Core Ultra 7 265KF vs Core i5-10400F

The Core Ultra 7 265KF packs 20 cores / 20 threads, while the Core i5-10400F offers 6 cores / 12 threads — the Core Ultra 7 265KF has 14 more cores. Boost clocks reach 5.5 GHz on the Core Ultra 7 265KF versus 4.3 GHz on the Core i5-10400F — a 24.5% clock advantage for the Core Ultra 7 265KF (base: 3.9 GHz vs 2.9 GHz). The Core Ultra 7 265KF uses the Arrow Lake-S (2024−2025) architecture (3 nm), while the Core i5-10400F uses Comet Lake (2020−2025) (14 nm). In PassMark, the Core Ultra 7 265KF scores 58,690 against the Core i5-10400F's 13,029 — a 127.3% lead for the Core Ultra 7 265KF. Cinebench R23 multi-core: 35,315 vs 8,191 (124.7% advantage for the Core Ultra 7 265KF). Geekbench 6 single-core — the metric most relevant to gaming — records 3,055 vs 1,454, a 71% lead for the Core Ultra 7 265KF that directly translates to higher frame rates. Multi-core Geekbench: 20,373 vs 5,783 (111.6% advantage for the Core Ultra 7 265KF). L3 cache: 30 MB (total) on the Core Ultra 7 265KF vs 12 MB (total) on the Core i5-10400F.

The Core Ultra 7 265KF uses the LGA1851 socket (PCIe 5.0), while the Core i5-10400F uses LGA1200 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-6400 on the Core Ultra 7 265KF versus DDR4-2666 on the Core i5-10400F — the Core Ultra 7 265KF supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core Ultra 7 265KF supports up to 192 GB of RAM compared to 128 GB — 40% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 24 (Core Ultra 7 265KF) vs 16 (Core i5-10400F) — the Core Ultra 7 265KF offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel Z890 (Core Ultra 7 265KF) and H410,B460,H470,Z490,H510,B560,H570,Z590 (Core i5-10400F).

Only the Core Ultra 7 265KF has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: true (Core Ultra 7 265KF) vs VT-x, VT-d (Core i5-10400F). Primary use case: Core i5-10400F targets Gaming. Direct competitor: Core Ultra 7 265KF rivals Ryzen 7 9700X; Core i5-10400F rivals Ryzen 5 3600.

The Core Ultra 7 265KF launched at $379 MSRP, while the Core i5-10400F debuted at $160. At current prices ($323 vs $102), the Core i5-10400F is $221 cheaper. In terms of value (PassMark points per dollar), the Core Ultra 7 265KF delivers 181.7 pts/$ vs 127.7 pts/$ for the Core i5-10400F — making the Core Ultra 7 265KF the 34.9% better value option.