3R 7320U operates at 6nm while the 5R 7530U uses 7nm technology.
3R 7320U operates at 6nm while the 5R 7530U uses 7nm technology.
You're puzzled by the differences in chip specifications between those two models. The AMD naming system can seem confusing at first, but it generally follows a pattern where the third number often indicates a generation or codename. The R3 7320u is indeed 6nm and uses DDR5, while the R5 7530u is 7nm with DDR4. The third digit in the model names usually points to a specific architecture line—like Zen—so the 7530u likely represents a newer Zen-based design compared to the 7320u. This helps distinguish newer generations even when the exact process node isn't always clearly stated.
The 7530U is essentially a Ryzen 5 Pro 5675U. AMD simply changed the label and added a 200MHz boost clock, naming it the 7530U. The 7320U, on the other hand, represents an updated version of Zen 2 using the "6nm" process—actually still a 7nm design—but with improved power efficiency. TSMC adjusted the naming for marketing reasons. Many Ryzen 7000 series models are just rebranded versions of older chips.