Intel Core Ultra 7 265KF vs Intel Core Ultra 9 285HX Comparison

Head-to-Head Benchmarks

The head-to-head data reveals a clear split between these two Arrow Lake processors. The Intel Core Ultra 7 265KF takes the majority of benchmark wins, securing 13 victories out of 17 recorded tests, while the Intel Core Ultra 9 285HX manages only 4 wins. However, the margins tell a more nuanced story than the raw win count.

The single-core results heavily favor the 265KF. In Cinebench R23 single-core, the 265KF scores 7021 against the 285HX's 2187.5, a massive 68.8% advantage. The Cinebench R15 single-core test shows an even wider gap, with the 265KF at 707 versus 323.5, a 54.2% lead. The 265KF also wins Cinebench R20 single-core by 3.1%, scoring 2948 compared to 2856.

Multi-core results are more mixed. The 265KF dominates Cinebench R23 multi-core with a score of 49736 versus 36429.5, a 26.8% advantage. Yet the 285HX wins Cinebench R15 multi-core, posting 5656.5 against 5013, a 12.8% lead. The Cinebench R20 multi-core test goes to the 265KF by a slim 3.1% margin, 20889 versus 20236.

The Passmark suite shows the 265KF ahead in most computational tasks. Data compression favors the 265KF at 666589 versus 631885, a 5.2% edge. Extended instructions go to the 265KF by 9.8%, with scores of 54513 and 49148. Prime number finding, floating-point math, integer math, multithread, physics, random string sorting, and single-thread tests all appear in the data. The 265KF wins prime numbers by 5.3% (486 versus 460), multithread by 2.8% (58518 versus 56902), physics by 4.3% (3633 versus 3476), random string sorting by 3.2% (79735 versus 77196), and single-thread by 6.3% (4928 versus 4618).

The 285HX counters in a few specific areas. Data encryption goes to the 285HX by a narrow 0.8% margin, 48567 versus 48198. Floating-point math favors the 285HX at 194998 versus 189431, a 2.9% gain. Integer math shows the 285HX ahead by 8.2%, with scores of 155076 and 143351.

The overall database average benchmark scores place the 285HX at 76155, which sits at the 95th percentile among all CPUs. The 265KF averages 71910, placing at the 94th percentile. The rival comparison data shows the 285HX nearly tied with the AMD Ryzen 9 8945HX, which averages 76212, a delta of only 0.1%. The 265KF sits within 0.2% of the AMD Ryzen 7 8840HX, which averages 71797.

Architecture Differences

Both processors come from the same Arrow Lake architecture family and share several fundamental characteristics. Both are built on a 3 nm process at TSMC, use 17,800 million transistors, and have a die size of 243 mm². Both support DDR5 memory with a dual-channel bus delivering 102.4 GB/s of bandwidth, and both provide PCIe Gen 5 with 20 lanes from the CPU.

The core configurations differ substantially. The 285HX packs 24 cores and 24 threads, while the 265KF has 20 cores and 20 threads. Neither processor uses hyper-threading, so thread counts equal core counts. The base clock rates differ: the 285HX runs at 2.80 GHz, while the 265KF starts at 3.90 GHz. Both boost to 5.50 GHz.

Cache allocations also diverge. Both use 192 KB of L1 per core and 3 MB of L2 per core. The shared L3 cache differs, with the 285HX offering 36 MB and the 265KF providing 30 MB. The 285HX's larger core count and L3 cache contribute to its multi-threaded performance in certain workloads.

Platform targets separate these parts. The 285HX is a mobile processor using the Intel BGA 2114 socket, carries a 55 W TDP, and includes integrated Arc Xe-LPG Graphics with 64 execution units. The 265KF is a desktop part on Intel Socket 1851, has a 125 W TDP, and no integrated graphics. The 285HX supports ECC memory, while the 265KF does not. Both have unlocked multipliers for overclocking.

Release timing differs by a few months. The 265KF launched on 2024-10-23, while the 285HX followed on 2025-01-12. The 265KF has a launch MSRP of $379. Both processors remain in active production.

