RAID controller card

Okay! So I’m running a low budget system (i7 3770 on Asus P8H77-V LE). The MB has 6 SATA ports, only two of which are SATA 3. I’ve got two raids running (0 and 5) and all of my drives are SATA 3 compatible My question is: can I get a raid controller for PCIe 2.0 that will actually achieve the...

I bought this SAS Controller from eBay: "FUJITSU SAS RAID Controller D2616-A22 GS1 PCI-E x8 6Gbps LSI MegaRAID" and I would like to connect 8 SATA HDDs into the card. I have no previous experience with SATA connections and it seems there are quire a few different cables out there. What kind of...