The SI-HUB50066 with ASM1074L chipset adds two USB3.0 downstream ports for this Hub Controller. The hub is integrated with the AS Media Super Speed USB3.0 and USB2.0 self design PHYs which enables the high speed interface up to 5Gbps. Also building into the hubs is a high performance USB3.0 card reader controller - NS1081C. It interfaces with the various flash memory cards such as Secure Digital, SDHC, SDXC, mini SD, micro SD, Multimedia Card, RSMMC, MMC micro, or MMC mobile. It also supports high density memory cards with a capacity up to 2TB.