth. The 388H supports LPDDR5X on a dual-channel bus with 153.6 GB/s of bandwidth, a higher figure despite the mobile positioning. Neither supports ECC memory.

PCIe lanes differ by a wide margin. The 265KF provides Gen 5 with 20 lanes (CPU only), while the 388H provides Gen 5 with 4 lanes (CPU only). Integrated graphics also split the pair: the 265KF has no integrated graphics, while the 388H includes Arc B390 graphics.

Power and thermal design points are far apart. The 265KF has a TDP of 125 watts, while the 388H has a TDP of 25 watts. The multiplier is unlocked on the 265KF but locked on the 388H. The 265KF carries a launch MSRP of $379; no launch MSRP is recorded for the 388H. The 265KF was released on 2024-10-23, while the 388H was released on 2026-01-04.

Where Each One Wins

The Intel Core Ultra 7 265KF wins every recorded benchmark, so the analysis of "where each one wins" comes down to the magnitude of the advantage and the context of the workload.

The 265KF dominates in multi-core rendering workloads. The Cinebench R23 multi-core result of 49736 versus 18911, a 163% lead, indicates that heavily threaded production tasks such as 3D rendering, video encoding, and scientific simulation will see the largest benefit. The Cinebench R15 multi-core gap of 69.6% and the R20 multi-core gap of 59.4% reinforce this pattern.

The 265KF also excels in data processing and compression tasks. The PassMark data compression score of 666589 against 361763, an 84.3% advantage, and the random string sorting score of 79735 versus 44010, an 81.2% lead, suggest that archiving, database operations, and file manipulation workloads run substantially faster on the desktop part.

The 388H is not without areas of relative strength. Its closest margins come in single-thread performance and physics simulation. The PassMark single-thread score of 4280 versus 4928, a 15.1% gap, shows that the mobile part is comparatively competitive in lightly threaded tasks. The PassMark physics score of 3226 versus 3633, a 12.6% gap, is the smallest difference in the entire dataset.

The 388H also brings integrated Arc B390 graphics, which the 265KF lacks entirely. The 388H's higher memory bandwidth of 153.6 GB/s versus 102.4 GB/s for the 265KF indicates that memory-intensive workloads on the mobile platform have a bandwidth advantage, even if the overall compute performance is lower.

The database places the 265KF at the 94th percentile among all CPUs, with an average benchmark score of 71910. The 388H sits at the 88th percentile, with an average benchmark score of 44466. The nearest rivals for the 265KF include the AMD Ryzen 7 8840HX at 71797 (0.2% slower), the Intel Xeon 6517P at 72350 (0.6% faster), the Intel Xeon 6724P at 72396 (0.7% faster), and the Intel Xeon Platinum 8270 at 71370 (0.8% slower). The nearest rivals for the 388H include the AMD Ryzen 5 7500X3D at 44573 (0.2% faster), the Intel Core i9-13950HX at 44342 (0.3% slower), the AMD Ryzen AI Max 385 at 44309 (0.4% slower), and the Intel Core i5-13600 at 44240 (0.5% slower).

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra 7 265KF has 20 cores and 20 threads. The Intel Core Ultra X9 388H has 16 cores and 16 threads.

Q: What is the largest performance gap between the two?

A: The largest gap is in Cinebench R23 single-core, where the 265KF scores 7021 versus 2200.5 for the 388H, a 219.1% advantage.

Q: Does either processor include integrated graphics?

A: The Intel Core Ultra X9 388H includes Arc B390 integrated graphics. The Intel Core Ultra 7 265KF has no integrated graphics.

Q: What memory types do the two processors support?

A: The 265KF supports DDR5 memory with 102.4 GB/s of bandwidth. The 388H supports LPDDR5X memory with 153.6 GB/s of bandwidth. Both use a dual-channel memory bus.

Q: How close is the 388H to the 265KF in any benchmark?

A: The closest result is PassMark physics, where the 388H scores 3226 against 3633 for the 265KF, a 12.6% gap. The PassMark single-thread test is the next closest at 15.1%.

Q: What are the launch dates for the two processors?

A: The Intel Core Ultra 7 265KF was released on 2024-10-23. The Intel Core Ultra X9 388H was released on 2026-01-04.

The Verdict

The data presents a one-sided comparison. The Intel Core Ultra 7 265KF wins all 17 recorded head-to-head benchmarks, with an average benchmark score of 71910 against 44466 for the Intel Core Ultra X9 388H, a difference of roughly 62% based on the average scores.

The 265KF is the clear choice for desktop workloads that demand maximum multi-core throughput, single-core responsiveness, and data processing speed. Its 20 cores, 5.50 GHz boost clock, 30 MB L3 cache, and 125-watt TDP position it as a high-performance desktop processor. The 163% lead in Cinebench R23 multi-core and the 219.1% lead in Cinebench R23 single-core confirm that rendering and lightly threaded applications both benefit substantially.

The 388H, despite losing every benchmark, serves a different purpose. Its 25-watt TDP, mobile BGA 2540 socket, integrated Arc B390 graphics, and higher memory bandwidth of 153.6 GB/s indicate a processor designed for mobile systems where power efficiency and graphics capability matter more than raw compute. Its 88th percentile ranking and average score of 44466 place it among capable mobile processors, and its nearest rivals include the AMD Ryzen 5 7500X3D at 44573 and the Intel Core i9-13950HX at 44342.

The choice comes down to platform and workload. Desktop users who need maximum processor performance should select the 265KF. Mobile users who require integrated graphics and lower power draw will use the 388H, accepting the performance trade-off documented in these benchmark results. The 12.6% gap in PassMark physics and the 15.1% gap in single-thread performance show that the mobile part is not far behind in certain specific tasks, but the overall compute advantage of the desktop part is decisive.