EPYC 4545P vs Core Ultra 9 275HX

The EPYC 4545P packs 16 cores / 32 threads, while the Core Ultra 9 275HX offers 24 cores / 24 threads — the Core Ultra 9 275HX has 8 more cores. Boost clocks reach 5.4 GHz on the EPYC 4545P versus 5.4 GHz on the Core Ultra 9 275HX — identical boost frequencies (base: 3 GHz vs 2.7 GHz). The EPYC 4545P uses the Grado (2025) architecture (4 nm), while the Core Ultra 9 275HX uses Arrow Lake-HX (2025) (3 nm). In PassMark, the EPYC 4545P scores 54,255 against the Core Ultra 9 275HX's 56,018 — a 3.2% lead for the Core Ultra 9 275HX. L3 cache: 64 MB (total) on the EPYC 4545P vs 36 MB (total) on the Core Ultra 9 275HX.

The EPYC 4545P uses the AM5 socket (PCIe 4.0), while the Core Ultra 9 275HX uses FCBGA2114 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 5600 on the EPYC 4545P versus DDR5-6400 on the Core Ultra 9 275HX — the EPYC 4545P supports 199.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core Ultra 9 275HX supports up to 256 GB of RAM compared to 192 — 28.6% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 28 (EPYC 4545P) vs 24 (Core Ultra 9 275HX) — the EPYC 4545P offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AM5 (EPYC 4545P) and HM870,WM880 (Core Ultra 9 275HX).

Both processors feature an unlocked multiplier for overclocking. Only the EPYC 4545P supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: VT-x, VT-d, AMD-V (EPYC 4545P) vs VT-x, VT-d (Core Ultra 9 275HX). Both include integrated graphics — AMD Radeon Graphics (EPYC 4545P) and Intel Arc Graphics (Core Ultra 9 275HX) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core Ultra 9 275HX targets High-End Gaming Laptop. Direct competitor: EPYC 4545P rivals Ryzen 9 7900X; Core Ultra 9 275HX rivals Ryzen 9 9955HX.