PC switches on/off during RAM overclocking.
PC switches on/off during RAM overclocking.
Zen 2 and Zen 3 generally achieve around 3600MT/s reliably, though this isn't always assured. These APUs feature superior memory controllers compared to standard desktop CPUs. Motherboards with fewer PCB layers tend to maintain better signal quality for RAM connections. Adding more sticks or ranks increases demand, and officially supported speeds drop when using 4 DIMMS or dual rank DIMMS configurations. I tested a 3900X on an ASRock X570 Creator and achieved up to 3800MT/s, while the same CPU in an X370 Taichi reached only 3333MT/s.
first gen mainboards faced problems with ram compatibility because it was a new platform and the wrong ram topology was chosen. For the 400 series chipset, the issue was fixed (with some exceptions like x470 taichy). If you don’t modify the CAD settings, the maximum speed is around 3400MHz. With CAD adjustments, you can reach up to 3600MHz.