Whitch is SATA 3 port?

[DeathGhost]

So I got a new 3TB HDD and ran in little problem. I do not know whitch port is SATA 3 in my MSI Z68A-G43 (G3) motherboard. I already have a HDD connected into port 3 whitch is SATA 3, but I'm not so sure about port 4. Can anyone help?

 

[Suztera]

SATA 1 and 2 is SATA 3. SATA 3-6 are SATA 2

 

[unksol]

It's a hard drive it doesn't matter where you plug it in SATA 3 ports only matter for SSDs