Lekuo’s PCIe Card Turns a B650 Chipset into Linux-friendly I/O Expansion

Phoronix reviews Lekuo's SouthBridge Max, a PCIe add-in card that carries an AMD B650 chipset to expand USB/SATA/NVMe I/O. Tested on a Ryzen 7 8700G with Ubuntu 26.04 and Linux 7.0, the card worked out-of-the-box on Linux and delivered expected performance for a single NVMe SSD via PCIe 4.0 x4, though bandwidth can bottleneck when fully leveraging all I/O. Priced around $120, it's a Linux-friendly option with potential for PCIe 5.0/lane upgrades in future.