Core i5-580M vs Core i7-9700K

The Core i5-580M packs 2 cores / 4 threads, while the Core i7-9700K offers 8 cores / 8 threads — the Core i7-9700K has 6 more cores. Boost clocks reach 3.33 GHz on the Core i5-580M versus 4.9 GHz on the Core i7-9700K — a 38.2% clock advantage for the Core i7-9700K (base: 2.66 GHz vs 3.6 GHz). The Core i5-580M uses the Arrandale (2010−2011) architecture (32 nm), while the Core i7-9700K uses Coffee Lake-R (2018−2019) (14 nm). In PassMark, the Core i5-580M scores 1,983 against the Core i7-9700K's 14,397 — a 151.6% lead for the Core i7-9700K. L3 cache: 3 MB (total) on the Core i5-580M vs 12 MB (total) on the Core i7-9700K.

The Core i5-580M uses the PGA988 socket (PCIe 2.0), while the Core i7-9700K uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1066 on the Core i5-580M versus DDR4-2666 on the Core i7-9700K — the Core i7-9700K supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i7-9700K supports up to 128 GB of RAM compared to 8 GB — 176.5% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: HM55,PM55,HM57,QM57 (Core i5-580M) and Intel 300 series (Core i7-9700K).

Only the Core i7-9700K has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: VT-x, VT-d, EPT (Core i5-580M) vs VT-x, VT-d (Core i7-9700K). Both include integrated graphics — HD Graphics (Core i5-580M) and UHD Graphics 630 (Core i7-9700K) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i5-580M targets Legacy Laptop, Core i7-9700K targets Desktop. Direct competitor: Core i5-580M rivals Phenom II X2 N660.