Core i7-840QM vs Celeron G3930T

The Core i7-840QM packs 4 cores / 8 threads, while the Celeron G3930T offers 2 cores / 2 threads — the Core i7-840QM has 2 more cores. Boost clocks reach 3.2 GHz on the Core i7-840QM versus 2.7 GHz on the Celeron G3930T — a 16.9% clock advantage for the Core i7-840QM (base: 1.86 GHz vs 2.7 GHz). The Core i7-840QM uses the Clarksfield (2009−2010) architecture (45 nm), while the Celeron G3930T uses Kaby Lake (2016−2019) (14 nm). In PassMark, the Core i7-840QM scores 2,025 against the Celeron G3930T's 2,023 — a 0.1% lead for the Core i7-840QM. Geekbench 6 single-core — the metric most relevant to gaming — records 390 vs 704, a 57.4% lead for the Celeron G3930T that directly translates to higher frame rates. Multi-core Geekbench: 1,050 vs 1,350 (25% advantage for the Celeron G3930T). L3 cache: 8 MB (total) on the Core i7-840QM vs 2 MB (total) on the Celeron G3930T.

The Core i7-840QM uses the PGA988 socket (PCIe 2.0), while the Celeron G3930T uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Core i7-840QM versus DDR4-2400 on the Celeron G3930T — the Celeron G3930T supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron G3930T supports up to 64 GB of RAM compared to 8 GB — 155.6% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: PM55,HM55,QM57,HM57 (Core i7-840QM) and H110,B250,H270,Z270 (Celeron G3930T).

Neither processor supports overclocking. Both support VT-x, VT-d virtualization. The Celeron G3930T includes integrated graphics (Intel HD Graphics 610), while the Core i7-840QM requires a dedicated GPU. Primary use case: Core i7-840QM targets Laptop, Celeron G3930T targets Desktop. Direct competitor: Celeron G3930T rivals Pentium G4560T.