"Will one sata power cable power this? i see it comes with two forms of power i have an extra supply from an ssd?

Yes, one power cable is all it needs. The y adaptors are just for convenience if you need to split the power with another device.

Questions & Answers: OWNSUN PCI-E to Type C (2),Type A (3) USB 3.0 5-Port PCI Express Expansion Card +Expanding 2 USB 3.0 Ports with Internal 19-Pin Connector for Window 7/8/10/XP/Vista

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OWNSUN PCI-E to Type C (2),Type A (3) USB 3.0 5-Port PCI Express Expansion Card +Expanding 2 USB 3.0 Ports with Internal 19-Pin Connector for Window 7/8/10/XP/Vista

6-Port USB Expansion Card Add 3 USB C, 2 USB A, and 1 internal 19-pin connector to PC via PCIe x1 slot to connect multiple devices at the same time.
Fast and Efficient USB 3.0 Fresco Logic 1100 Chipset, support up to 5Gbps transfer speed, transfer videos, photos, files, etc. between USB devices and computer with higher efficiency.
Wide Compatibility This PCIE expansion card is compatible with PCIE 3.0 PCIE 2.0 and PCIE 1.0 motherboards, and the operating system supports Windows 7, 8, 10, MacOS, Linux. Note: Win 10/8 MacOS 10.9 Linux does not require any drivers, Windows 7 requires drivers to be installed, you can find the drivers on the CD provided by us.
[Safe and stable] The explosion-proof capacitors are made of polymer dielectric materials, and each interface is equipped with a voltage-stabilizing capacitor. It can provide good temperature control during operation to ensure stable power supply for each interface.

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