The SATA power port only support 12V 2A power max. Please connect the extral power for your PCI-E card if the power is insufficient. ^^ Oculink 4x connectors are internal and external small form factor PCI-E connectors and cables optimized for the client and market. ^^ This oculink pci-e converter enables belowing applications. ^^ One PCIE PCI-Express 16x 4x device can be connected, The converter can be installed into the system internally through the SFF-8611/8612 oculink interface. ^^ The converter support all standard PCI-E 16x 8x 4x card, like USB, LAN, 1394, Audio, Graphics Card.