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

Intel Core Ultra 7 265F and the Intel Core i9-13900KF are both desktop processors that land in the 93rd percentile of all CPUs in the database, but they achieve that status through very different means. The Ultra 7 265F is a newer 20-core, 20-thread part built on a 3 nm process, while the i9-13900KF is a 24-core, 32-thread part from the previous generation. Benchmark results show a clear split: the i9-13900KF dominates most multi-threaded and memory-intensive tasks, while the Ultra 7 265F wins in specific math and physics workloads. This analysis breaks down where each chip wins, which one to pick for your workload, and the architectural reasons behind the performance gaps.

Where Each One Wins

The Intel Core i9-13900KF is the overall throughput champion, winning 12 of the 17 recorded head-to-head benchmarks. Its wins span the Cinebench suite, where it takes all six tests (R15, R20, and R23 in both single and multi-core) with a consistent 14.1% lead over the Ultra 7 265F. It also wins the PassMark data compression test by a wide 35.5% margin, integer math by 33.3%, random string sorting by 27.8%, data encryption by 14.5%, and extended instructions by 14.9%. The i9-13900KF also leads in PassMark multithread score by 14.4%. These results point to a processor that excels in heavy parallel workloads, file compression, and integer-heavy calculations.

The Intel Core Ultra 7 265F wins the remaining 5 benchmarks, and its victories are concentrated in specific compute patterns. It takes PassMark find prime numbers with a massive 84.9% advantage, floating point math by 15.2%, physics by 7.3%, and single-thread performance by 3.6% (both PassMark single_thread and singlethread tests). These wins indicate that the Ultra 7 265F has superior efficiency in prime-number calculations and floating-point operations, and it edges out the i9-13900KF in lightly threaded tasks. The physics score is notable because it suggests the Ultra 7 265F handles certain simulation workloads better despite having fewer threads.

The Verdict

Pick the Intel Core i9-13900KF if your workload is heavily multi-threaded and involves large data sets, compression, or integer math. The data shows it is 14.1% faster in every Cinebench test, which means rendering and video encoding tasks will complete noticeably faster. Its 35.5% lead in data compression and 33.3% lead in integer math make it the obvious choice for file archiving, database work, and scientific computing that relies on integer operations. The i9-13900KF also has 32 threads versus 20, which explains its 14.4% higher PassMark multithread score. If you run heavily threaded applications all day, the i9-13900KF is the stronger performer.

Pick the Intel Core Ultra 7 265F if your work leans on floating-point math, prime-number calculations, or single-threaded responsiveness. Its 84.9% win in find prime numbers is a clear signal for certain cryptographic and mathematical workloads. The 15.2% lead in floating point math matters for scientific simulations and 3D rendering that uses FPU-heavy code. The 3.6% single-thread advantage, combined with a 65 W TDP versus 125 W, makes the Ultra 7 265F a more efficient choice for everyday desktop use and tasks that do not scale beyond a few cores. It also supports only DDR5 memory while the i9-13900KF supports both DDR4 and DDR5, so the Ultra 7 265F is the better fit for a modern DDR5-only build.

Head-to-Head Benchmarks

The largest margin in the entire comparison belongs to the Ultra 7 265F in PassMark find prime numbers, where it scores 416 against the i9-13900KF's 225, a 84.9% advantage. This is an extreme outlier and indicates the Ultra 7 265F's architecture handles this specific workload far more efficiently. The second-biggest win for the Ultra 7 265F is in floating point math, 173855 versus 150869, a 15.2% lead. In physics, the Ultra 7 265F wins 3172 to 2956, a 7.3% margin. Its single-thread wins are smaller but consistent: 4750 to 4584 in both single-thread tests, a 3.6% edge.

The i9-13900KF's largest victory is in data compression, scoring 786218 versus 507018, a 35.5% gap. Integer math is next, 206859 versus 138078, a 33.3% lead. Random string sorting goes to the i9-13900KF by 27.8% (86510 versus 62439). The Cinebench results are uniform: the i9-13900KF wins all six tests by exactly 14.1%, from R15 multicore (4924 versus 4231) to R23 singlecore (6897 versus 5926). The i9-13900KF also wins data encryption by 14.5% (46186 versus 39468), extended instructions by 14.9% (46084 versus 39235), and PassMark multithread by 14.4% (57729 versus 49410). These consistent 14-15% margins in the i9-13900KF's favor highlight its thread-count advantage.

FAQ

Q: Which CPU is better for single-threaded performance?

