Xeon E-2478 vs Core i9-10940X

The Xeon E-2478 packs 8 cores / 16 threads, while the Core i9-10940X offers 14 cores / 28 threads — the Core i9-10940X has 6 more cores. Boost clocks reach 5.2 GHz on the Xeon E-2478 versus 4.8 GHz on the Core i9-10940X — a 8% clock advantage for the Xeon E-2478 (base: 2.8 GHz vs 3.3 GHz). The Xeon E-2478 uses the Raptor Lake-S (2023−2024) architecture (Intel 7 nm), while the Core i9-10940X uses Cascade Lake-X (2019) (14 nm). In PassMark, the Xeon E-2478 scores 27,776 against the Core i9-10940X's 27,684 — a 0.3% lead for the Xeon E-2478. L3 cache: 24 MB (total) on the Xeon E-2478 vs 19.25 MB (total) on the Core i9-10940X.

The Xeon E-2478 uses the LGA1700 socket (PCIe 5.0), while the Core i9-10940X uses LGA2066 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800 on the Xeon E-2478 versus DDR4-2933 on the Core i9-10940X — the Xeon E-2478 supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i9-10940X supports up to 256 GB of RAM compared to 128 GB — 66.7% more capacity for professional workloads. Memory channels: 2 (Xeon E-2478) vs 4 (Core i9-10940X). PCIe lanes: 20 (Xeon E-2478) vs 48 (Core i9-10940X) — the Core i9-10940X offers 28 more lanes for additional GPUs or NVMe drives.

Only the Core i9-10940X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Core i9-10940X supports AVX-512 instructions — important for machine learning and scientific applications. Both support VT-x, VT-d virtualization. Primary use case: Xeon E-2478 targets Server, Core i9-10940X targets High-End Desktop.

The Xeon E-2478 launched at $568 MSRP, while the Core i9-10940X debuted at $784. At current prices ($269 vs $460), the Xeon E-2478 is $191 cheaper. In terms of value (PassMark points per dollar), the Xeon E-2478 delivers 103.3 pts/$ vs 60.2 pts/$ for the Core i9-10940X — making the Xeon E-2478 the 52.7% better value option.