I have an ASUS Sabertooth 990FX Motherboard. My case has two sets of USB2.0, and two header cables. I also have an internal USB SATA/Memory card reader I need a third USB header for that. I understand I risk severe damage to my Motherboard if I plug it into 1394a, or what ever FireWire is called, but could I plug it into the USB 3.0 header? If so, which pins do I connect it to? Please and thank you.
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ASUS 990FX USB header
- Thread starter fgf80
- Start date
- Joined
- Apr 20, 2004
- Location
- JAX, Mississauna
- Joined
- Apr 8, 2009
- Location
- Sacramento,Ca.
Your USB3 header is a 20 pin out and a usb2 pin out is not compatible.
I think your only choice is to give up one of the rear connections and use the header for the memory card reader.
I think your only choice is to give up one of the rear connections and use the header for the memory card reader.
- Joined
- Apr 20, 2004
- Location
- JAX, Mississauna
A new keying method is used to enable backward connectivity and operation with USB 2.0. Where either a USB 2.0 plug OR receptacle is used the connection is limited to USB 2.0 speeds, whereas when USB 3.0 plugs and receptacles are used USB 3.0 speeds are supported.
Usb 3.0 ports are backwards compatible with Usb 2.0 so you certainly can use the correct four pins of the Usb 3.0 to service your Usb 2.0 ports.
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