Still not needed. As he was explaining, your total through put is not based on the SATA channel max, but the SATA total throughput for all channels used. As such, each new SATA lane you add, the more throughput you get. Example: 1 HDD + 1 SATA2 plug = 300 MB/s max theoretical 2 HDD + 2 SATA2 plug = 600 MB/s max theoretical 3 HDD + 3 SATA2 plug = 900 MB/s max theoretical 4 HDD + 4 SATA2 plug = 1200 MB/s max theoretical etc. as each HDD will have their own SATA lane to themself This HDD will never full saturate a SATA 2 lane, so have all the extra throughput from a SATA 3 setup is pointless cause it will never be used.