![]() The board upgrades its general purpose lanes from PCIe 2.x to PCIe Gen3 as one of the primary changes.Ĭompared to B550, the largest difference is support of PCIe Gen4 for PEG (or PCIe Graphics) and for CPU storage. It does not offer any additional USB ports beyond these at least, not without using some of the general purpose PCIe lanes to do it. The CPU USB support is expanded for 3000-series Ryzen CPUs, marked in small text below the 1x USB 3.2 Gen2 text, and nothing else changes here. Getting straight into the specs, it’s pretty simple: AMD highlights A520 as only upgrading a few points. These parts will be available through motherboard manufacturers immediately, both to DIY and to OEM markets. You can expect A520 on low-end motherboards, particularly those in the sub-$100 range. The A320 chipset was among the cheapest available to DIY users and has persisted unreplaced until now. The last 3 might not sound familiar, because they basically stopped getting marketed: You can technically run Ryzen CPUs without a chipset, and the X300 part was targeted toward boards that were intended to be so small that there was no space for a separate chipset component. If you’d forgotten, AMD originally launched Ryzen with A320, X300, and A/B300 at the low-end. ![]()
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