SouthBridge Max PCIe 4.0 x4 12-Port Expansion Card (NVMe M2, USB, SATA) The B650 southbridge chip transforms into PCIe expansion card - 4x M.2 NVMe, 4x SATA6, 2x 10G-A, 1x 10G-C, & 1x 20G-C port.

1. 12-IN-1 EXPANSION FOR STORAGE & CONNECTIVITY Turn one PCIe 4.0 x4 slot into a versatile expansion hub with 4× M.2 NVMe slots, 4× SATA 6Gbps ports, 2× USB-A 10Gbps, 1× USB-C 10Gbps, and 1× USB-C 20Gbps ports. Ideal for upgrading desktops, workstations, NAS systems, media servers, and high-performance PCs.
2. NO PCIe BIFURCATION REQUIRED Unlike many multi-M.2 adapter cards that depend on motherboard PCIe lane bifurcation, the SY-PEX50133 uses an onboard AMD B650 chipset to manage device connectivity. Install it in a PCIe x4, x8, or x16 slot without requiring motherboard bifurcation settings or BIOS lane-splitting configuration.
3. EXPAND UP TO FOUR M.2 NVMe SSDs Supports four M.2 M-Key NVMe SSDs in 2230/2242/2260/2280 form factors. The two front M.2 slots support up to PCIe x4 links, while the two rear slots support x2 links. When all four slots are populated, bandwidth is intelligently allocated across the available PCIe connection.
4. FOUR SATA 6Gbps + FOUR HIGH-SPEED USB PORTS Add up to four SATA storage devices with SATA 6Gbps connectivity while also gaining 2× USB-A 10Gbps, 1× USB-C 10Gbps, and 1× USB-C 20Gbps ports. One expansion card can replace the need for separate storage and USB controller cards.
5. PCIe 4.0 PERFORMANCE & BROAD OS SUPPORT Uses a PCIe 4.0 x4 host interface with up to 16 GT/s per lane and backward compatibility with PCIe Gen 3/2/1. Compatible with Windows 10/11, Linux, and macOS. A practical all-in-one upgrade for high-density storage, content creation, virtualization, NAS, and professional workstation applications.

This SY-PEX50133 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. 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.