A: The Intel Core Ultra 7 265F wins in PassMark single-thread tests with a score of 4750 versus 4584 for the i9-13900KF, a 3.6% advantage. However, the i9-13900KF wins all Cinebench single-core tests by 14.1%, so the winner depends on the benchmark methodology.

Q: Is the i9-13900KF always faster in multi-core workloads?

A: Not always. The i9-13900KF wins Cinebench R23 multicore (48855 versus 41980) and PassMark multithread (57729 versus 49410), but the Ultra 7 265F wins PassMark floating point math (173855 versus 150869) and physics (3172 versus 2956), which are also multi-threaded tests.

Q: Why does the Ultra 7 265F have a huge win in find prime numbers?

A: The Ultra 7 265F scores 416 versus 225 for the i9-13900KF, an 84.9% advantage. This suggests its architecture handles prime-number generation algorithms much more efficiently, likely due to differences in instruction handling and core design.

Q: Which CPU supports DDR4 memory?

A: Only the Intel Core i9-13900KF supports both DDR4 and DDR5 memory. The Intel Core Ultra 7 265F supports only DDR5. The i9-13900KF also supports ECC memory, while the Ultra 7 265F does not.

Q: Are these CPUs in the same performance percentile?

A: Yes, both are in the 93rd percentile of all CPUs in the database. The Ultra 7 265F has an average benchmark score of 64438, while the i9-13900KF has an average of 61841, placing them in the same overall tier despite their different strengths.

Q: Does the i9-13900KF have more cores and threads?

A: Yes, the i9-13900KF has 24 cores and 32 threads, while the Ultra 7 265F has 20 cores and 20 threads. The i9-13900KF also has a higher base clock of 3.00 GHz versus 2.40 GHz and a higher boost clock of 5.80 GHz versus 5.30 GHz.

Architecture Differences

The two processors come from different architectural eras. The Intel Core Ultra 7 265F uses Arrow Lake-S, built on a 3 nm process by TSMC, while the Intel Core i9-13900KF uses Raptor Lake-S, built on a 10 nm process by Intel. The Ultra 7 265F has a die size of 243 mm² and contains 17,800 million transistors, while the i9-13900KF has a die size of 257 mm² and no recorded transistor count. The process node difference is significant, as the 3 nm process allows the Ultra 7 265F to achieve its 65 W TDP while the i9-13900KF requires 125 W.

Cache layouts differ notably. The Ultra 7 265F 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 and 2 MB of L2 per core, with a larger 36 MB of shared L3. This means the i9-13900KF has more total L3 cache (36 MB versus 30 MB), but the Ultra 7 265F has more cache per core. The Ultra 7 265F has no integrated graphics, while the i9-13900KF also has no recorded integrated graphics. Both use the same PCIe Gen 5 interface with 20 CPU lanes.

Memory support is another differentiator. The Ultra 7 265F supports only DDR5 with dual-channel memory and a bandwidth of 102.4 GB/s. The i9-13900KF supports both DDR4 and DDR5 with dual-channel memory, but its bandwidth is not recorded in the database. The i9-13900KF supports ECC memory, while the Ultra 7 265F does not. The Ultra 7 265F is not multiplier unlocked, while the i9-13900KF is unlocked, meaning the i9-13900KF allows overclocking.

Specification Differences

The core and thread counts are a primary difference: the Ultra 7 265F has 20 cores and 20 threads, while the i9-13900KF has 24 cores and 32 threads. Clock speeds favor the i9-13900KF, which has a base clock of 3.00 GHz and a boost clock of 5.80 GHz, compared to the Ultra 7 265F's 2.40 GHz base and 5.30 GHz boost. TDP is drastically different, with the Ultra 7 265F at 65 W and the i9-13900KF at 125 W.

The socket and platform differ: the Ultra 7 265F uses Intel Socket 1851, while the i9-13900KF uses Intel Socket 1700. Memory support is narrower on the Ultra 7 265F (DDR5 only) versus the i9-13900KF (DDR4 and DDR5). ECC memory is supported only on the i9-13900KF. The Ultra 7 265F has a recorded memory bandwidth of 102.4 GB/s, while the i9-13900KF has none recorded. The release dates are also different, with the Ultra 7 265F launching in January 2025 and the i9-13900KF in September 2022. The Ultra 7 265F has a launch MSRP of $379, while the i9-13900KF has a launch MSRP of $564. The multiplier is unlocked only on the i9-13900KF, and the part numbers are SRQCV for the Ultra 7 265F and SRMBJ for the i9-13900KF.