Core i3-4120U vs Athlon II X4 605e

The Core i3-4120U packs 2 cores / 4 threads, while the Athlon II X4 605e offers 4 cores / 4 threads — the Athlon II X4 605e has 2 more cores. Boost clocks reach 2 GHz on the Core i3-4120U versus 2.3 GHz on the Athlon II X4 605e — a 14% clock advantage for the Athlon II X4 605e (base: 2 GHz vs 2.3 GHz). The Core i3-4120U uses the Haswell (2013−2015) architecture (22 nm), while the Athlon II X4 605e uses Propus (2009−2011) (45 nm). In PassMark, the Core i3-4120U scores 1,948 against the Athlon II X4 605e's 1,964 — a 0.8% lead for the Athlon II X4 605e. Geekbench 6 single-core — the metric most relevant to gaming — records 462 vs 300, a 42.5% lead for the Core i3-4120U that directly translates to higher frame rates. Multi-core Geekbench: 1,071 vs 1,069 (0.2% advantage for the Core i3-4120U). L3 cache: 3 MB on the Core i3-4120U vs 0 kB on the Athlon II X4 605e.

The Core i3-4120U uses the FCBGA1168 socket (PCIe 3.0), while the Athlon II X4 605e uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard. Both support up to DDR3L-1600 memory speed. The Athlon II X4 605e supports up to 32 GB of RAM compared to 16 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 12 (Core i3-4120U) vs 16 (Athlon II X4 605e) — the Athlon II X4 605e offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM86,HM87 (Core i3-4120U) and 760G,785G,790GX,880G,890GX (Athlon II X4 605e).

Virtualization support: Yes (Core i3-4120U) vs AMD-V (Athlon II X4 605e). The Core i3-4120U includes integrated graphics (Intel HD Graphics 4400), while the Athlon II X4 605e requires a dedicated GPU. Primary use case: Athlon II X4 605e targets Desktop.