Core i5-10310U vs Core i7-3840QM

Both the Core i5-10310U and Core i7-3840QM share an identical 4-core/8-thread configuration. Boost clocks reach 4.4 GHz on the Core i5-10310U versus 3.8 GHz on the Core i7-3840QM — a 14.6% clock advantage for the Core i5-10310U (base: 1.7 GHz vs 2.8 GHz). The Core i5-10310U uses the Comet Lake-U (2019−2020) architecture (14 nm), while the Core i7-3840QM uses Ivy Bridge (2012−2013) (22 nm). In PassMark, the Core i5-10310U scores 5,864 against the Core i7-3840QM's 5,871 — a 0.1% lead for the Core i7-3840QM. Geekbench 6 single-core — the metric most relevant to gaming — records 1,284 vs 676, a 62% lead for the Core i5-10310U that directly translates to higher frame rates. L3 cache: 6 MB on the Core i5-10310U vs 8 MB (total) on the Core i7-3840QM.

The Core i5-10310U uses the FCBGA1528 socket (PCIe 3.0), while the Core i7-3840QM uses PGA988 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i5-10310U versus DDR3-1600 on the Core i7-3840QM — the Core i5-10310U supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-10310U supports up to 64 GB of RAM compared to 32 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes.

Neither processor supports overclocking. Both support VT-x, VT-d, EPT virtualization. Both include integrated graphics — UHD Graphics for 10th Gen (Core i5-10310U) and HD Graphics 4000 (Core i7-3840QM) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i5-10310U targets Business Laptop, Core i7-3840QM targets Mobile Workstation. Direct competitor: Core i5-10310U rivals Ryzen 5 PRO 4650U; Core i7-3840QM rivals A10-5750M.