Athlon II X2 255 vs Core i3-380M

The Athlon II X2 255 packs 2 cores / 2 threads, matching the Core i3-380M's 2 cores. Boost clocks reach 3.1 GHz on the Athlon II X2 255 versus 0.53 GHz on the Core i3-380M — a 141.6% clock advantage for the Athlon II X2 255 (base: 3.1 GHz vs 2.53 GHz). The Athlon II X2 255 uses the Regor (2009−2013) architecture (45 nm), while the Core i3-380M uses Arrandale (2010−2011) (32 nm). In PassMark, the Athlon II X2 255 scores 1,210 against the Core i3-380M's 1,212 — a 0.2% lead for the Core i3-380M. Geekbench 6 single-core — the metric most relevant to gaming — records 265 vs 450, a 51.7% lead for the Core i3-380M that directly translates to higher frame rates. Multi-core Geekbench: 500 vs 1,100 (75% advantage for the Core i3-380M). L3 cache: 0 kB on the Athlon II X2 255 vs 3 MB (total) on the Core i3-380M.

The Athlon II X2 255 uses the AM3 socket (PCIe 2.0), while the Core i3-380M uses PGA988 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Athlon II X2 255 versus DDR3-1066 on the Core i3-380M — the Athlon II X2 255 supports 25% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Athlon II X2 255 supports up to 16 GB of RAM compared to 8 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Athlon II X2 255) vs 16 (Core i3-380M) — the Core i3-380M offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: 760G,780G,785G,790GX,870,880G,890GX,890FX (Athlon II X2 255) and HM55,HM57,QM57 (Core i3-380M).

Neither processor supports overclocking. Virtualization support: AMD-V (Athlon II X2 255) vs VT-x (Core i3-380M). The Core i3-380M includes integrated graphics (Intel HD Graphics (Gen 1)), while the Athlon II X2 255 requires a dedicated GPU. Primary use case: Athlon II X2 255 targets Legacy Desktop, Core i3-380M targets Legacy Laptop. Direct competitor: Athlon II X2 255 rivals Pentium E5700; Core i3-380M rivals AMD Athlon II P320.

At launch, the Athlon II X2 255 was priced at $60, while the Core i3-380M came in at $49. On launch pricing ($60 vs $49), Core i3-380M was $11 cheaper. In terms of value on MSRP (PassMark points per dollar), the Athlon II X2 255 delivers 20.2 pts/$ vs 24.7 pts/$ for the Core i3-380M — making the Core i3-380M the 20.3% better value option.

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