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

Where Each One Wins

The benchmark data presents an unusual split. The Intel Core Ultra 7 265KF claims victory in 15 of the 17 head-to-head comparisons, while the Intel Core Ultra 9 285 takes only 2 wins. This runs counter to the naming hierarchy, where the Ultra 9 typically sits above the Ultra 7. The data shows the Ultra 7 265KF is the stronger performer across most measured workloads, despite having fewer cores.

The Ultra 9 285 wins in floating-point math and integer math. The floating-point result is 194,988 against 189,431, a 2.9% advantage. The integer math win is more decisive: 164,869 versus 143,351, a 15% margin. These two workloads suggest the Ultra 9's additional cores deliver meaningful throughput in pure arithmetic operations. The Ultra 9 also carries a higher boost clock of 5.60 GHz versus 5.50 GHz, which may contribute to its edge in these compute-heavy tasks.

The Ultra 7 265KF dominates everywhere else. In Cinebench tests, it wins all six variants (R15, R20, R23, both single-core and multi-core) by a consistent 1.6% margin. Its single-core scores of 707 (R15), 2,948 (R20), and 7,021 (R23) all top the Ultra 9's 696, 2,901, and 6,909 respectively. This consistency indicates the 265KF has a slight architectural advantage in clock-for-clock performance, likely due to its higher base clock of 3.90 GHz versus 2.50 GHz.

PassMark tests further cement the Ultra 7's position. Data compression shows a 9.7% lead (666,589 versus 602,121), extended instructions show a 16.8% lead (54,513 versus 45,357), and random string sorting shows a 7.6% lead (79,735 versus 73,651). The Ultra 7 also wins multithread (58,518 versus 56,602), physics (3,633 versus 3,598), and data encryption (48,198 versus 46,949).

The use-case split is clear: the Ultra 9 285 is the choice for integer-heavy and floating-point-heavy compute, such as scientific simulations or financial modeling. The Ultra 7 265KF is better for general productivity, compression, encryption, and single-threaded responsiveness. The data shows the 265KF is the more versatile processor for typical desktop workloads, while the 285 serves a narrower but specialized role.

FAQ

Q: Which processor has more cores?

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

Q: Does the Ultra 9 285 support ECC memory?

A: Yes, the Ultra 9 285 supports ECC memory. The Ultra 7 265KF does not support ECC memory.

Q: Which processor has integrated graphics?

A: The Ultra 9 285 includes Arc Xe-LPG Graphics with 64 execution units. The Ultra 7 265KF has no integrated graphics, as indicated by the "N/A" field.

Q: What is the launch MSRP difference?

A: The Ultra 9 285 has a launch MSRP of $579. The Ultra 7 265KF has a launch MSRP of $379.

Q: Which processor is unlocked for overclocking?

A: The Ultra 7 265KF has an unlocked multiplier. The Ultra 9 285 does not.

Q: How do their average benchmark scores compare?

A: The Ultra 9 285 has an average benchmark score of 75,488, placing it in the 95th percentile of all CPUs. The Ultra 7 265KF has an average score of 71,910, placing it in the 94th percentile. The Ultra 9's nearest rival, the AMD EPYC 8224P, scores 75,582 (0.1% higher), while the Ultra 7's nearest rival, the AMD Ryzen 7 8840HX, scores 71,797 (0.2% higher).

Head-to-Head Benchmarks

The most striking result is the near-total sweep by the Ultra 7 265KF. In Cinebench R23 multi-core, the 265KF scores 49,736 against the 285's 48,945, a 1.6% advantage. This is counterintuitive given the 285 has four more cores. The same 1.6% delta appears in every Cinebench test, from R15 multi-core (5,013 versus 4,933) to R20 single-core (2,948 versus 2,901). The consistency suggests a fixed clock-speed or IPC advantage rather than workload-specific behavior.

