So I'm about to buy my new computer, and because I'm slightly paranoid because I am putting so much money into this, I was checking compatiblity, and making sure speeds were okay, when I realized my motherboard only runs my two PCIe 2.0 at x16 and x8, not dual x16. In the long run, is this going to make a big difference? I got dual 560's by community suggestion for its superior performance and price compared to the GTX580. However, if they run at different speeds, not the maximum, is this going to impact their performance?
Also, I have a choice of 2*x16 with 8 SATA ports, and x16+x8 and 6 SATA ports. I will use 6 ports for harddrives (I'm using my dads old [email protected], and his 3 [email protected],000RPM.) with one of the ports used for CD drive. Do I need the two extra SATA or no?