Core i5-12400F vs Core i7-8700B

Both the Core i5-12400F and Core i7-8700B share an identical 6-core/12-thread configuration. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 4.6 GHz on the Core i7-8700B — a 4.4% clock advantage for the Core i7-8700B (base: 2.5 GHz vs 3.2 GHz). The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Core i7-8700B uses Coffee Lake (2017−2019) (14 nm). In PassMark, the Core i5-12400F scores 19,532 against the Core i7-8700B's 11,795 — a 49.4% lead for the Core i5-12400F. L3 cache: 18 MB (total) on the Core i5-12400F vs 12 MB (total) on the Core i7-8700B.

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Core i7-8700B uses BGA1440 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i5-12400F versus DDR4-2666 on the Core i7-8700B — the Core i5-12400F supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-12400F 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: 20 (Core i5-12400F) vs 16 (Core i7-8700B) — the Core i5-12400F offers 4 more lanes for additional GPUs or NVMe drives.

Virtualization support: VT-x, VT-d, EPT (Core i5-12400F) vs VT-x, VT-d (Core i7-8700B). The Core i7-8700B includes integrated graphics (UHD Graphics 630), while the Core i5-12400F requires a dedicated GPU. Primary use case: Core i5-12400F targets Gaming Performance/Value, Core i7-8700B targets Mobile. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.

The Core i5-12400F launched at $174 MSRP, while the Core i7-8700B debuted at $303. At current prices ($110 vs $139), the Core i5-12400F is $29 cheaper. In terms of value (PassMark points per dollar), the Core i5-12400F delivers 177.6 pts/$ vs 84.9 pts/$ for the Core i7-8700B — making the Core i5-12400F the 70.7% better value option.