I am building a server that will benefit from SATA III, but the motherboard that I will be using only has SATA II support. As such, I was considering using a SATA III card on my motherboard. My only concern is the interface between the motherboard and the card. I have four hard drives to connect, with more to be added later as needed. Most of the cards that I have found are PCI-E x4 or x8. Will this "bottleneck" the data transfer?