I have 2x 160GB Sata Seagate HDs on a RAID 0. I don't know the temp either but they run hot also. It doesn't seem to make a difference on their performance, however. I know alot of people with large Sata drives and 10,000k RPM Sata drives. They all run hotter than you would expect if you've never had one, so I wouldn't worry about it too much.