Lekuo SouthBridge Max PCIe 4.0 Multi-Function Expansion Card - No Motherboard Bifurcation Required

About this product

• Innovative B650 AIC: Repurposes a native B650 chipset into a standard PCIe 4.0 x4 card for versatile IO expansion. • No Bifurcation Needed: Onboard silicon handles all lanes natively — plug-and-play on mainstream, ITX, or legacy systems. • High-Density Storage: Connects up to 4 x M.2 NVMe SSDs and 4 x SATA 6Gbps ports simultaneously. Lekuo SouthBridge Max: PCIe 4.0 Multi-Function Card (B650 AIC, No Bifurcation Required) Product Overview This adapter card is based on the B650 southbridge chip and transforms a native motherboard chipset into a standard PCIe expansion device. Via a PCIe 4.0 x4 upstream interface, it provides four M.2 NVMe slots (two on the front supporting x4, two on the back supporting x2), four SATA 6Gbps ports, two 10Gbps USB-A ports, one 10Gbps USB-C port, and one 20Gbps USB-C port. Its M.2 interfaces feature intelligent bandwidth allocation: when only the front dual-drive slots are in use, both operate on x4 links when all four slots are occupied, the system automatically adjusts to x2 links(The interface shares the PCIe 4.0 x4 upstream speed). This card is suitable for high-end PCs, workstations, media processing, NAS systems, and gamers, providing a one-stop expansion solution for high-density storage and high-speed peripherals. Features • PCI Express - PCIe Gen4 x4（64Gbps Theoretical Uplink Bandwidth）, backward compatible with Gen3/Gen2/Gen1 - Supports a data transfer rate of 16 GT/s per lane - Supports three power-saving modes: L0, L1, and L1SS - PCI MSI, MSI-X, ASPM, AER, LTR, VC • 4 SATA Ports - Supports four SATA ports with a maximum data transfer rate of 6 Gb/s. - Supports first- and second-generation SATA standard devices. - Complies with the SATA 3.3 specification. - Supports AHCI 1.3.1 mode. - AHCI mode features the following functions: ➢ DIPM ➢ HIPM ➢ Hot-plug detection and notification ➢ NCQ mode ➢ Device sleep mode • USB Ports - Supports 2 USB-A (10G) ports, 1 USB-C (10G) port, and 1 USB-C (20G) port; - Supports all xHCI 1.1 features; - Compatible with traditional keyboard/mouse devices; - Supports wake-up functionality in S3/S4 modes; - Supports port disabling via independent control. • M.2 Ports - Compliant with PCI Express Base Specification Version 4.0 - Compliant with PCI Express M.2 Specification Version 1.1 - Supports PCI Express link power management - Supports M.2 form factors: 2230/2242/2260/2280 - Supports M.2 M Key - Supports four standard M.2 interfaces, with the two front M.2 interfaces (M.2_A, M.2_C) supporting X4 links, and the two rear interfaces (M.2_B, M.2_D) supporting X2 links. Note: When all M.2 slots are occupied, all four M.2 slots operate at x2 bandwidth. If only the two front M.2 slots are used, they operate at x4 bandwidth; if only the two rear M.2 slots are used, they operate at x2 bandwidth. • 6-Pin — addresses the power delivery ceiling only; the 64Gbps shared bandwidth is unchanged. System Support • Windows • Linux • Mac OS Complete Package Contents 1 x Lekuo SouthBridge Max 1 x User Manual 10 x Screws 2 x 6.5mm Copper Stands 2 x 1.5mm Copper Stands 1 x Short Metal Plate