What is sata 3 support?

[odyody]

many new motherboards support sata 3 ,some times only this option increase the price of the mother as 890 chipset for amd.
so what is it ?
is it a new slot for new generation of hard drives .
or
an option to increase the speed of sata hard drives.
and
is this option is enough to pay an extra budget to buy a mother with 890 chipset instead of 880 or 785 .

i ll be glade for help

 

[jefe323]

this might help:

http://en.wikipedia.org/wiki/Serial_ATA#SATA_Revision_3.0_.28SATA_6_Gbit.2Fs.29

 

[odyody]

ok ,can u mention som motherboards that support sata 3.