Intel Core i9-13900KF vs Intel Core Ultra 7 265 Comparison

Where Each One Wins

The Intel Core Ultra 7 265 and Intel Core i9-13900KF are both desktop processors in the 93rd percentile of all CPUs in the database, yet they achieve that standing through very different workload profiles. The head-to-head data records 17 benchmark comparisons, with the i9-13900KF taking 13 wins and the Ultra 7 265 taking 4. That split tells a clear story: the older Raptor Lake flagship dominates the broad majority of compute tasks, while the newer Arrow Lake part carves out specific niches where its architecture excels.

The i9-13900KF is the clear choice for heavily multithreaded productivity. Its wins come across Cinebench R15, R20, and R23 in both single-core and multi-core runs, plus PassMark data compression, data encryption, extended instructions, integer math, multithread, physics, and random string sorting. The largest margin is a 69.5% lead in Cinebench R20 multi-core, where it scores 20519 against 6268. That is not a small edge; it is a generational gap in raw throughput for rendering and similar workloads.

The Ultra 7 265 wins in four specific tests: PassMark find prime numbers with a massive 85.8% lead, floating point math with a 14.5% advantage, and both PassMark single-thread variants with a slim 2.3% edge. The prime number result (418 versus 225) suggests the Arrow Lake architecture handles certain integer-heavy algorithmic patterns far more efficiently, while the floating point win points to a different instruction execution pipeline. The single-thread PassMark win is modest but meaningful, as it shows the newer design can edge out a higher-clocked rival in at least one general single-threaded metric.

Architecture Differences

The two processors come from different Intel architectures and foundries. The Core Ultra 7 265 is built on Arrow Lake-S, a 3 nm process from TSMC, while the Core i9-13900KF uses Raptor Lake-S on Intel's 10 nm process. The Ultra 7 packs 17,800 million transistors into a 243 mm² die; the i9-13900KF has a 257 mm² die with no transistor count recorded in the database. The Ultra 7 is the denser design despite having fewer cores.

Core configuration differs significantly. The Ultra 7 265 has 20 cores and 20 threads, meaning no hyperthreading; the i9-13900KF has 24 cores and 32 threads, so it uses simultaneous multithreading. The i9 therefore offers 60% more threads, which directly explains much of its multithreaded benchmark dominance. Clock speeds also favor the i9: its base clock is 3.00 GHz with a boost of 5.80 GHz, versus 2.40 GHz base and 5.30 GHz boost for the Ultra 7. The i9 also carries a 125 W TDP against 65 W for the Ultra 7, a substantial power envelope difference.

Cache hierarchies diverge as well. The Ultra 7 has 192 KB of L1 per core and 3 MB of L2 per core, with 30 MB of shared L3. The i9-13900KF has 80 KB of L1 per core, 2 MB of L2 per core, and 36 MB of shared L3. So the Ultra 7 gives each core more private cache, while the i9 offers more shared L3 overall. Memory support differs: the Ultra 7 supports DDR5 only with 102.4 GB/s bandwidth, while the i9 supports both DDR4 and DDR5 with no bandwidth figure recorded. ECC memory is supported on the i9 but not on the Ultra 7.

The Ultra 7 includes integrated Arc Xe-LPG Graphics with 32 execution units; the i9-13900KF has no integrated graphics, as the KF suffix indicates. Both use Intel Socket platforms, but different ones: Socket 1851 for the Ultra 7 and Socket 1700 for the i9. The Ultra 7 has a locked multiplier, while the i9-13900KF has an unlocked multiplier for overclocking. Both support PCIe Gen 5 with 20 CPU lanes. The Ultra 7 launched on January 6, 2025 with a launch MSRP of $394. The i9-13900KF launched on September 26, 2022 with a launch MSRP of $564.

Head-to-Head Benchmarks

The most dramatic difference appears in Cinebench R20. The i9-13900KF scores 20519 in multi-core versus 6268 for the Ultra 7, a 69.5% margin. The R20 single-core run shows the same 69.5% gap, with 2896 against 884. These are the largest deltas in the entire head-to-head set, and they dwarf the R15 and R23 gaps. The R15 multi-core result is 4924 versus 4255, a 13.6% lead for the i9; R15 single-core is 695 versus 600, also 13.7%. R23 multi-core shows 48855 versus 42216, again 13.6%, and R23 single-core is 6897 versus 5960, another 13.6%. The consistent 13.6% to 13.7% margins across R15 and R23 suggest a stable performance ratio, while the R20 outlier points to something unusual in how that specific workload interacts with the two architectures.

