Core i5-5257U vs Celeron J4105

The Core i5-5257U packs 2 cores / 4 threads, while the Celeron J4105 offers 4 cores / 4 threads — the Celeron J4105 has 2 more cores. Boost clocks reach 3.1 GHz on the Core i5-5257U versus 2.5 GHz on the Celeron J4105 — a 21.4% clock advantage for the Core i5-5257U (base: 2.7 GHz vs 1.5 GHz). The Core i5-5257U uses the Broadwell-U (2015) architecture (14 nm), while the Celeron J4105 uses Goldmont Plus (2017) (14 nm). In PassMark, the Core i5-5257U scores 2,837 against the Celeron J4105's 2,820 — a 0.6% lead for the Core i5-5257U. L3 cache: 3 MB (total) on the Core i5-5257U vs 4 MB on the Celeron J4105.

The Core i5-5257U uses the FCBGA1168 socket (PCIe 3.0), while the Celeron J4105 uses FCBGA1090 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches LPDDR3 1866 MHz on the Core i5-5257U versus 2400 on the Celeron J4105 — the Core i5-5257U supports 172% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-5257U supports up to 16 GB of RAM compared to 8 — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 12 (Core i5-5257U) vs 6 (Celeron J4105) — the Core i5-5257U offers 6 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Broadwell-U (Core i5-5257U) and BGA1090 (Celeron J4105).

Neither processor supports overclocking. Both support true virtualization. Both include integrated graphics — Intel Iris Graphics 6100 (Core i5-5257U) and Intel UHD Graphics 600 (Celeron J4105) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i5-5257U targets Mobile. Direct competitor: Celeron J4105 rivals Ryzen Embedded R1305G.