Core i9-12900HX vs Ryzen 7 8745HX

The Core i9-12900HX packs 16 cores / 24 threads, while the Ryzen 7 8745HX offers 8 cores / 16 threads — the Core i9-12900HX has 8 more cores. Boost clocks reach 5 GHz on the Core i9-12900HX versus 5.1 GHz on the Ryzen 7 8745HX — a 2% clock advantage for the Ryzen 7 8745HX (base: 2.3 GHz vs 3.6 GHz). The Core i9-12900HX uses the Alder Lake-HX (2022) architecture (Intel 7 nm), while the Ryzen 7 8745HX uses Dragon Range (2025) (5 nm). In PassMark, the Core i9-12900HX scores 33,018 against the Ryzen 7 8745HX's 32,620 — a 1.2% lead for the Core i9-12900HX. Cinebench R23 multi-core: 23,150 vs 18,000 (25% advantage for the Core i9-12900HX). Geekbench 6 single-core — the metric most relevant to gaming — records 2,426 vs 2,700, a 10.7% lead for the Ryzen 7 8745HX that directly translates to higher frame rates. Multi-core Geekbench: 14,620 vs 13,500 (8% advantage for the Core i9-12900HX). L3 cache: 30 MB (total) on the Core i9-12900HX vs 32 MB (total) on the Ryzen 7 8745HX.

The Core i9-12900HX uses the FCBGA1964 socket (PCIe 5.0), while the Ryzen 7 8745HX uses FL1 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i9-12900HX versus DDR5-5200 on the Ryzen 7 8745HX — the Ryzen 7 8745HX supports 8.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i9-12900HX supports up to 128 GB of RAM compared to 64 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 48 (Core i9-12900HX) vs 28 (Ryzen 7 8745HX) — the Core i9-12900HX offers 20 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM670,WM690 (Core i9-12900HX) and FL1 (Ryzen 7 8745HX).

Both processors feature an unlocked multiplier for overclocking. Only the Ryzen 7 8745HX supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: VT-x, VT-d, EPT (Core i9-12900HX) vs AMD-V (Ryzen 7 8745HX). Both include integrated graphics — UHD Graphics 770 (Core i9-12900HX) and Radeon 610M (Ryzen 7 8745HX) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i9-12900HX targets High-end Mobile Performance, Ryzen 7 8745HX targets High-end Gaming Laptop. Direct competitor: Core i9-12900HX rivals Ryzen 9 6900HX; Ryzen 7 8745HX rivals Core i7-14700HX.