Core i5-12450HX vs Core i9-9900KF

The Core i5-12450HX packs 8 cores / 12 threads, matching the Core i9-9900KF's 8 cores. Boost clocks reach 4.4 GHz on the Core i5-12450HX versus 5 GHz on the Core i9-9900KF — a 12.8% clock advantage for the Core i9-9900KF (base: 2.4 GHz vs 3.6 GHz). The Core i5-12450HX uses the Alder Lake-HX (2022) architecture (Intel 7 nm), while the Core i9-9900KF uses Coffee Lake-R (2018−2019) (14 nm). In PassMark, the Core i5-12450HX scores 18,064 against the Core i9-9900KF's 18,029 — a 0.2% lead for the Core i5-12450HX. Geekbench 6 single-core — the metric most relevant to gaming — records 2,150 vs 1,720, a 22.2% lead for the Core i5-12450HX that directly translates to higher frame rates. L3 cache: 12 MB (total) on the Core i5-12450HX vs 16 MB (total) on the Core i9-9900KF.

The Core i5-12450HX uses the FCBGA1964 socket (PCIe 3.0), while the Core i9-9900KF uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800 on the Core i5-12450HX versus DDR4-2666 on the Core i9-9900KF — the Core i5-12450HX supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 48 (Core i5-12450HX) vs 16 (Core i9-9900KF) — the Core i5-12450HX offers 32 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM670,WM690 (Core i5-12450HX) and Z390,Z370,H370,B365,B360 (Core i9-9900KF).

Both processors feature an unlocked multiplier for overclocking. Virtualization support: VT-x, VT-d, EPT (Core i5-12450HX) vs VT-x, VT-d (Core i9-9900KF). The Core i5-12450HX includes integrated graphics (UHD Graphics for 12th Gen), while the Core i9-9900KF requires a dedicated GPU. Primary use case: Core i5-12450HX targets Workstation/Enthusiast Laptop, Core i9-9900KF targets Gaming. Direct competitor: Core i5-12450HX rivals Ryzen 5 7645HX.