Help with ps3 hard drive

Hey,

Just wanted to double check that these three hard drives are fine for the ps3? Why does the first say 1.5gb/s but the other two say 3gb/s? Also, what's the difference between SATA and SATA II?

http://www.ebay.com.au/itm/320GB-SATA-2-5-HDD-5400rpm-NEW-Laptops-PS3-Upgrade-/300363667964?pt=AU_Laptop_Accessories&hash=item45ef11d9fc

http://www.ebay.com.au/itm/320GB-2-5-SATA-Laptop-Internal-HDD-Hard-Disk-Drive-PS3-/220620563616?pt=AU_HardDrives&hash=item335e02a4a0

http://www.ebay.com.au/itm/WD-2-5-320GB-SATA-II-Laptop-PS3-Hard-Disk-Drive-HDD-HD-/251182273936?pt=AU_HardDrives&hash=item3a7ba15590

Thanks :)

Thanks. Why is the first one 1.5gb and the second 3gb, when they're both the same hard drive? Also, I read that even if you put a 3gb/s one in the the ps3, it will still limit it to 1.5gb. Is that true? Heard of some people having trouble getting the 3gb one to work as well. natenation87