Core i7-860S vs Core 2 Duo T6600

The Core i7-860S packs 4 cores / 8 threads, while the Core 2 Duo T6600 offers 2 cores / 2 threads — the Core i7-860S has 2 more cores. Boost clocks reach 3.46 GHz on the Core i7-860S versus 2.2 GHz on the Core 2 Duo T6600 — a 44.5% clock advantage for the Core i7-860S (base: 2.53 GHz vs 2.2 GHz). The Core i7-860S uses the Lynnfield (2009−2010) architecture (45 nm), while the Core 2 Duo T6600 uses Penryn (2008−2011) (45 nm). In PassMark, the Core i7-860S scores 2,324 against the Core 2 Duo T6600's 2,355 — a 1.3% lead for the Core 2 Duo T6600. Geekbench 6 single-core — the metric most relevant to gaming — records 451 vs 200, a 77.1% lead for the Core i7-860S that directly translates to higher frame rates. Multi-core Geekbench: 1,332 vs 350 (116.8% advantage for the Core i7-860S). L3 cache: 8 MB (total) on the Core i7-860S vs 2 MB L2 Cache on the Core 2 Duo T6600.

The Core i7-860S uses the LGA1156 socket (PCIe 2.0), while the Core 2 Duo T6600 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard. Both support up to DDR3-1333 memory speed. The Core i7-860S supports up to 16 GB of RAM compared to 8 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core i7-860S) vs 0 (Core 2 Duo T6600) — the Core i7-860S offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: P55,H55,H57,Q57 (Core i7-860S) and GM45,PM45 (Core 2 Duo T6600).

Virtualization support: Yes (Core i7-860S) vs VT-x (Core 2 Duo T6600). Primary use case: Core 2 Duo T6600 targets Legacy Laptop.

At current prices ($96 vs $4), the Core 2 Duo T6600 is $92 cheaper. In terms of value (PassMark points per dollar), the Core i7-860S delivers 24.2 pts/$ vs 588.8 pts/$ for the Core 2 Duo T6600 — making the Core 2 Duo T6600 the 184.2% better value option.