Multiple desktop hard drives(and ssd's) in 2 or more RAIDS?

Rhyled is right. SSD's are very tricky to RAID and still keep performance. RAIDing mis-matched drives is also tuff especially SSD with conventional drives. The Z68 chip is suppose to make it easier but I haven't tried it yet. I'm not a big fan of SSD as they don't have a "track record" yet but I do have a crucial 64GB as my OS drive and a WD 1T as the regular drive. There are "Hybrid" drives out there that combine SSD and conventional drives in one unit.