Unlike the X570 and B550, the A520 does not have PCIe 4.0 support. The I/O connections are limited to 6 PCIe Gen3 lanes, 4 SATA, and 9 USBs. Similar to the A320 series, the new models won’t support overclocking.
ASRock B550/A520https://t.co/YnOA3oKDaVhttps://t.co/3kvzafPrvN
— 188? (@momomo_us) June 5, 2020