Core i7-640UM vs Celeron N3150

The Core i7-640UM packs 2 cores / 4 threads, while the Celeron N3150 offers 4 cores / 4 threads — the Celeron N3150 has 2 more cores. Boost clocks reach 2.27 GHz on the Core i7-640UM versus 2.08 GHz on the Celeron N3150 — a 8.7% clock advantage for the Core i7-640UM (base: 1.2 GHz vs 1.6 GHz). The Core i7-640UM uses the Arrandale (2010−2011) architecture (32 nm), while the Celeron N3150 uses Braswell (2015−2016) (14 nm). In PassMark, the Core i7-640UM scores 1,168 against the Celeron N3150's 1,177 — a 0.8% lead for the Celeron N3150. L3 cache: 4 MB (total) on the Core i7-640UM vs 0 kB on the Celeron N3150.

The Core i7-640UM uses the BGA1288 socket (PCIe 2.0), while the Celeron N3150 uses FCBGA1170 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1066 on the Core i7-640UM versus 1600 on the Celeron N3150 — the Celeron N3150 supports 199.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 8 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core i7-640UM) vs 4 (Celeron N3150) — the Core i7-640UM offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM55,QM57 (Core i7-640UM) and FCBGA1170 (Celeron N3150).

Neither processor supports overclocking. Virtualization support: VT-x, VT-d (Core i7-640UM) vs true (Celeron N3150). Both include integrated graphics — Intel HD Graphics (Ironlake) (Core i7-640UM) and Intel HD Graphics (Braswell) (Celeron N3150) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i7-640UM targets Legacy Laptop. Direct competitor: Core i7-640UM rivals Core 2 Duo SU9600; Celeron N3150 rivals AMD E2-7110.