Brain Fart!

Hello All,

Is a SATA 6gb backwards compatible to SATA 3gb (Hard Drive)? Or do I get just a SATA 3gb.

Putting a old system together for a friend that is on a set income. Can't afford anything new. Not in less he goes through Finger-hut to buy a overly priced computer.

This is what I have now:
AMD M3A78 AM2/AM2+ CPU Support up to 140W Motherboard.
AMD Phenom II X4 955 Quad Core CPU.
Arctic Freezer Heatsink/fan (older version).
4gb - Patriot DDR2 - 2 X 2GB - PDC24G5300LLK - 667 MHz.
600W...

Brain Fart!