Your motherboard documentation should say if it supports SAS. If it doesn't mention anything about it, you'll need an expansion card from Adaptec or Highpoint that supports SAS. SAS drives aren't really intended for desktop systems, they're expensive for less storage and modest performance gains... unless you plan on building a decent sized RAID array, it's probably better to buy more SATA II drives for additional performance.
Thanks that answers my situation... I'll probably stick with what I have, the SATA drives for now. Perry S.