Celeron 6305 vs Core i7-640M

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

The Celeron 6305 uses the FCBGA1449 socket (PCIe 4.0), while the Core i7-640M uses PGA988 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Celeron 6305 versus 1066 on the Core i7-640M — 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: 4 (Celeron 6305) vs 16 (Core i7-640M) — the Core i7-640M offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Tiger Lake-U (Celeron 6305) and HM55,HM57,QM57 (Core i7-640M).

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