Core i5-12450H vs Core i9-9900

The Core i5-12450H packs 8 cores / 12 threads, matching the Core i9-9900's 8 cores. Boost clocks reach 4.4 GHz on the Core i5-12450H versus 5 GHz on the Core i9-9900 — a 12.8% clock advantage for the Core i9-9900 (base: 2 GHz vs 3.1 GHz). The Core i5-12450H uses the Alder Lake-H (2022) architecture (Intel 7 nm), while the Core i9-9900 uses Coffee Lake-R (2018−2019) (14 nm). In PassMark, the Core i5-12450H scores 16,133 against the Core i9-9900's 16,238 — a 0.6% lead for the Core i9-9900. Geekbench 6 single-core — the metric most relevant to gaming — records 2,100 vs 1,637, a 24.8% lead for the Core i5-12450H that directly translates to higher frame rates. L3 cache: 12 MB (total) on the Core i5-12450H vs 16 MB (total) on the Core i9-9900.

The Core i5-12450H uses the FCBGA1744 socket (PCIe 5.0), while the Core i9-9900 uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches LPDDR5-5200 on the Core i5-12450H versus DDR4-2666 on the Core i9-9900 — the Core i5-12450H supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i9-9900 supports up to 128 GB of RAM compared to 64 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 28 (Core i5-12450H) vs 16 (Core i9-9900) — the Core i5-12450H offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM670,WM690 (Core i5-12450H) and Z390,B365 (Core i9-9900).

Neither processor supports overclocking. Virtualization support: VT-x, VT-d, EPT (Core i5-12450H) vs VT-x, VT-d (Core i9-9900). Both include integrated graphics — UHD Graphics for 12th Gen (Core i5-12450H) and UHD Graphics 630 (Core i9-9900) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i5-12450H targets Performance Laptop. Direct competitor: Core i5-12450H rivals Ryzen 5 6600H.