Core i9-12900KS vs Core i7-12700K

The Core i9-12900KS packs 16 cores / 24 threads, while the Core i7-12700K offers 12 cores / 20 threads — the Core i9-12900KS has 4 more cores. Boost clocks reach 5.3 GHz on the Core i9-12900KS versus 5 GHz on the Core i7-12700K — a 5.8% clock advantage for the Core i9-12900KS (base: 3.4 GHz vs 3.6 GHz). The Core i9-12900KS uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Core i7-12700K uses Alder Lake, Golden Cove, Gracemont (2021) (10 nm). In PassMark, the Core i9-12900KS scores 43,528 against the Core i7-12700K's 34,347 — a 23.6% lead for the Core i9-12900KS. L3 cache: 30 MB (total) on the Core i9-12900KS vs 25 MB (total) on the Core i7-12700K.

Both processors use the LGA1700 socket with PCIe 5.0. Maximum memory speed reaches DDR5-4800 on the Core i9-12900KS versus 4800 on the Core i7-12700K — the Core i7-12700K supports 199.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. Both provide 20 PCIe lanes. Chipset compatibility: LGA1700 (Core i9-12900KS) and Z690,B660 (Core i7-12700K).

Both processors feature an unlocked multiplier for overclocking. Only the Core i9-12900KS supports AVX-512 instructions — important for machine learning and scientific applications. Both support VT-x, VT-d virtualization. Both include integrated graphics — UHD 770 (Core i9-12900KS) and Intel UHD Graphics 770 (Core i7-12700K) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Direct competitor: Core i7-12700K rivals Ryzen 7 5800X.

The Core i9-12900KS launched at $739 MSRP, while the Core i7-12700K debuted at $409. At current prices ($385 vs $285), the Core i7-12700K is $100 cheaper. In terms of value (PassMark points per dollar), the Core i9-12900KS delivers 113.1 pts/$ vs 120.5 pts/$ for the Core i7-12700K — making the Core i7-12700K the 6.4% better value option.