PassMark data compression shows a larger gap: 666,589 versus 602,121, a 9.7% win for the 265KF. Extended instructions widen further to 16.8% (54,513 versus 45,357). Random string sorting shows 79,735 versus 73,651, a 7.6% margin. These are substantial deltas that indicate the 265KF handles memory-intensive and instruction-diverse workloads more efficiently.

The Ultra 9 285's wins are isolated but notable. PassMark integer math shows a 15% advantage (164,869 versus 143,351), the largest single delta in either direction. Floating-point math shows 194,988 versus 189,431, a 2.9% win. These results suggest the 285's extra cores scale well with parallel arithmetic operations, even if they do not help in other multi-threaded workloads.

The overall multithread PassMark score favors the 265KF at 58,518 versus 56,602, a 3.3% margin. Single-thread scores favor the 265KF at 4,928 versus 4,881, a 1% margin. Physics and prime number tests also go to the 265KF, with 3,633 versus 3,598 and 486 versus 459 respectively. The data indicates that the 265KF is the faster chip in 15 of 17 measured scenarios, with the 285's wins confined to pure math throughput.

Specification Differences

The two processors share many fundamentals: both use Intel Socket 1851, both are Arrow Lake-S architecture, both are built on a 3 nm process by TSMC, both have 17,800 million transistors, both have a 243 mm² die size, both support DDR5 memory, both use dual-channel memory buses, both have 102.4 GB/s memory bandwidth, and both offer PCIe Gen 5 with 20 lanes (CPU only). They also share the same L1 cache at 192 KB per core and L2 cache at 3 MB per core.

The differences are as follows. Core count: 24 versus 20. Thread count: 24 versus 20. Base clock: 2.50 GHz versus 3.90 GHz. Boost clock: 5.60 GHz versus 5.50 GHz. TDP: 65 watts versus 125 watts. L3 cache: 36 MB shared versus 30 MB shared. ECC memory support: true versus false. Integrated graphics: Arc Xe-LPG Graphics 64EU versus N/A. Multiplier unlocked: false versus true. Launch MSRP: $579 versus $379. Release date: the 285 released on 2024-12-31, while the 265KF released on 2024-10-23. Part numbers: SRQD4 versus SRQCU.

The base clock difference is dramatic: 3.90 GHz on the 265KF versus 2.50 GHz on the 285. This explains the single-thread and multi-thread wins for the 265KF despite its lower core count. The 285 compensates with a higher boost clock (5.60 versus 5.50) and more L3 cache (36 MB versus 30 MB), but the data shows these advantages do not translate into benchmark victories outside math workloads.

Architecture Differences

Both processors are built on the Arrow Lake architecture, specifically Arrow Lake-S, and both are fabricated on a 3 nm process at TSMC. They share the same transistor count of 17,800 million and the same die size of 243 mm², indicating they are likely the same silicon die with different configurations. The foundry and process node are identical, so architectural differences come down to what is enabled or disabled on the die.

The Ultra 9 285 has 24 cores versus 20 on the Ultra 7 265KF, a difference of four cores. Both support 1 thread per core, so thread counts match core counts. The L1 cache is identical at 192 KB per core, and L2 is identical at 3 MB per core, which means per-core cache allocation is the same. The L3 cache differs: 36 MB on the 285 versus 30 MB on the 265KF, a 6 MB difference that scales with the core count.

The 285 includes integrated Arc Xe-LPG Graphics with 64 execution units, while the 265KF has no integrated graphics. This is a key architectural feature difference. The 265KF's "KF" designation indicates a lack of graphics, while the 285 is a fully integrated part. The 285 also supports ECC memory, which the 265KF does not, making it suitable for workstation or error-sensitive environments.

The 265KF has an unlocked multiplier, allowing user overclocking, while the 285 is locked. The 265KF's higher TDP of 125 watts versus 65 watts reflects its higher base clock and suggests it is configured for sustained performance without the power constraints of the 285. The 285's lower TDP indicates it is designed for efficiency, yet the data shows the 265KF outperforms it in most benchmarks despite the higher power envelope. The architecture is the same, but the binning and feature configuration clearly favor the 265KF for raw performance in everyday workloads.