The Verdict

The data points to the 265KF as the stronger processor for most tasks, particularly anything relying on single-core performance. The 68.8% lead in Cinebench R23 single-core and 54.2% lead in Cinebench R15 single-core are decisive. The 265KF also wins the longest multi-core render test, Cinebench R23 multi-core, by 26.8%. In the broader Passmark suite, the 265KF wins 8 of 11 tests, including multithread, physics, and single-thread categories.

The 285HX has specific strengths. It wins integer math by 8.2% and floating-point math by 2.9%, suggesting an advantage in certain arithmetic-heavy workloads. It also takes Cinebench R15 multi-core by 12.8%, showing that some older multi-threaded tests favor its configuration. The 285HX's larger L3 cache and extra 4 cores help in these scenarios.

For a desktop user focused on rendering, encoding, or day-to-day responsiveness, the 265KF's benchmark results make it the clear choice. The 2.6% difference in average benchmark scores, 76155 versus 71910, is modest, but the distribution of wins heavily favors the desktop part. For a mobile platform where power efficiency matters, the 285HX's 55 W TDP versus 125 W TDP represents a significant advantage, and its ECC memory support adds value for specific professional workflows.

The percentile rankings show both parts sit near the top of the database, with the 285HX at 95 and the 265KF at 94. Neither part has a rival that dramatically outclasses it. The 285HX's nearest rival is the AMD Ryzen 9 8945HX at a 0.1% delta, while the 265KF's closest competitor is the AMD Ryzen 7 8840HX at 0.2%.

FAQ

Q: Which processor has more cores?

A: The Intel Core Ultra 9 285HX has 24 cores and 24 threads, while the Intel Core Ultra 7 265KF has 20 cores and 20 threads.

Q: Which processor has a higher boost clock?

A: Both the Intel Core Ultra 9 285HX and Intel Core Ultra 7 265KF boost to 5.50 GHz.

Q: Does the Intel Core Ultra 7 265KF include integrated graphics?

A: No, the Intel Core Ultra 7 265KF has no integrated graphics. The Intel Core Ultra 9 285HX includes Arc Xe-LPG Graphics with 64 execution units.

Q: Which processor supports ECC memory?

A: The Intel Core Ultra 9 285HX supports ECC memory. The Intel Core Ultra 7 265KF does not support ECC memory.

Q: Which processor has a larger L3 cache?

A: The Intel Core Ultra 9 285HX has 36 MB of shared L3 cache, while the Intel Core Ultra 7 265KF has 30 MB of shared L3 cache.

Q: What are the power consumption differences?

A: The Intel Core Ultra 9 285HX has a TDP of 55 W, while the Intel Core Ultra 7 265KF has a TDP of 125 W.

Where Each One Wins

Intel Core Ultra 7 265KF: This is the processor for single-threaded and lightly-threaded workloads. The Cinebench R23 single-core score of 7021 versus 2187.5 demonstrates a dominant position. The 265KF also wins Cinebench R23 multi-core by 26.8%, making it the better choice for modern multi-threaded rendering. Passmark data compression, extended instructions, prime number finding, physics, and random string sorting all favor the 265KF. Its higher base clock of 3.90 GHz versus 2.80 GHz contributes to these wins. The 265KF's 125 W TDP and desktop platform indicate it is designed for sustained high performance.

Intel Core Ultra 9 285HX: This processor wins in specific mathematical workloads. Integer math shows an 8.2% advantage over the 265KF, and floating-point math gains 2.9%. Data encryption edges ahead by 0.8%. The Cinebench R15 multi-core test goes to the 285HX by 12.8%, showing that older multi-threaded benchmarks respond to its 24-core configuration. The 285HX's 55 W TDP makes it suitable for mobile platforms where power constraints matter. Its ECC memory support and integrated graphics provide features the 265KF lacks. For tasks requiring large L3 cache, the 285HX's 36 MB versus 30 MB gives it a structural advantage. The 4 wins out of 17 head-to-head tests indicate this processor excels in a narrower set of use cases.