Core i5-12400F vs Core 2 Duo T6670

The Core i5-12400F packs 6 cores / 12 threads, while the Core 2 Duo T6670 offers 2 cores / 2 threads — the Core i5-12400F has 4 more cores. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 2.2 GHz on the Core 2 Duo T6670 — a 66.7% clock advantage for the Core i5-12400F (base: 2.5 GHz vs 2.2 GHz). The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Core 2 Duo T6670 uses Penryn (2008−2011) (45 nm). In PassMark, the Core i5-12400F scores 19,532 against the Core 2 Duo T6670's 2,365 — a 156.8% lead for the Core i5-12400F. Geekbench 6 single-core — the metric most relevant to gaming — records 1,700 vs 252, a 148.4% lead for the Core i5-12400F that directly translates to higher frame rates. Multi-core Geekbench: 657 vs 252 (89.1% advantage for the Core i5-12400F). L3 cache: 18 MB (total) on the Core i5-12400F vs 2 MB L2 Cache on the Core 2 Duo T6670.

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Core 2 Duo T6670 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i5-12400F versus DDR3-1066 on the Core 2 Duo T6670 — the Core i5-12400F supports 50% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-12400F supports up to 128 GB of RAM compared to 8 GB — 176.5% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 20 (Core i5-12400F) vs 0 (Core 2 Duo T6670) — the Core i5-12400F offers 20 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400F) and GM45,PM45 (Core 2 Duo T6670).

Virtualization support: VT-x, VT-d, EPT (Core i5-12400F) vs VT-x (Core 2 Duo T6670). Primary use case: Core i5-12400F targets Gaming Performance/Value, Core 2 Duo T6670 targets Budget. Direct competitor: Core i5-12400F rivals Ryzen 5 5600; Core 2 Duo T6670 rivals Core 2 Duo T6600.