Thanks for quick replay.
But I know that SSDs are SATA3 6Gb/s
And I checked the spec of my mobo, on the storage tab. http://www.asus.com/Motherboard/M4A785M/#specifications
1 xUltraDMA 133/100/66
6 xSATA 3 Gb/s ports Support RAID 0,1,10,JBOD
So my mobo only support up to 3Gb/s? does it effect any performance if I get a 6Gb/s SSD connect it into a 3Gb/s port?