PassMark results add texture. Data compression strongly favors the i9 at 786218 versus 522983, a 33.5% lead. Integer math gives the i9 a 34.8% edge with 206859 against 134773. Random string sorting goes to the i9 by 26.2% (86510 versus 63833). Multithread overall favors the i9 by 13.9% (57729 versus 49682). Data encryption is closer, 46186 versus 40456, a 12.4% margin. Extended instructions favor the i9 by 10% (46084 versus 41478). Physics is nearly tied, 2956 versus 2923, only 1.1% apart.

The Ultra 7's wins are concentrated and significant. Find prime numbers shows an 85.8% advantage (418 versus 225), the single largest percentage win for either processor in any test. Floating point math gives the Ultra 7 a 14.5% lead (172776 versus 150869). The PassMark single-thread score is 4689 versus 4584, a 2.3% edge. The average benchmark scores reflect the overall balance: the Ultra 7 averages 64640 with nearest rivals AMD EPYC 4464P at 64823 (0.3% behind), Intel Core Ultra 7 265F at 64438 (0.3% ahead), AMD EPYC 7343 at 64202 (0.7% ahead), and AMD EPYC 9124 at 65104 (0.7% behind). The i9-13900KF averages 61841 with nearest rivals Intel Core Ultra 7 270HX Plus at 61834 (even), Intel Core i9-13900K at 61766 (0.1% ahead), Intel Core i9-13900T at 61723 (0.2% ahead), and Intel Xeon 636 at 61360 (0.8% ahead).

FAQ

Q: Which processor is faster in Cinebench R23 multi-core?

A: The Intel Core i9-13900KF scores 48855 versus 42216 for the Core Ultra 7 265, a 13.6% lead for the i9.

Q: Does the Core Ultra 7 265 win any benchmarks?

A: Yes, it wins PassMark find prime numbers by 85.8% (418 versus 225), floating point math by 14.5% (172776 versus 150869), and PassMark single-thread by 2.3% (4689 versus 4584).

Q: What are the core and thread counts for each?

A: The Core Ultra 7 265 has 20 cores and 20 threads. The Core i9-13900KF has 24 cores and 32 threads.

Q: Which processor supports ECC memory?

A: The Core i9-13900KF supports ECC memory. The Core Ultra 7 265 does not.

Q: Do both processors have integrated graphics?

A: No. The Core Ultra 7 265 includes Arc Xe-LPG Graphics with 32 execution units. The Core i9-13900KF has no integrated graphics.

Q: What is the largest single benchmark margin between the two?

A: The i9-13900KF leads by 69.5% in Cinebench R20 multi-core and single-core. The Ultra 7 leads by 85.8% in PassMark find prime numbers, the largest percentage margin in either direction.

The Verdict

The data points to a clear split by workload type. The Intel Core i9-13900KF is the stronger processor for most multithreaded and single-threaded rendering tasks, compression, integer math, encryption, and general productivity. Its 69.5% lead in Cinebench R20 multi-core and 33.5% lead in data compression are decisive. Users running Cinebench-style workloads, data compression pipelines, or integer-heavy calculations should favor the i9-13900KF.

The Core Ultra 7 265 makes its case in specific niches. The 85.8% lead in find prime numbers suggests an architecture that handles certain algorithmic patterns far more efficiently. The 14.5% floating point advantage and the 2.3% single-thread PassMark win show it is not simply a weaker chip across the board. For workloads that match its strengths, particularly prime number calculations and floating point math, the Ultra 7 265 is the better choice.

The i9-13900KF also offers practical advantages beyond raw speed: ECC memory support, an unlocked multiplier for overclocking, and support for both DDR4 and DDR5 memory. The Ultra 7 counters with integrated graphics, a smaller 65 W TDP, a denser 3 nm TSMC process, and a lower launch MSRP of $394 against $564. The i9's higher launch MSRP reflects its positioning as a flagship part.

For buyers who need maximum throughput in rendering and compression, the i9-13900KF is the data-backed pick. For buyers with workloads centered on prime number computation, floating point math, or who value the integrated graphics and lower power envelope of the newer Arrow Lake design, the Core Ultra 7 265 is the appropriate selection. The physics result, only 1.1% apart, shows the two are closely matched in at least one area, but the overall benchmark record favors the i9-13900KF in the majority of tests.