Will my controller allow sata 3.0

I want to set up my Dell Dimension 8400 to allow an eSATA 3.0 connection. Will my host controller reject my external drive if it is operating at 3.0 instead of 1.5?

If so, can I reset the controller to accept the 3.0 drive?

Thanks!
 
SATA is backwards compatible. It will just run at the slower speed. Also I haven't heard of SATA 3.0 only 2.0, but I could be out of the loop.
 
Back