Core 2 Duo E8400 vs Celeron J1900

The Core 2 Duo E8400 packs 2 cores / 2 threads, while the Celeron J1900 offers 4 cores / 4 threads — the Celeron J1900 has 2 more cores. Boost clocks reach 3 GHz on the Core 2 Duo E8400 versus 2.42 GHz on the Celeron J1900 — a 21.4% clock advantage for the Core 2 Duo E8400 (base: 3 GHz vs 2 GHz). The Core 2 Duo E8400 uses the Wolfdale (2008−2010) architecture (45 nm), while the Celeron J1900 uses Bay Trail-D (2013) (22 nm). In PassMark, the Core 2 Duo E8400 scores 1,165 against the Celeron J1900's 1,152 — a 1.1% lead for the Core 2 Duo E8400. L3 cache: 0 kB on the Core 2 Duo E8400 vs 2 MB L2 Cache on the Celeron J1900.

The Core 2 Duo E8400 uses the LGA775 socket (PCIe 1.1), while the Celeron J1900 uses FCBGA1170 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 1333 on the Core 2 Duo E8400 versus DDR3L-1333 on the Celeron J1900 — the Core 2 Duo E8400 supports 199.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core 2 Duo E8400 supports up to 16 of RAM compared to 8 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core 2 Duo E8400) vs 4 (Celeron J1900) — the Core 2 Duo E8400 offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: P35,G31,G33,P45 (Core 2 Duo E8400) and Bay Trail SoC (Celeron J1900).

Virtualization: true (Core 2 Duo E8400) / not specified (Celeron J1900). The Celeron J1900 includes integrated graphics (Intel HD Graphics), while the Core 2 Duo E8400 requires a dedicated GPU. Direct competitor: Core 2 Duo E8400 rivals Phenom II X2 550.