Core i7-12700K vs Core i5-3550S

The Core i7-12700K packs 12 cores / 20 threads, while the Core i5-3550S offers 4 cores / 4 threads — the Core i7-12700K has 8 more cores. Boost clocks reach 5 GHz on the Core i7-12700K versus 3.7 GHz on the Core i5-3550S — a 29.9% clock advantage for the Core i7-12700K (base: 3.6 GHz vs 3 GHz). The Core i7-12700K uses the Alder Lake, Golden Cove, Gracemont (2021) architecture (10 nm), while the Core i5-3550S uses Ivy Bridge (2012−2013) (22 nm). In PassMark, the Core i7-12700K scores 34,347 against the Core i5-3550S's 4,442 — a 154.2% lead for the Core i7-12700K. L3 cache: 25 MB (total) on the Core i7-12700K vs 6144 kB (total) on the Core i5-3550S.

The Core i7-12700K uses the LGA1700 socket (PCIe 5.0), while the Core i5-3550S uses LGA1155 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 4800 on the Core i7-12700K versus DDR3-1600 on the Core i5-3550S — the Core i7-12700K supports 199.8% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i7-12700K supports up to 128 of RAM compared to 32 GB — 120% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 20 (Core i7-12700K) vs 16 (Core i5-3550S) — the Core i7-12700K offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Z690,B660 (Core i7-12700K) and H61,H67,P67,Z68,B75,Z77 (Core i5-3550S).

Only the Core i7-12700K has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: VT-x, VT-d (Core i7-12700K) vs VT-x, VT-d, EPT (Core i5-3550S). Both include integrated graphics — Intel UHD Graphics 770 (Core i7-12700K) and HD Graphics 2500 (Core i5-3550S) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i5-3550S targets Legacy Desktop. Direct competitor: Core i7-12700K rivals Ryzen 7 5800X; Core i5-3550S rivals FX-6350.

The Core i7-12700K launched at $409 MSRP, while the Core i5-3550S debuted at $205. At current prices ($285 vs $100), the Core i5-3550S is $185 cheaper. In terms of value (PassMark points per dollar), the Core i7-12700K delivers 120.5 pts/$ vs 44.4 pts/$ for the Core i5-3550S — making the Core i7-12700K the 92.3% better value option.