Core i5-2400 vs Athlon 300U

The Core i5-2400 packs 4 cores / 4 threads, while the Athlon 300U offers 2 cores / 4 threads — the Core i5-2400 has 2 more cores. Boost clocks reach 3.4 GHz on the Core i5-2400 versus 3.3 GHz on the Athlon 300U — a 3% clock advantage for the Core i5-2400 (base: 3.1 GHz vs 2.4 GHz). The Core i5-2400 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Athlon 300U uses Raven Ridge 2 (2019) (14 nm). In PassMark, the Core i5-2400 scores 3,870 against the Athlon 300U's 3,861 — a 0.2% lead for the Core i5-2400. Geekbench 6 single-core — the metric most relevant to gaming — records 595 vs 900, a 40.8% lead for the Athlon 300U that directly translates to higher frame rates. L3 cache: 6144 kB (total) on the Core i5-2400 vs 4 MB (total) on the Athlon 300U.

The Core i5-2400 uses the LGA1155 socket (PCIe 2.0), while the Athlon 300U uses FP5 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Core i5-2400 versus DDR4-2400 on the Athlon 300U — the Athlon 300U 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 i5-2400) vs 12 (Athlon 300U) — the Core i5-2400 offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H61,H67,P67,Z68,B75,Z77 (Core i5-2400) and FP5 (Athlon 300U).

Neither processor supports overclocking. Virtualization support: VT-x, VT-d, EPT (Core i5-2400) vs AMD-V (Athlon 300U). Both include integrated graphics — HD Graphics 2000 (Core i5-2400) and Radeon RX Vega 3 (Athlon 300U) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i5-2400 targets Legacy Desktop, Athlon 300U targets Budget Laptop. Direct competitor: Core i5-2400 rivals Phenom II X4 975.