Core i3-2120 vs Athlon II X4 605e

The Core i3-2120 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 3.3 GHz on the Core i3-2120 versus 2.3 GHz on the Athlon II X4 605e — a 35.7% clock advantage for the Core i3-2120 (base: 3.3 GHz vs 2.3 GHz). The Core i3-2120 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Athlon II X4 605e uses Propus (2009−2011) (45 nm). In PassMark, the Core i3-2120 scores 1,979 against the Athlon II X4 605e's 1,964 — a 0.8% lead for the Core i3-2120. Cinebench R23 multi-core: 1,073 vs 1,140 (6.1% advantage for the Athlon II X4 605e). Geekbench 6 single-core — the metric most relevant to gaming — records 534 vs 300, a 56.1% lead for the Core i3-2120 that directly translates to higher frame rates. Multi-core Geekbench: 1,140 vs 1,069 (6.4% advantage for the Core i3-2120). L3 cache: 3 MB (total) on the Core i3-2120 vs 0 kB on the Athlon II X4 605e.

The Core i3-2120 uses the LGA1155 socket (PCIe 2.0), while the Athlon II X4 605e uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard. Both support up to DDR3-1333 memory speed. Both support up to 32 GB of RAM. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: H61,H67,P67,Z68,Q65,Q67,B75,H77,Q75,Q77,Z75,Z77 (Core i3-2120) and 760G,785G,790GX,880G,890GX (Athlon II X4 605e).

Virtualization support: Yes (Core i3-2120) vs AMD-V (Athlon II X4 605e). The Core i3-2120 includes integrated graphics (Intel HD Graphics 2000), while the Athlon II X4 605e requires a dedicated GPU. Primary use case: Athlon II X4 605e targets Desktop.

The Core i3-2120 launched at $138 MSRP, while the Athlon II X4 605e debuted at $143. At current prices ($25 vs $25), the Athlon II X4 605e is $0 cheaper. In terms of value (PassMark points per dollar), the Core i3-2120 delivers 79.2 pts/$ vs 78.6 pts/$ for the Athlon II X4 605e — making the Core i3-2120 the 0.8% better value option.