Core i5-2400S vs Core i5-6300U

The Core i5-2400S packs 4 cores / 4 threads, while the Core i5-6300U offers 2 cores / 4 threads — the Core i5-2400S has 2 more cores. Boost clocks reach 3.3 GHz on the Core i5-2400S versus 3 GHz on the Core i5-6300U — a 9.5% clock advantage for the Core i5-2400S (base: 2.5 GHz vs 2.4 GHz). The Core i5-2400S uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Core i5-6300U uses Skylake (2015−2016) (14 nm). In PassMark, the Core i5-2400S scores 3,187 against the Core i5-6300U's 3,207 — a 0.6% lead for the Core i5-6300U. Geekbench 6 single-core — the metric most relevant to gaming — records 578 vs 967, a 50.4% lead for the Core i5-6300U that directly translates to higher frame rates. L3 cache: 6144 kB (total) on the Core i5-2400S vs 3 MB on the Core i5-6300U.

The Core i5-2400S uses the LGA1155 socket (PCIe 2.0), while the Core i5-6300U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Core i5-2400S versus DDR4-2133 on the Core i5-6300U — the Core i5-6300U supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 32 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core i5-2400S) vs 12 (Core i5-6300U) — the Core i5-2400S offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H61,H67,P67,Z68,B75,Z77 (Core i5-2400S) and Skylake-U (Core i5-6300U).

Virtualization support: Yes (Core i5-2400S) vs VT-x, VT-d, EPT (Core i5-6300U). Both include integrated graphics — Intel HD Graphics 2000 (Core i5-2400S) and HD Graphics 520 (Core i5-6300U) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i5-6300U targets Mainstream Laptop. Direct competitor: Core i5-6300U rivals PRO A12-9800B.