Core i7-640M vs Celeron 6305

The Core i7-640M packs 2 cores / 4 threads, matching the Celeron 6305's 2 cores. Boost clocks reach 3.46 GHz on the Core i7-640M versus 1.8 GHz on the Celeron 6305 — a 63.1% clock advantage for the Core i7-640M. The Core i7-640M uses the Arrandale (2010−2011) architecture (32 nm), while the Celeron 6305 uses Tiger Lake-U (2020−2021) (10 nm SuperFin). In PassMark, the Core i7-640M scores 2,092 against the Celeron 6305's 2,077 — a 0.7% lead for the Core i7-640M. L3 cache: 4 MB (total) on the Core i7-640M vs 4 MB on the Celeron 6305.

The Core i7-640M uses the PGA988 socket (PCIe 2.0), while the Celeron 6305 uses FCBGA1449 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 1066 on the Core i7-640M versus DDR4-3200 on the Celeron 6305 — the Core i7-640M supports 198.5% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron 6305 supports up to 64 GB of RAM compared to 8 — 155.6% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core i7-640M) vs 4 (Celeron 6305) — the Core i7-640M offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM55,HM57,QM57 (Core i7-640M) and Tiger Lake-U (Celeron 6305).

Neither processor supports overclocking. Virtualization support: true (Core i7-640M) vs VT-x, VT-d (Celeron 6305). Both include integrated graphics — Intel HD Graphics (Ironlake) (Core i7-640M) and UHD Graphics for 11th Gen (Celeron 6305) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron 6305 targets Budget. Direct competitor: Core i7-640M rivals Core 2 Duo T9600; Celeron 6305 rivals Pentium Gold 7505.